Merge remote-tracking branch 'newdev/master'

Conflicts: Changelog doc/APIchanges doc/optimization.txt libavformat/avio.h Merged-by: Michael Niedermayer <michaelni@gmx.at>
author: Michael Niedermayer 2011-03-17 16:53:58 +0100
committer: Michael Niedermayer 2011-03-17 17:22:52 +0100
commit: 0fecf2642b9d909820683647c70031a954f5e58d (patch)
tree: 36ca02de9fa27a049829fb589517223d2d0ce5f5
parent: e309fdc7018a1027d187ec27fb1d69a41a4ee167 (diff)
parent: f1f60f5252b0b448adcce0c1c52f3161ee69b9bf (diff)
174 files changed, 1108 insertions, 975 deletions
diff --git a/CREDITS b/CREDITS
index 1d0666b6df..4a537786f0 100644
--- a/CREDITS
+++ b/CREDITS
@@ -1,5 +1,5 @@
 This file contains the names of some of the people who have contributed to
-FFmpeg. The names are sorted alphabetically by last name.  As this file is
+Libav/FFmpeg. The names are sorted alphabetically by last name.  As this file is
 currently quite outdated and git serves as a much better tool for determining
 authorship, it remains here for historical reasons only.
 
diff --git a/Changelog b/Changelog
index f05ba0d585..e9b5be8feb 100644
--- a/Changelog
+++ b/Changelog
@@ -79,6 +79,7 @@ version <next>:
 - Bink version 'b' audio and video decoder
 - Bitmap Brothers JV playback system
 - Linux framebuffer input device added
+- Apple HTTP Live Streaming protocol handler
 
 
 version 0.6:
diff --git a/Doxyfile b/Doxyfile
index 1173836cb1..a7782f1fcf 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -25,7 +25,7 @@ DOXYFILE_ENCODING      = UTF-8
 # The PROJECT_NAME tag is a single word (or a sequence of words surrounded
 # by quotes) that should identify the project.
 
-PROJECT_NAME           = FFmpeg
+PROJECT_NAME           = Libav
 
 # The PROJECT_NUMBER tag can be used to enter a project or revision number.
 # This could be handy for archiving the generated documentation or
diff --git a/INSTALL b/INSTALL
index 8cd22bd441..2ed04ef2b9 100644
--- a/INSTALL
+++ b/INSTALL
@@ -2,10 +2,10 @@
 1) Type './configure' to create the configuration. A list of configure
 options is printed by running 'configure --help'.
 
-'configure' can be launched from a directory different from the FFmpeg
+'configure' can be launched from a directory different from the Libav
 sources to build the objects out of tree. To do this, use an absolute
-path when launching 'configure', e.g. '/ffmpegdir/ffmpeg/configure'.
+path when launching 'configure', e.g. '/libavdir/libav/configure'.
 
-2) Then type 'make' to build FFmpeg. GNU Make 3.81 or later is required.
+2) Then type 'make' to build Libav. GNU Make 3.81 or later is required.
 
 3) Type 'make install' to install all binaries and libraries you built.
diff --git a/LICENSE b/LICENSE
index 8d4d6515b0..3b233c67c1 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,17 +1,17 @@
-FFmpeg:
+Libav:
 -------
 
-Most files in FFmpeg are under the GNU Lesser General Public License version 2.1
+Most files in Libav are under the GNU Lesser General Public License version 2.1
 or later (LGPL v2.1+). Read the file COPYING.LGPLv2.1 for details. Some other
 files have MIT/X11/BSD-style licenses. In combination the LGPL v2.1+ applies to
-FFmpeg.
+Libav.
 
-Some optional parts of FFmpeg are licensed under the GNU General Public License
+Some optional parts of Libav are licensed under the GNU General Public License
 version 2 or later (GPL v2+). See the file COPYING.GPLv2 for details. None of
 these parts are used by default, you have to explicitly pass --enable-gpl to
-configure to activate them. In this case, FFmpeg's license changes to GPL v2+.
+configure to activate them. In this case, Libav's license changes to GPL v2+.
 
-Specifically, the GPL parts of FFmpeg are
+Specifically, the GPL parts of Libav are
 
 - libpostproc
 - optional x86 optimizations in the files
@@ -33,14 +33,14 @@ external libraries:
 -------------------
 
 Some external libraries, e.g. libx264, are under GPL and can be used in
-conjunction with FFmpeg. They require --enable-gpl to be passed to configure
+conjunction with Libav. They require --enable-gpl to be passed to configure
 as well.
 
 The OpenCORE external libraries are under the Apache License 2.0. That license
 is incompatible with the LGPL v2.1 and the GPL v2, but not with version 3 of
-those licenses. So to combine the OpenCORE libraries with FFmpeg, the license
+those licenses. So to combine the OpenCORE libraries with Libav, the license
 version needs to be upgraded by passing --enable-version3 to configure.
 
-The nonfree external library libfaac can be hooked up in FFmpeg. You need to
+The nonfree external library libfaac can be hooked up in Libav. You need to
 pass --enable-nonfree to configure to enable it. Employ this option with care
-as FFmpeg then becomes nonfree and unredistributable.
+as Libav then becomes nonfree and unredistributable.
diff --git a/Makefile b/Makefile
index ad1f737ebb..1ec443699e 100644
--- a/Makefile
+++ b/Makefile
@@ -177,7 +177,7 @@ distclean::
 	$(RM) version.h config.* libavutil/avconfig.h
 
 config:
-	$(SRC_PATH)/configure $(value FFMPEG_CONFIGURATION)
+	$(SRC_PATH)/configure $(value LIBAV_CONFIGURATION)
 
 # regression tests
 
diff --git a/README b/README
index e907e90223..6346cff926 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-FFmpeg README
+Libav README
 -------------
 
 1) Documentation
diff --git a/cmdutils.c b/cmdutils.c
index d44aa9ea08..730ba63d63 100644
--- a/cmdutils.c
+++ b/cmdutils.c
@@ -399,7 +399,7 @@ static int warned_cfg = 0;
         }                                                               \
         if (flags & SHOW_CONFIG) {                                      \
             const char *cfg = libname##_configuration();                \
-            if (strcmp(FFMPEG_CONFIGURATION, cfg)) {                    \
+            if (strcmp(LIBAV_CONFIGURATION, cfg)) {                     \
                 if (!warned_cfg) {                                      \
                     fprintf(outstream,                                  \
                             "%sWARNING: library configuration mismatch\n", \
@@ -425,17 +425,17 @@ static void print_all_libs_info(FILE* outstream, int flags)
 
 void show_banner(void)
 {
-    fprintf(stderr, "%s version " FFMPEG_VERSION ", Copyright (c) %d-%d the FFmpeg developers\n",
+    fprintf(stderr, "%s version " LIBAV_VERSION ", Copyright (c) %d-%d the Libav developers\n",
             program_name, program_birth_year, this_year);
     fprintf(stderr, "  built on %s %s with %s %s\n",
             __DATE__, __TIME__, CC_TYPE, CC_VERSION);
-    fprintf(stderr, "  configuration: " FFMPEG_CONFIGURATION "\n");
+    fprintf(stderr, "  configuration: " LIBAV_CONFIGURATION "\n");
     print_all_libs_info(stderr, INDENT|SHOW_CONFIG);
     print_all_libs_info(stderr, INDENT|SHOW_VERSION);
 }
 
 void show_version(void) {
-    printf("%s " FFMPEG_VERSION "\n", program_name);
+    printf("%s " LIBAV_VERSION "\n", program_name);
     print_all_libs_info(stdout, SHOW_VERSION);
 }
 
diff --git a/configure b/configure
index b6d12f6991..9ac19696e4 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# FFmpeg configure script
+# Libav configure script
 #
 # Copyright (c) 2000-2002 Fabrice Bellard
 # Copyright (c) 2005-2008 Diego Biurrun
@@ -44,9 +44,9 @@ if test "$E1" != 0 || test "$E2" = 0; then
     echo "No compatible shell script interpreter found."
     echo "This configure script requires a POSIX-compatible shell"
     echo "such as bash or ksh."
-    echo "THIS IS NOT A BUG IN FFMPEG, DO NOT REPORT IT AS SUCH."
+    echo "THIS IS NOT A BUG IN LIBAV, DO NOT REPORT IT AS SUCH."
     echo "Instead, install a working POSIX-compatible shell."
-    echo "Disabling this configure test will create a broken FFmpeg."
+    echo "Disabling this configure test will create a broken Libav."
     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
         echo "This bash version ($BASH_VERSION) is broken on your platform."
         echo "Upgrade to a later version if available."
@@ -238,7 +238,7 @@ Advanced options (experts only):
   --enable-sram            allow use of on-chip SRAM
   --disable-symver         disable symbol versioning
 
-Developer options (useful when working on FFmpeg itself):
+Developer options (useful when working on Libav itself):
   --disable-debug          disable debugging symbols
   --enable-debug=LEVEL     set the debug level [$debuglevel]
   --disable-optimizations  disable compiler optimizations
@@ -280,7 +280,7 @@ die(){
 
 If you think configure made a mistake, make sure you are using the latest
 version from Git.  If the latest version fails, report the problem to the
-ffmpeg-user@mplayerhq.hu mailing list or IRC #ffmpeg on irc.freenode.net.
+libav-user@libav.org mailing list or IRC #libav on irc.freenode.net.
 EOF
     if disabled logging; then
         cat <<EOF
@@ -1672,7 +1672,7 @@ for v in "$@"; do
     r=${v#*=}
     l=${v%"$r"}
     r=$(sh_quote "$r")
-    FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
+    LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
 done
 
 find_things(){
@@ -1784,7 +1784,7 @@ done
 
 disabled logging && logfile=/dev/null
 
-echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
+echo "# $0 $LIBAV_CONFIGURATION" > $logfile
 set >> $logfile
 
 test -n "$cross_prefix" && enable cross_compile
@@ -2344,7 +2344,7 @@ case $target_os in
     openbsd)
         enable malloc_aligned
         # On OpenBSD 4.5. the compiler does not use PIC unless
-        # explicitly using -fPIC. FFmpeg builds fine without PIC,
+        # explicitly using -fPIC. Libav builds fine without PIC,
         # however the generated executable will not do anything
         # (simply quits with exit-code 1, no crash, no output).
         # Thus explicitly enable PIC here.
@@ -2369,7 +2369,8 @@ case $target_os in
         enable malloc_aligned
         gas="gas-preprocessor.pl $cc"
         enabled ppc && add_asflags -force_cpusubtype_ALL
-        SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR) -Wl,-read_only_relocs,suppress'
+        SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
+        enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
         strip="${strip} -x"
         add_ldflags -Wl,-dynamic,-search_paths_first
         SLIBSUF=".dylib"
@@ -2478,7 +2479,7 @@ case $target_os in
         ;;
 esac
 
-echo "config:$arch:$subarch:$cpu:$target_os:$cc_ident:$FFMPEG_CONFIGURATION" >config.fate
+echo "config:$arch:$subarch:$cpu:$target_os:$cc_ident:$LIBAV_CONFIGURATION" >config.fate
 
 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable pic
 
@@ -3201,9 +3202,9 @@ config_files="$TMPH config.mak"
 
 cat > config.mak <<EOF
 # Automatically generated by configure - do not modify!
-ifndef FFMPEG_CONFIG_MAK
-FFMPEG_CONFIG_MAK=1
-FFMPEG_CONFIGURATION=$FFMPEG_CONFIGURATION
+ifndef LIBAV_CONFIG_MAK
+LIBAV_CONFIG_MAK=1
+LIBAV_CONFIGURATION=$LIBAV_CONFIGURATION
 prefix=$prefix
 LIBDIR=\$(DESTDIR)$libdir
 SHLIBDIR=\$(DESTDIR)$shlibdir
@@ -3292,10 +3293,10 @@ get_version LIBAVFILTER libavfilter/avfilter.h
 
 cat > $TMPH <<EOF
 /* Automatically generated by configure - do not modify! */
-#ifndef FFMPEG_CONFIG_H
-#define FFMPEG_CONFIG_H
-#define FFMPEG_CONFIGURATION "$(c_escape $FFMPEG_CONFIGURATION)"
-#define FFMPEG_LICENSE "$(c_escape $license)"
+#ifndef LIBAV_CONFIG_H
+#define LIBAV_CONFIG_H
+#define LIBAV_CONFIGURATION "$(c_escape $LIBAV_CONFIGURATION)"
+#define LIBAV_LICENSE "$(c_escape $license)"
 #define FFMPEG_DATADIR "$(eval c_escape $datadir)"
 #define CC_TYPE "$cc_type"
 #define CC_VERSION $cc_version
@@ -3346,8 +3347,8 @@ LAVFI_TESTS=$(print_enabled  -n _test $LAVFI_TESTS)
 SEEK_TESTS=$(print_enabled   -n _test $SEEK_TESTS)
 EOF
 
-echo "#endif /* FFMPEG_CONFIG_H */" >> $TMPH
-echo "endif # FFMPEG_CONFIG_MAK" >> config.mak
+echo "#endif /* LIBAV_CONFIG_H */" >> $TMPH
+echo "endif # LIBAV_CONFIG_MAK" >> config.mak
 
 # Do not overwrite an unchanged config.h to avoid superfluous rebuilds.
 cp_if_changed $TMPH config.h
@@ -3411,10 +3412,10 @@ Cflags: -I\${includedir}
 EOF
 }
 
-pkgconfig_generate libavutil "FFmpeg utility library" "$LIBAVUTIL_VERSION"
-pkgconfig_generate libavcodec "FFmpeg codec library" "$LIBAVCODEC_VERSION" "$extralibs"
-pkgconfig_generate libavformat "FFmpeg container format library" "$LIBAVFORMAT_VERSION" "$extralibs" "libavcodec = $LIBAVCODEC_VERSION"
-pkgconfig_generate libavdevice "FFmpeg device handling library" "$LIBAVDEVICE_VERSION" "$extralibs" "libavformat = $LIBAVFORMAT_VERSION"
-pkgconfig_generate libavfilter "FFmpeg video filtering library" "$LIBAVFILTER_VERSION" "$extralibs"
-pkgconfig_generate libpostproc "FFmpeg post processing library" "$LIBPOSTPROC_VERSION"
-pkgconfig_generate libswscale "FFmpeg image rescaling library" "$LIBSWSCALE_VERSION" "" "libavutil = $LIBAVUTIL_VERSION"
+pkgconfig_generate libavutil "Libav utility library" "$LIBAVUTIL_VERSION"
+pkgconfig_generate libavcodec "Libav codec library" "$LIBAVCODEC_VERSION" "$extralibs"
+pkgconfig_generate libavformat "Libav container format library" "$LIBAVFORMAT_VERSION" "$extralibs" "libavcodec = $LIBAVCODEC_VERSION"
+pkgconfig_generate libavdevice "Libav device handling library" "$LIBAVDEVICE_VERSION" "$extralibs" "libavformat = $LIBAVFORMAT_VERSION"
+pkgconfig_generate libavfilter "Libav video filtering library" "$LIBAVFILTER_VERSION" "$extralibs"
+pkgconfig_generate libpostproc "Libav post processing library" "$LIBPOSTPROC_VERSION"
+pkgconfig_generate libswscale "Libav image rescaling library" "$LIBSWSCALE_VERSION" "" "libavutil = $LIBAVUTIL_VERSION"
diff --git a/doc/APIchanges b/doc/APIchanges
index ff88d7f269..883258da41 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,6 +15,11 @@ API changes, most recent first:
 2011-XX-XX - XXXXXXX - lavu  XX.XXX.X - pixfmt.h
   Add PIX_FMT_BGR48LE and PIX_FMT_BGR48BE pixel formats
 
+2011-03-02 - 863c471 - lavf  52.103.0 - av_pkt_dump2, av_pkt_dump_log2
+  Add new functions av_pkt_dump2, av_pkt_dump_log2 that uses the
+  source stream timebase for outputting timestamps. Deprecate
+  av_pkt_dump and av_pkt_dump_log.
+
 2011-02-20 - e731b8d - lavf  52.102.0 - avio.h
   * e731b8d - rename init_put_byte() to ffio_init_context(), deprecating the
               original, and move it to a private header so it is no longer
diff --git a/doc/bitstream_filters.texi b/doc/bitstream_filters.texi
index 1ad67cd5ef..c33fca6c51 100644
--- a/doc/bitstream_filters.texi
+++ b/doc/bitstream_filters.texi
@@ -1,7 +1,7 @@
 @chapter Bitstream Filters
 @c man begin BITSTREAM FILTERS
 
-When you configure your FFmpeg build, all the supported bitstream
+When you configure your Libav build, all the supported bitstream
 filters are enabled by default. You can list all available ones using
 the configure option @code{--list-bsfs}.
 
diff --git a/doc/build_system.txt b/doc/build_system.txt
index 8a200695a5..5a59f350bb 100644
--- a/doc/build_system.txt
+++ b/doc/build_system.txt
@@ -1,4 +1,4 @@
-FFmpeg currently uses a custom build system, this text attempts to document
+Libav currently uses a custom build system, this text attempts to document
 some of its obscure features and options.
 
 Options to make:
diff --git a/doc/demuxers.texi b/doc/demuxers.texi
index 05316ce5cd..bbdde9c92d 100644
--- a/doc/demuxers.texi
+++ b/doc/demuxers.texi
@@ -1,10 +1,10 @@
 @chapter Demuxers
 @c man begin DEMUXERS
 
-Demuxers are configured elements in FFmpeg which allow to read the
+Demuxers are configured elements in Libav which allow to read the
 multimedia streams from a particular type of file.
 
-When you configure your FFmpeg build, all the supported demuxers
+When you configure your Libav build, all the supported demuxers
 are enabled by default. You can list all available ones using the
 configure option "--list-demuxers".
 
diff --git a/doc/developer.texi b/doc/developer.texi
index acffbe67e2..8a0655e740 100644
--- a/doc/developer.texi
+++ b/doc/developer.texi
@@ -32,12 +32,12 @@ generated by ./configure to understand what is needed.
 
 You can use libavcodec or libavformat in your commercial program, but
 @emph{any patch you make must be published}. The best way to proceed is
-to send your patches to the FFmpeg mailing list.
+to send your patches to the Libav mailing list.
 
 @anchor{Coding Rules}
 @section Coding Rules
 
-FFmpeg is programmed in the ISO C90 language with a few additional
+Libav is programmed in the ISO C90 language with a few additional
 features from ISO C99, namely:
 @itemize @bullet
 @item
@@ -54,7 +54,7 @@ These features are supported by all compilers we care about, so we will not
 accept patches to remove their use unless they absolutely do not impair
 clarity and performance.
 
-All code must compile with GCC 2.95 and GCC 3.3. Currently, FFmpeg also
+All code must compile with GCC 2.95 and GCC 3.3. Currently, Libav also
 compiles with several other compilers, such as the Compaq ccc compiler
 or Sun Studio 9, and we would like to keep it that way unless it would
 be exceedingly involved. To ensure compatibility, please do not use any
@@ -76,7 +76,7 @@ The TAB character is forbidden outside of Makefiles as is any
 form of trailing whitespace. Commits containing either will be
 rejected by the Subversion repository.
 
-The main priority in FFmpeg is simplicity and small code size in order to
+The main priority in Libav is simplicity and small code size in order to
 minimize the bug count.
 
 Comments: Use the JavaDoc/Doxygen
@@ -129,7 +129,7 @@ should also be avoided if they don't make the code easier to understand.
    an "or any later version" clause is also acceptable, but LGPL is
    preferred.
 @item
-   You must not commit code which breaks FFmpeg! (Meaning unfinished but
+   You must not commit code which breaks Libav! (Meaning unfinished but
    enabled code which breaks compilation or compiles but does not work or
    breaks the regression tests)
    You can commit unfinished stuff (for testing etc), but it must be disabled
@@ -168,7 +168,7 @@ should also be avoided if they don't make the code easier to understand.
    with functional changes, such commits will be rejected and removed. Every
    developer has his own indentation style, you should not change it. Of course
    if you (re)write something, you can use your own style, even though we would
-   prefer if the indentation throughout FFmpeg was consistent (Many projects
+   prefer if the indentation throughout Libav was consistent (Many projects
    force a given indentation style - we do not.). If you really need to make
    indentation changes (try to avoid this), separate them strictly from real
    changes.
@@ -253,7 +253,7 @@ keeping it as a logical unit that contains an individual change, even
 if it spans multiple files. This makes reviewing your patches much easier
 for us and greatly increases your chances of getting your patch applied.
 
-Use the patcheck tool of FFmpeg to check your patch.
+Use the patcheck tool of Libav to check your patch.
 The tool is located in the tools directory.
 
 Run the regression tests before submitting a patch so that you can
@@ -275,7 +275,7 @@ Your patch will be reviewed on the mailing list. You will likely be asked
 to make some changes and are expected to send in an improved version that
 incorporates the requests from the review. This process may go through
 several iterations. Once your patch is deemed good enough, some developer
-will pick it up and commit it to the official FFmpeg tree.
+will pick it up and commit it to the official Libav tree.
 
 Give us a few days to react. But if some time passes without reaction,
 send a reminder by email. Your patch should eventually be dealt with.
@@ -325,7 +325,7 @@ send a reminder by email. Your patch should eventually be dealt with.
 @item
     Is the patch a unified diff?
 @item
-    Is the patch against latest FFmpeg git master branch?
+    Is the patch against latest Libav git master branch?
 @item
     Are you subscribed to ffmpeg-dev?
     (the list is subscribers only due to spam)
@@ -374,7 +374,7 @@ send a reminder by email. Your patch should eventually be dealt with.
     patch easily?
 @item
     If you added a new file, did you insert a license header? It should be
-    taken from FFmpeg, not randomly copied and pasted from somewhere else.
+    taken from Libav, not randomly copied and pasted from somewhere else.
 @item
     You should maintain alphabetical order in alphabetically ordered lists as
     long as doing so does not break API/ABI compatibility.
diff --git a/doc/encoders.texi b/doc/encoders.texi
index cab98fb0bd..ca1c43d33b 100644
--- a/doc/encoders.texi
+++ b/doc/encoders.texi
@@ -1,10 +1,10 @@
 @chapter Encoders
 @c man begin ENCODERS
 
-Encoders are configured elements in FFmpeg which allow the encoding of
+Encoders are configured elements in Libav which allow the encoding of
 multimedia streams.
 
-When you configure your FFmpeg build, all the supported native encoders
+When you configure your Libav build, all the supported native encoders
 are enabled by default. Encoders requiring an external library must be enabled
 manually via the corresponding @code{--enable-lib} option. You can list all
 available encoders using the configure option @code{--list-encoders}.
diff --git a/doc/eval.texi b/doc/eval.texi
index 99cd034cdf..a989a373a6 100644
--- a/doc/eval.texi
+++ b/doc/eval.texi
@@ -1,7 +1,7 @@
 @chapter Expression Evaluation
 @c man begin EXPRESSION EVALUATION
 
-When evaluating an arithemetic expression, FFmpeg uses an internal
+When evaluating an arithemetic expression, Libav uses an internal
 formula evaluator, implemented through the @file{libavutil/eval.h}
 interface.
 
diff --git a/doc/faq.texi b/doc/faq.texi
index b8a13b79eb..5612ae86f7 100644
--- a/doc/faq.texi
+++ b/doc/faq.texi
@@ -1,8 +1,8 @@
 \input texinfo @c -*- texinfo -*-
 
-@settitle FFmpeg FAQ
+@settitle Libav FAQ
 @titlepage
-@center @titlefont{FFmpeg FAQ}
+@center @titlefont{Libav FAQ}
 @end titlepage
 
 @top
@@ -11,33 +11,33 @@
 
 @chapter General Questions
 
-@section When will the next FFmpeg version be released? / Why are FFmpeg releases so few and far between?
+@section When will the next Libav version be released? / Why are Libav releases so few and far between?
 
-Like most open source projects FFmpeg suffers from a certain lack of
+Like most open source projects Libav suffers from a certain lack of
 manpower. For this reason the developers have to prioritize the work
 they do and putting out releases is not at the top of the list, fixing
 bugs and reviewing patches takes precedence. Please don't complain or
 request more timely and/or frequent releases unless you are willing to
 help out creating them.
 
-@section I have a problem with an old version of FFmpeg; where should I report it?
-Nowhere. We do not support old FFmpeg versions in any way, we simply lack
+@section I have a problem with an old version of Libav; where should I report it?
+Nowhere. We do not support old Libav versions in any way, we simply lack
 the time, motivation and manpower to do so. If you have a problem with an
-old version of FFmpeg, upgrade to the latest Subversion snapshot. If you
+old version of Libav, upgrade to the latest Subversion snapshot. If you
 still experience the problem, then you can report it according to the
 guidelines in @url{http://ffmpeg.org/bugreports.html}.
 
-@section Why doesn't FFmpeg support feature [xyz]?
+@section Why doesn't Libav support feature [xyz]?
 
-Because no one has taken on that task yet. FFmpeg development is
+Because no one has taken on that task yet. Libav development is
 driven by the tasks that are important to the individual developers.
 If there is a feature that is important to you, the best way to get
 it implemented is to undertake the task yourself or sponsor a developer.
 
-@section FFmpeg does not support codec XXX. Can you include a Windows DLL loader to support it?
+@section Libav does not support codec XXX. Can you include a Windows DLL loader to support it?
 
 No. Windows DLLs are not portable, bloated and often slow.
-Moreover FFmpeg strives to support all codecs natively.
+Moreover Libav strives to support all codecs natively.
 A DLL loader is not conducive to that goal.
 
 @section My bug report/mail to ffmpeg-devel/user has not received any replies.
@@ -55,10 +55,10 @@ libav* from another application.
 @item You speak about a video having problems on playback but
 not what you use to play it.
 @item We have no faint clue what you are talking about besides
-that it is related to FFmpeg.
+that it is related to Libav.
 @end itemize
 
-@section Is there a forum for FFmpeg? I do not like mailing lists.
+@section Is there a forum for Libav? I do not like mailing lists.
 
 You may view our mailing lists with a more forum-alike look here:
 @url{http://dir.gmane.org/gmane.comp.video.ffmpeg.user},
@@ -272,7 +272,7 @@ material, and try '-top 0/1' if the result looks really messed-up.
 
 @section How can I read DirectShow files?
 
-If you have built FFmpeg with @code{./configure --enable-avisynth}
+If you have built Libav with @code{./configure --enable-avisynth}
 (only possible on MinGW/Cygwin platforms),
 then you may use any file that DirectShow can read as input.
 
@@ -368,11 +368,11 @@ examining all of the vbv_delay values and making complicated computations."
 
 @chapter Development
 
-@section Are there examples illustrating how to use the FFmpeg libraries, particularly libavcodec and libavformat?
+@section Are there examples illustrating how to use the Libav libraries, particularly libavcodec and libavformat?
 
-Yes. Read the Developers Guide of the FFmpeg documentation. Alternatively,
+Yes. Read the Developers Guide of the Libav documentation. Alternatively,
 examine the source code for one of the many open source projects that
-already incorporate FFmpeg at (@url{projects.html}).
+already incorporate Libav at (@url{projects.html}).
 
 @section Can you support my C compiler XXX?
 
@@ -383,14 +383,14 @@ with @code{#ifdef}s related to the compiler.
 @section Is Microsoft Visual C++ supported?
 
 No. Microsoft Visual C++ is not compliant to the C99 standard and does
-not - among other things - support the inline assembly used in FFmpeg.
+not - among other things - support the inline assembly used in Libav.
 If you wish to use MSVC++ for your
 project then you can link the MSVC++ code with libav* as long as
 you compile the latter with a working C compiler. For more information, see
-the @emph{Microsoft Visual C++ compatibility} section in the FFmpeg
+the @emph{Microsoft Visual C++ compatibility} section in the Libav
 documentation.
 
-There have been efforts to make FFmpeg compatible with MSVC++ in the
+There have been efforts to make Libav compatible with MSVC++ in the
 past. However, they have all been rejected as too intrusive, especially
 since MinGW does the job adequately. None of the core developers
 work with MSVC++ and thus this item is low priority. Should you find
@@ -398,13 +398,13 @@ the silver bullet that solves this problem, feel free to shoot it at us.
 
 We strongly recommend you to move over from MSVC++ to MinGW tools.
 
-@section Can I use FFmpeg or libavcodec under Windows?
+@section Can I use Libav or libavcodec under Windows?
 
-Yes, but the Cygwin or MinGW tools @emph{must} be used to compile FFmpeg.
-Read the @emph{Windows} section in the FFmpeg documentation to find more
+Yes, but the Cygwin or MinGW tools @emph{must} be used to compile Libav.
+Read the @emph{Windows} section in the Libav documentation to find more
 information.
 
-To get help and instructions for building FFmpeg under Windows, check out
+To get help and instructions for building Libav under Windows, check out
 the FFmpeg Windows Help Forum at
 @url{http://ffmpeg.arrozcru.org/}.
 
@@ -414,7 +414,7 @@ No. These tools are too bloated and they complicate the build.
 
 @section Why not rewrite ffmpeg in object-oriented C++?
 
-FFmpeg is already organized in a highly modular manner and does not need to
+Libav is already organized in a highly modular manner and does not need to
 be rewritten in a formal object language. Further, many of the developers
 favor straight C; it works for them. For more arguments on this matter,
 read "Programming Religion" at (@url{http://www.tux.org/lkml/#s15}).
@@ -441,16 +441,16 @@ the compilation failure then you are probably not qualified for this.
 
 @section I'm using libavcodec from within my C++ application but the linker complains about missing symbols which seem to be available.
 
-FFmpeg is a pure C project, so to use the libraries within your C++ application
+Libav is a pure C project, so to use the libraries within your C++ application
 you need to explicitly state that you are using a C library. You can do this by
-encompassing your FFmpeg includes using @code{extern "C"}.
+encompassing your Libav includes using @code{extern "C"}.
 
 See @url{http://www.parashift.com/c++-faq-lite/mixing-c-and-cpp.html#faq-32.3}
 
 @section I have a file in memory / a API different from *open/*read/ libc how do I use it with libavformat?
 
 You have to implement a URLProtocol, see @file{libavformat/file.c} in
-FFmpeg and @file{libmpdemux/demux_lavf.c} in MPlayer sources.
+Libav and @file{libmpdemux/demux_lavf.c} in MPlayer sources.
 
 @section I get "No compatible shell script interpreter found." in MSys.
 
diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi
index f0f3b65084..bc30ba3d75 100644
--- a/doc/ffmpeg.texi
+++ b/doc/ffmpeg.texi
@@ -735,7 +735,7 @@ A preset file contains a sequence of @var{option}=@var{value} pairs,
 one for each line, specifying a sequence of options which would be
 awkward to specify on the command line. Lines starting with the hash
 ('#') character are ignored and are used to provide comments. Check
-the @file{ffpresets} directory in the FFmpeg source tree for examples.
+the @file{ffpresets} directory in the Libav source tree for examples.
 
 Preset files are specified with the @code{vpre}, @code{apre},
 @code{spre}, and @code{fpre} options. The @code{fpre} option takes the
@@ -997,11 +997,11 @@ file to which you want to add them.
 @settitle FFmpeg video converter
 
 @c man begin SEEALSO
-ffplay(1), ffprobe(1), ffserver(1) and the FFmpeg HTML documentation
+ffplay(1), ffprobe(1), ffserver(1) and the Libav HTML documentation
 @c man end
 
 @c man begin AUTHORS
-The FFmpeg developers
+The Libav developers
 @c man end
 
 @end ignore
diff --git a/doc/ffplay.texi b/doc/ffplay.texi
index e0518b859e..6199e6d269 100644
--- a/doc/ffplay.texi
+++ b/doc/ffplay.texi
@@ -20,9 +20,9 @@ ffplay [options] @file{input_file}
 @chapter Description
 @c man begin DESCRIPTION
 
-FFplay is a very simple and portable media player using the FFmpeg
+FFplay is a very simple and portable media player using the Libav
 libraries and the SDL library. It is mostly used as a testbed for the
-various FFmpeg APIs.
+various Libav APIs.
 @c man end
 
 @chapter Options
@@ -169,11 +169,11 @@ Seek to percentage in file corresponding to fraction of width.
 @settitle FFplay media player
 
 @c man begin SEEALSO
-ffmpeg(1), ffprobe(1), ffserver(1) and the FFmpeg HTML documentation
+ffmpeg(1), ffprobe(1), ffserver(1) and the Libav HTML documentation
 @c man end
 
 @c man begin AUTHORS
-The FFmpeg developers
+The Libav developers
 @c man end
 
 @end ignore
diff --git a/doc/ffprobe.texi b/doc/ffprobe.texi
index de65eee664..b775f558dd 100644
--- a/doc/ffprobe.texi
+++ b/doc/ffprobe.texi
@@ -122,11 +122,11 @@ with name "STREAM".
 @settitle FFprobe media prober
 
 @c man begin SEEALSO
-ffmpeg(1), ffplay(1), ffserver(1) and the FFmpeg HTML documentation
+ffmpeg(1), ffplay(1), ffserver(1) and the Libav HTML documentation
 @c man end
 
 @c man begin AUTHORS
-The FFmpeg developers
+The Libav developers
 @c man end
 
 @end ignore
diff --git a/doc/ffserver.texi b/doc/ffserver.texi
index 0cab3c8a98..021b237de5 100644
--- a/doc/ffserver.texi
+++ b/doc/ffserver.texi
@@ -266,11 +266,11 @@ rather than as a daemon.
 @c man begin SEEALSO
 
 ffmpeg(1), ffplay(1), ffprobe(1), the @file{ffmpeg/doc/ffserver.conf}
-example and the FFmpeg HTML documentation
+example and the Libav HTML documentation
 @c man end
 
 @c man begin AUTHORS
-The FFmpeg developers
+The Libav developers
 @c man end
 
 @end ignore
diff --git a/doc/fftools-common-opts.texi b/doc/fftools-common-opts.texi
index d72ca5cc00..3a1cb3b23c 100644
--- a/doc/fftools-common-opts.texi
+++ b/doc/fftools-common-opts.texi
@@ -88,6 +88,6 @@ can be disabled setting the environment variable
 @env{FFMPEG_FORCE_NOCOLOR} or @env{NO_COLOR}, or can be forced setting
 the environment variable @env{FFMPEG_FORCE_COLOR}.
 The use of the environment variable @env{NO_COLOR} is deprecated and
-will be dropped in a following FFmpeg version.
+will be dropped in a following Libav version.
 
 @end table
diff --git a/doc/filters.texi b/doc/filters.texi
index 25be8682b0..0744fb7a93 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -92,7 +92,7 @@ Follows a BNF description for the filtergraph syntax:
 @chapter Audio Filters
 @c man begin AUDIO FILTERS
 
-When you configure your FFmpeg build, you can disable any of the
+When you configure your Libav build, you can disable any of the
 existing filters using --disable-filters.
 The configure output will show the audio filters included in your
 build.
@@ -155,7 +155,7 @@ tools.
 @chapter Video Filters
 @c man begin VIDEO FILTERS
 
-When you configure your FFmpeg build, you can disable any of the
+When you configure your Libav build, you can disable any of the
 existing filters using --disable-filters.
 The configure output will show the video filters included in your
 build.
@@ -531,7 +531,7 @@ format=yuv420p:yuv444p:yuv410p
 Apply a frei0r effect to the input video.
 
 To enable compilation of this filter you need to install the frei0r
-header and configure FFmpeg with --enable-frei0r.
+header and configure Libav with --enable-frei0r.
 
 The filter supports the syntax:
 @example
@@ -669,7 +669,7 @@ Pass the video source unchanged to the output.
 Apply video transform using libopencv.
 
 To enable this filter install libopencv library and headers and
-configure FFmpeg with --enable-libopencv.
+configure Libav with --enable-libopencv.
 
 The filter takes the parameters: @var{filter_name}@{:=@}@var{filter_params}.
 
@@ -1314,7 +1314,7 @@ timebase. The expression can contain the constants "PI", "E", "PHI",
 Provide a frei0r source.
 
 To enable compilation of this filter you need to install the frei0r
-header and configure FFmpeg with --enable-frei0r.
+header and configure Libav with --enable-frei0r.
 
 The source supports the syntax:
 @example
diff --git a/doc/general.texi b/doc/general.texi
index 080357a39d..cd06533fad 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -11,13 +11,13 @@
 
 @chapter external libraries
 
-FFmpeg can be hooked up with a number of external libraries to add support
+Libav can be hooked up with a number of external libraries to add support
 for more formats. None of them are used by default, their use has to be
 explicitly requested by passing the appropriate flags to @file{./configure}.
 
 @section OpenCORE AMR
 
-FFmpeg can make use of the OpenCORE libraries for AMR-NB
+Libav can make use of the OpenCORE libraries for AMR-NB
 decoding/encoding and AMR-WB decoding.
 
 Go to @url{http://sourceforge.net/projects/opencore-amr/} and follow the instructions for
@@ -27,7 +27,7 @@ installing the libraries. Then pass @code{--enable-libopencore-amrnb} and/or
 Note that OpenCORE is under the Apache License 2.0 (see
 @url{http://www.apache.org/licenses/LICENSE-2.0} for details), which is
 incompatible with the LGPL version 2.1 and GPL version 2. You have to
-upgrade FFmpeg's license to LGPL version 3 (or if you have enabled
+upgrade Libav's license to LGPL version 3 (or if you have enabled
 GPL components, GPL version 3) to use it.
 
 
@@ -37,7 +37,7 @@ You can use the @code{-formats} and @code{-codecs} options to have an exhaustive
 
 @section File Formats
 
-FFmpeg supports the following file formats through the @code{libavformat}
+Libav supports the following file formats through the @code{libavformat}
 library:
 
 @multitable @columnfractions .4 .1 .1 .4
@@ -751,18 +751,18 @@ Using a cross-compiler is preferred for various reasons.
 
 @subsection DJGPP
 
-FFmpeg cannot be compiled because of broken system headers, add
+Libav cannot be compiled because of broken system headers, add
 @code{--extra-cflags=-U__STRICT_ANSI__} to the configure options as a
 workaround.
 
 @section OS/2
 
-For information about compiling FFmpeg on OS/2 see
+For information about compiling Libav on OS/2 see
 @url{http://www.edm2.com/index.php/FFmpeg}.
 
 @section Unix-like
 
-Some parts of FFmpeg cannot be built with version 2.15 of the GNU
+Some parts of Libav cannot be built with version 2.15 of the GNU
 assembler which is still provided by a few AMD64 distributions. To
 make sure your compiler really uses the required version of gas
 after a binutils upgrade, run:
@@ -777,7 +777,7 @@ to configure.
 
 @subsection BSD
 
-BSD make will not build FFmpeg, you need to install and use GNU Make
+BSD make will not build Libav, you need to install and use GNU Make
 (@file{gmake}).
 
 @subsubsection FreeBSD
@@ -790,7 +790,7 @@ getting the system headers fixed.
 
 @subsection (Open)Solaris
 
-GNU Make is required to build FFmpeg, so you have to invoke (@file{gmake}),
+GNU Make is required to build Libav, so you have to invoke (@file{gmake}),
 standard Solaris Make will not work. When building with a non-c99 front-end
 (gcc, generic suncc) add either @code{--extra-libs=/usr/lib/values-xpg6.o}
 or @code{--extra-libs=/usr/lib/64/values-xpg6.o} to the configure options
@@ -808,22 +808,22 @@ bash ./configure
 MacOS X on PowerPC or ARM (iPhone) requires a preprocessor from
 @url{http://github.com/yuvi/gas-preprocessor} to build the optimized
 assembler functions. Just download the Perl script and put it somewhere
-in your PATH, FFmpeg's configure will pick it up automatically.
+in your PATH, Libav's configure will pick it up automatically.
 
 @section Windows
 
-To get help and instructions for building FFmpeg under Windows, check out
+To get help and instructions for building Libav under Windows, check out
 the FFmpeg Windows Help Forum at
 @url{http://ffmpeg.arrozcru.org/}.
 
 @subsection Native Windows compilation
 
-FFmpeg can be built to run natively on Windows using the MinGW tools. Install
+Libav can be built to run natively on Windows using the MinGW tools. Install
 the latest versions of MSYS and MinGW from @url{http://www.mingw.org/}.
 You can find detailed installation
 instructions in the download section and the FAQ.
 
-FFmpeg does not build out-of-the-box with the packages the automated MinGW
+Libav does not build out-of-the-box with the packages the automated MinGW
 installer provides. It also requires coreutils to be installed and many other
 packages updated to the latest version. The minimum version for some packages
 are listed below:
@@ -835,7 +835,7 @@ are listed below:
 @item mingw-runtime 3.15
 @end itemize
 
-FFmpeg automatically passes @code{-fno-common} to the compiler to work around
+Libav automatically passes @code{-fno-common} to the compiler to work around
 a GCC bug (see @url{http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37216}).
 
 Within the MSYS shell, configure and make with:
@@ -866,14 +866,14 @@ Edit the @file{bin/sdl-config} script so that it points to the correct prefix
 where SDL was installed. Verify that @file{sdl-config} can be launched from
 the MSYS command line.
 
-@item By using @code{./configure --enable-shared} when configuring FFmpeg,
+@item By using @code{./configure --enable-shared} when configuring Libav,
 you can build libavutil, libavcodec and libavformat as DLLs.
 
 @end itemize
 
 @subsection Microsoft Visual C++ compatibility
 
-As stated in the FAQ, FFmpeg will not compile under MSVC++. However, if you
+As stated in the FAQ, Libav will not compile under MSVC++. However, if you
 want to use the libav* libraries in your own applications, you can still
 compile those applications using MSVC++. But the libav* libraries you link
 to @emph{must} be built with MinGW. However, you will not be able to debug
@@ -881,13 +881,13 @@ inside the libav* libraries, since MSVC++ does not recognize the debug
 symbols generated by GCC.
 We strongly recommend you to move over from MSVC++ to MinGW tools.
 
-This description of how to use the FFmpeg libraries with MSVC++ is based on
+This description of how to use the Libav libraries with MSVC++ is based on
 Microsoft Visual C++ 2005 Express Edition. If you have a different version,
 you might have to modify the procedures slightly.
 
 @subsubsection Using static libraries
 
-Assuming you have just built and installed FFmpeg in @file{/usr/local}.
+Assuming you have just built and installed Libav in @file{/usr/local}.
 
 @enumerate
 
@@ -898,13 +898,13 @@ Application Wizard, uncheck the "Precompiled headers" option.
 @item Write the source code for your application, or, for testing, just
 copy the code from an existing sample application into the source file
 that MSVC++ has already created for you. For example, you can copy
-@file{libavformat/output-example.c} from the FFmpeg distribution.
+@file{libavformat/output-example.c} from the Libav distribution.
 
 @item Open the "Project / Properties" dialog box. In the "Configuration"
 combo box, select "All Configurations" so that the changes you make will
 affect both debug and release builds. In the tree view on the left hand
 side, select "C/C++ / General", then edit the "Additional Include
-Directories" setting to contain the path where the FFmpeg includes were
+Directories" setting to contain the path where the Libav includes were
 installed (i.e. @file{c:\msys\1.0\local\include}).
 Do not add MinGW's include directory here, or the include files will
 conflict with MSVC's.
@@ -912,7 +912,7 @@ conflict with MSVC's.
 @item Still in the "Project / Properties" dialog box, select
 "Linker / General" from the tree view and edit the
 "Additional Library Directories" setting to contain the @file{lib}
-directory where FFmpeg was installed (i.e. @file{c:\msys\1.0\local\lib}),
+directory where Libav was installed (i.e. @file{c:\msys\1.0\local\lib}),
 the directory where MinGW libs are installed (i.e. @file{c:\mingw\lib}),
 and the directory where MinGW's GCC libs are installed
 (i.e. @file{C:\mingw\lib\gcc\mingw32\4.2.1-sjlj}). Then select
@@ -929,13 +929,13 @@ set to "Multi-threaded DLL".
 
 @item Click "OK" to close the "Project / Properties" dialog box.
 
-@item MSVC++ lacks some C99 header files that are fundamental for FFmpeg.
+@item MSVC++ lacks some C99 header files that are fundamental for Libav.
 Get msinttypes from @url{http://code.google.com/p/msinttypes/downloads/list}
 and install it in MSVC++'s include directory
 (i.e. @file{C:\Program Files\Microsoft Visual Studio 8\VC\include}).
 
 @item MSVC++ also does not understand the @code{inline} keyword used by
-FFmpeg, so you must add this line before @code{#include}ing libav*:
+Libav, so you must add this line before @code{#include}ing libav*:
 @example
 #define inline _inline
 @end example
@@ -968,10 +968,10 @@ and run @file{c:\msys\1.0\msys.bat} from there.
 @item Within the MSYS shell, run @code{lib.exe}. If you get a help message
 from @file{Microsoft (R) Library Manager}, this means your environment
 variables are set up correctly, the @file{Microsoft (R) Library Manager}
-is on the path and will be used by FFmpeg to create
+is on the path and will be used by Libav to create
 MSVC++-compatible import libraries.
 
-@item Build FFmpeg with
+@item Build Libav with
 
 @example
 ./configure --enable-shared --enable-memalign-hack
@@ -1000,7 +1000,7 @@ of DLL files, but the ones that are actually used to run your application
 are the ones with a major version number in their filenames
 (i.e. @file{avcodec-51.dll}).
 
-FFmpeg headers do not declare global data for Windows DLLs through the usual
+Libav headers do not declare global data for Windows DLLs through the usual
 dllexport/dllimport interface. Such data will be exported properly while
 building, but to use them in your MSVC++ code you will have to edit the
 appropriate headers and mark the data as dllimport. For example, in
@@ -1014,14 +1014,14 @@ extern __declspec(dllimport) const AVPixFmtDescriptor av_pix_fmt_descriptors[];
 You must use the MinGW cross compilation tools available at
 @url{http://www.mingw.org/}.
 
-Then configure FFmpeg with the following options:
+Then configure Libav with the following options:
 @example
 ./configure --target-os=mingw32 --cross-prefix=i386-mingw32msvc-
 @end example
 (you can change the cross-prefix according to the prefix chosen for the
 MinGW tools).
 
-Then you can easily test FFmpeg with Wine
+Then you can easily test Libav with Wine
 (@url{http://www.winehq.com/}).
 
 @subsection Compilation under Cygwin
@@ -1055,7 +1055,7 @@ shared libraries:
 ./configure --enable-shared --disable-static --extra-cflags=-fno-reorder-functions
 @end example
 
-If you want to build FFmpeg with additional libraries, download Cygwin
+If you want to build Libav with additional libraries, download Cygwin
 "Devel" packages for Ogg and Vorbis from any Cygwin packages repository:
 @example
 libogg-devel, libvorbis-devel
diff --git a/doc/git-howto.txt b/doc/git-howto.txt
index 8b1fc14149..65eed426fe 100644
--- a/doc/git-howto.txt
+++ b/doc/git-howto.txt
@@ -28,9 +28,9 @@ Consult these resources whenever you have problems, they are quite exhaustive.
 You do not need a special username or password.
 All you need is to provide a ssh public key to the Git server admin.
 
-What follows now is a basic introduction to Git and some FFmpeg-specific
+What follows now is a basic introduction to Git and some Libav-specific
 guidelines. Read it at least once, if you are granted commit privileges to the
-FFmpeg project you are expected to be familiar with these rules.
+Libav project you are expected to be familiar with these rules.
 
 
 
@@ -46,11 +46,11 @@ I. BASICS:
 
     git clone git://git.videolan.org/ffmpeg <target>
 
-  This will put the FFmpeg sources into the directory <target>.
+  This will put the Libav sources into the directory <target>.
 
     git clone git@git.videolan.org:ffmpeg <target>
 
-  This will put the FFmpeg sources into the directory <target> and let
+  This will put the Libav sources into the directory <target> and let
   you push back your changes to the remote repository.
 
 
@@ -72,7 +72,7 @@ I. BASICS:
 
   fetches the changes from the main repository and replays your local commits
   over it. This is required to keep all your local changes at the top of
-  FFmpeg's master tree. The master tree will reject pushes with merge commits.
+  Libav's master tree. The master tree will reject pushes with merge commits.
 
 
 3. Adding/removing files/directories:
diff --git a/doc/indevs.texi b/doc/indevs.texi
index 1cd2dd63cb..f1d69f73da 100644
--- a/doc/indevs.texi
+++ b/doc/indevs.texi
@@ -1,10 +1,10 @@
 @chapter Input Devices
 @c man begin INPUT DEVICES
 
-Input devices are configured elements in FFmpeg which allow to access
+Input devices are configured elements in Libav which allow to access
 the data coming from a multimedia device attached to your system.
 
-When you configure your FFmpeg build, all the supported input devices
+When you configure your Libav build, all the supported input devices
 are enabled by default. You can list all available ones using the
 configure option "--list-indevs".
 
@@ -95,7 +95,7 @@ A JACK input device creates one or more JACK writable clients, one for
 each audio channel, with name @var{client_name}:input_@var{N}, where
 @var{client_name} is the name provided by the application, and @var{N}
 is a number which identifies the channel.
-Each writable client will send the acquired data to the FFmpeg input
+Each writable client will send the acquired data to the Libav input
 device.
 
 Once you have created one or more JACK readable clients, you need to
diff --git a/doc/issue_tracker.txt b/doc/issue_tracker.txt
index e5a74db001..d92ab4221b 100644
--- a/doc/issue_tracker.txt
+++ b/doc/issue_tracker.txt
@@ -1,11 +1,11 @@
-FFmpeg's bug/patch/feature request tracker manual
-=================================================
+Libav's bug/patch/feature request tracker manual
+================================================
 
 NOTE: This is a draft.
 
 Overview:
 ---------
-FFmpeg uses Roundup for tracking issues, new issues and changes to
+Libav uses Roundup for tracking issues, new issues and changes to
 existing issues can be done through a web interface and through email.
 It is possible to subscribe to individual issues by adding yourself to the
 nosy list or to subscribe to the ffmpeg-issues mailing list which receives
@@ -60,7 +60,7 @@ critical
     No feature request can be critical.
 
 important
-    Bugs which make FFmpeg unusable for a significant number of users, and
+    Bugs which make Libav unusable for a significant number of users, and
     patches fixing them.
     Examples here might be completely broken MPEG-4 decoding or a build issue
     on Linux.
@@ -81,7 +81,7 @@ minor
 wish
     Something that is desirable to have but that there is no urgency at
     all to implement, e.g. something completely cosmetic like a website
-    restyle or a personalized doxy template or the FFmpeg logo.
+    restyle or a personalized doxy template or the Libav logo.
     This priority is not valid for bugs.
 
 
diff --git a/doc/libavfilter.texi b/doc/libavfilter.texi
index f0b448259a..6d5698b6be 100644
--- a/doc/libavfilter.texi
+++ b/doc/libavfilter.texi
@@ -11,10 +11,10 @@
 
 @chapter Introduction
 
-Libavfilter is the filtering API of FFmpeg. It is the substitute of the
+Libavfilter is the filtering API of Libav. It is the substitute of the
 now deprecated 'vhooks' and started as a Google Summer of Code project.
 
-Integrating libavfilter into the main FFmpeg repository is a work in
+Integrating libavfilter into the main Libav repository is a work in
 progress. If you wish to try the unfinished development code of
 libavfilter then check it out from the libavfilter repository into
 some directory of your choice by:
@@ -74,7 +74,7 @@ not have video output.
 
 @chapter graph2dot
 
-The @file{graph2dot} program included in the FFmpeg @file{tools}
+The @file{graph2dot} program included in the Libav @file{tools}
 directory can be used to parse a filter graph description and issue a
 corresponding textual representation in the dot language.
 
diff --git a/doc/metadata.texi b/doc/metadata.texi
index 2a285757cc..cfaf491c2d 100644
--- a/doc/metadata.texi
+++ b/doc/metadata.texi
@@ -1,7 +1,7 @@
 @chapter Metadata
 @c man begin METADATA
 
-FFmpeg is able to dump metadata from media files into a simple UTF-8-encoded
+Libav is able to dump metadata from media files into a simple UTF-8-encoded
 INI-like text file and then load it back using the metadata muxer/demuxer.
 
 The file format is as follows:
@@ -53,7 +53,7 @@ A ffmetadata file might look like this:
 ;FFMETADATA1
 title=bike\\shed
 ;this is a comment
-artist=FFmpeg troll team
+artist=Libav troll team
 
 [CHAPTER]
 TIMEBASE=1/1000
diff --git a/doc/multithreading.txt b/doc/multithreading.txt
index a1068425cd..b72bc16079 100644
--- a/doc/multithreading.txt
+++ b/doc/multithreading.txt
@@ -1,7 +1,7 @@
-FFmpeg multithreading methods
+Libav multithreading methods
 ==============================================
 
-FFmpeg provides two methods for multithreading codecs.
+Libav provides two methods for multithreading codecs.
 
 Slice threading decodes multiple parts of a frame at the same time, using
 AVCodecContext execute() and execute2().
diff --git a/doc/muxers.texi b/doc/muxers.texi
index e7cfc4a9bc..ead986914c 100644
--- a/doc/muxers.texi
+++ b/doc/muxers.texi
@@ -1,10 +1,10 @@
 @chapter Muxers
 @c man begin MUXERS
 
-Muxers are configured elements in FFmpeg which allow writing
+Muxers are configured elements in Libav which allow writing
 multimedia streams to a particular type of file.
 
-When you configure your FFmpeg build, all the supported muxers
+When you configure your Libav build, all the supported muxers
 are enabled by default. You can list all available muxers using the
 configure option @code{--list-muxers}.
 
diff --git a/doc/optimization.txt b/doc/optimization.txt
index 08954f9973..70df5f06d5 100644
--- a/doc/optimization.txt
+++ b/doc/optimization.txt
@@ -201,7 +201,7 @@ Inline asm vs. external asm
 ---------------------------
 Both inline asm (__asm__("..") in a .c file, handled by a compiler such as gcc)
 and external asm (.s or .asm files, handled by an assembler such as yasm/nasm)
-are accepted in FFmpeg. Which one to use differs per specific case.
+are accepted in Libav. Which one to use differs per specific case.
 
 - if your code is intended to be inlined in a C function, inline asm is always
    better, because external asm cannot be inlined
diff --git a/doc/outdevs.texi b/doc/outdevs.texi
index 3c0acee984..8658202dc6 100644
--- a/doc/outdevs.texi
+++ b/doc/outdevs.texi
@@ -1,10 +1,10 @@
 @chapter Output Devices
 @c man begin OUTPUT DEVICES
 
-Output devices are configured elements in FFmpeg which allow to write
+Output devices are configured elements in Libav which allow to write
 multimedia data to an output device attached to your system.
 
-When you configure your FFmpeg build, all the supported output devices
+When you configure your Libav build, all the supported output devices
 are enabled by default. You can list all available ones using the
 configure option "--list-outdevs".
 
diff --git a/doc/protocols.texi b/doc/protocols.texi
index 5655b10180..a17d66362a 100644
--- a/doc/protocols.texi
+++ b/doc/protocols.texi
@@ -1,10 +1,10 @@
 @chapter Protocols
 @c man begin PROTOCOLS
 
-Protocols are configured elements in FFmpeg which allow to access
+Protocols are configured elements in Libav which allow to access
 resources which require the use of a particular protocol.
 
-When you configure your FFmpeg build, all the supported protocols are
+When you configure your Libav build, all the supported protocols are
 enabled by default. You can list all available ones using the
 configure option "--list-protocols".
 
@@ -25,8 +25,9 @@ Read Apple HTTP Live Streaming compliant segmented stream as
 a uniform one. The M3U8 playlists describing the segments can be
 remote HTTP resources or local files, accessed using the standard
 file protocol.
-HTTP is default, specific protocol can be declared using the "+"
-specifier.
+HTTP is default, specific protocol can be declared by specifying
+"+@var{proto}" after the applehttp URI scheme name, where @var{proto}
+is either "file" or "http".
 
 @example
 applehttp://host/path/to/remote/resource.m3u8
@@ -34,7 +35,6 @@ applehttp+http://host/path/to/remote/resource.m3u8
 applehttp+file://path/to/local/resource.m3u8
 @end example
 
-
 @section concat
 
 Physical concatenation protocol.
diff --git a/doc/soc.txt b/doc/soc.txt
index 79d77d1cd7..e45bd6ce3b 100644
--- a/doc/soc.txt
+++ b/doc/soc.txt
@@ -8,9 +8,9 @@ it's a little late for this year's soc (2006).
 
 The Goal:
 Our goal in respect to soc is and must be of course exactly one thing and
-that is to improve FFmpeg, to reach this goal, code must
+that is to improve Libav, to reach this goal, code must
 * conform to the development policy and patch submission guidelines
-* must improve FFmpeg somehow (faster, smaller, "better",
+* must improve Libav somehow (faster, smaller, "better",
   more codecs supported, fewer bugs, cleaner, ...)
 
 for mentors and other developers to help students to reach that goal it is
@@ -20,5 +20,5 @@ easy reviewable that again leads us to:
 * separation of cosmetic from non-cosmetic changes (this is almost entirely
   ignored by mentors and students in soc 2006 which might lead to a suprise
   when the code will be reviewed at the end before a possible inclusion in
-  FFmpeg, individual changes were generally not reviewable due to cosmetics).
+  Libav, individual changes were generally not reviewable due to cosmetics).
 * frequent commits, so that comments can be provided early
diff --git a/ffserver.c b/ffserver.c
index e5c4ac23d8..db0cd127e2 100644
--- a/ffserver.c
+++ b/ffserver.c
@@ -1861,7 +1861,7 @@ static void fmt_bytecount(AVIOContext *pb, int64_t count)
 
     for (s = suffix; count >= 100000 && s[1]; count /= 1000, s++);
 
-    url_fprintf(pb, "%"PRId64"%c", count, *s);
+    avio_printf(pb, "%"PRId64"%c", count, *s);
 }
 
 static void compute_status(HTTPContext *c)
@@ -1880,20 +1880,20 @@ static void compute_status(HTTPContext *c)
         return;
     }
 
-    url_fprintf(pb, "HTTP/1.0 200 OK\r\n");
-    url_fprintf(pb, "Content-type: %s\r\n", "text/html");
-    url_fprintf(pb, "Pragma: no-cache\r\n");
-    url_fprintf(pb, "\r\n");
+    avio_printf(pb, "HTTP/1.0 200 OK\r\n");
+    avio_printf(pb, "Content-type: %s\r\n", "text/html");
+    avio_printf(pb, "Pragma: no-cache\r\n");
+    avio_printf(pb, "\r\n");
 
-    url_fprintf(pb, "<html><head><title>%s Status</title>\n", program_name);
+    avio_printf(pb, "<html><head><title>%s Status</title>\n", program_name);
     if (c->stream->feed_filename[0])
-        url_fprintf(pb, "<link rel=\"shortcut icon\" href=\"%s\">\n", c->stream->feed_filename);
-    url_fprintf(pb, "</head>\n<body>");
-    url_fprintf(pb, "<h1>%s Status</h1>\n", program_name);
+        avio_printf(pb, "<link rel=\"shortcut icon\" href=\"%s\">\n", c->stream->feed_filename);
+    avio_printf(pb, "</head>\n<body>");
+    avio_printf(pb, "<h1>%s Status</h1>\n", program_name);
     /* format status */
-    url_fprintf(pb, "<h2>Available Streams</h2>\n");
-    url_fprintf(pb, "<table cellspacing=0 cellpadding=4>\n");
-    url_fprintf(pb, "<tr><th valign=top>Path<th align=left>Served<br>Conns<th><br>bytes<th valign=top>Format<th>Bit rate<br>kbits/s<th align=left>Video<br>kbits/s<th><br>Codec<th align=left>Audio<br>kbits/s<th><br>Codec<th align=left valign=top>Feed\n");
+    avio_printf(pb, "<h2>Available Streams</h2>\n");
+    avio_printf(pb, "<table cellspacing=0 cellpadding=4>\n");
+    avio_printf(pb, "<tr><th valign=top>Path<th align=left>Served<br>Conns<th><br>bytes<th valign=top>Format<th>Bit rate<br>kbits/s<th align=left>Video<br>kbits/s<th><br>Codec<th align=left>Audio<br>kbits/s<th><br>Codec<th align=left valign=top>Feed\n");
     stream = first_stream;
     while (stream != NULL) {
         char sfilename[1024];
@@ -1921,9 +1921,9 @@ static void compute_status(HTTPContext *c)
                 }
             }
 
-            url_fprintf(pb, "<tr><td><a href=\"/%s\">%s</a> ",
+            avio_printf(pb, "<tr><td><a href=\"/%s\">%s</a> ",
                          sfilename, stream->filename);
-            url_fprintf(pb, "<td align=right> %d <td align=right> ",
+            avio_printf(pb, "<td align=right> %d <td align=right> ",
                         stream->conns_served);
             fmt_bytecount(pb, stream->bytes_served);
             switch(stream->stream_type) {
@@ -1962,33 +1962,33 @@ static void compute_status(HTTPContext *c)
                             abort();
                         }
                     }
-                    url_fprintf(pb, "<td align=center> %s <td align=right> %d <td align=right> %d <td> %s %s <td align=right> %d <td> %s %s",
+                    avio_printf(pb, "<td align=center> %s <td align=right> %d <td align=right> %d <td> %s %s <td align=right> %d <td> %s %s",
                                  stream->fmt->name,
                                  stream->bandwidth,
                                  video_bit_rate / 1000, video_codec_name, video_codec_name_extra,
                                  audio_bit_rate / 1000, audio_codec_name, audio_codec_name_extra);
                     if (stream->feed)
-                        url_fprintf(pb, "<td>%s", stream->feed->filename);
+                        avio_printf(pb, "<td>%s", stream->feed->filename);
                     else
-                        url_fprintf(pb, "<td>%s", stream->feed_filename);
-                    url_fprintf(pb, "\n");
+                        avio_printf(pb, "<td>%s", stream->feed_filename);
+                    avio_printf(pb, "\n");
                 }
                 break;
             default:
-                url_fprintf(pb, "<td align=center> - <td align=right> - <td align=right> - <td><td align=right> - <td>\n");
+                avio_printf(pb, "<td align=center> - <td align=right> - <td align=right> - <td><td align=right> - <td>\n");
                 break;
             }
         }
         stream = stream->next;
     }
-    url_fprintf(pb, "</table>\n");
+    avio_printf(pb, "</table>\n");
 
     stream = first_stream;
     while (stream != NULL) {
         if (stream->feed == stream) {
-            url_fprintf(pb, "<h2>Feed %s</h2>", stream->filename);
+            avio_printf(pb, "<h2>Feed %s</h2>", stream->filename);
             if (stream->pid) {
-                url_fprintf(pb, "Running as pid %d.\n", stream->pid);
+                avio_printf(pb, "Running as pid %d.\n", stream->pid);
 
 #if defined(linux) && !defined(CONFIG_NOCUTILS)
                 {
@@ -2007,7 +2007,7 @@ static void compute_status(HTTPContext *c)
 
                         if (fscanf(pid_stat, "%10s %64s", cpuperc,
                                    cpuused) == 2) {
-                            url_fprintf(pb, "Currently using %s%% of the cpu. Total time used %s.\n",
+                            avio_printf(pb, "Currently using %s%% of the cpu. Total time used %s.\n",
                                          cpuperc, cpuused);
                         }
                         fclose(pid_stat);
@@ -2015,9 +2015,9 @@ static void compute_status(HTTPContext *c)
                 }
 #endif
 
-                url_fprintf(pb, "<p>");
+                avio_printf(pb, "<p>");
             }
-            url_fprintf(pb, "<table cellspacing=0 cellpadding=4><tr><th>Stream<th>type<th>kbits/s<th align=left>codec<th align=left>Parameters\n");
+            avio_printf(pb, "<table cellspacing=0 cellpadding=4><tr><th>Stream<th>type<th>kbits/s<th align=left>codec<th align=left>Parameters\n");
 
             for (i = 0; i < stream->nb_streams; i++) {
                 AVStream *st = stream->streams[i];
@@ -2040,26 +2040,26 @@ static void compute_status(HTTPContext *c)
                 default:
                     abort();
                 }
-                url_fprintf(pb, "<tr><td align=right>%d<td>%s<td align=right>%d<td>%s<td>%s\n",
+                avio_printf(pb, "<tr><td align=right>%d<td>%s<td align=right>%d<td>%s<td>%s\n",
                         i, type, st->codec->bit_rate/1000, codec ? codec->name : "", parameters);
             }
-            url_fprintf(pb, "</table>\n");
+            avio_printf(pb, "</table>\n");
 
         }
         stream = stream->next;
     }
 
     /* connection status */
-    url_fprintf(pb, "<h2>Connection Status</h2>\n");
+    avio_printf(pb, "<h2>Connection Status</h2>\n");
 
-    url_fprintf(pb, "Number of connections: %d / %d<br>\n",
+    avio_printf(pb, "Number of connections: %d / %d<br>\n",
                  nb_connections, nb_max_connections);
 
-    url_fprintf(pb, "Bandwidth in use: %"PRIu64"k / %"PRIu64"k<br>\n",
+    avio_printf(pb, "Bandwidth in use: %"PRIu64"k / %"PRIu64"k<br>\n",
                  current_bandwidth, max_bandwidth);
 
-    url_fprintf(pb, "<table>\n");
-    url_fprintf(pb, "<tr><th>#<th>File<th>IP<th>Proto<th>State<th>Target bits/sec<th>Actual bits/sec<th>Bytes transferred\n");
+    avio_printf(pb, "<table>\n");
+    avio_printf(pb, "<tr><th>#<th>File<th>IP<th>Proto<th>State<th>Target bits/sec<th>Actual bits/sec<th>Bytes transferred\n");
     c1 = first_http_ctx;
     i = 0;
     while (c1 != NULL) {
@@ -2078,7 +2078,7 @@ static void compute_status(HTTPContext *c)
 
         i++;
         p = inet_ntoa(c1->from_addr.sin_addr);
-        url_fprintf(pb, "<tr><td><b>%d</b><td>%s%s<td>%s<td>%s<td>%s<td align=right>",
+        avio_printf(pb, "<tr><td><b>%d</b><td>%s%s<td>%s<td>%s<td>%s<td align=right>",
                     i,
                     c1->stream ? c1->stream->filename : "",
                     c1->state == HTTPSTATE_RECEIVE_DATA ? "(input)" : "",
@@ -2086,20 +2086,20 @@ static void compute_status(HTTPContext *c)
                     c1->protocol,
                     http_state[c1->state]);
         fmt_bytecount(pb, bitrate);
-        url_fprintf(pb, "<td align=right>");
+        avio_printf(pb, "<td align=right>");
         fmt_bytecount(pb, compute_datarate(&c1->datarate, c1->data_count) * 8);
-        url_fprintf(pb, "<td align=right>");
+        avio_printf(pb, "<td align=right>");
         fmt_bytecount(pb, c1->data_count);
-        url_fprintf(pb, "\n");
+        avio_printf(pb, "\n");
         c1 = c1->next;
     }
-    url_fprintf(pb, "</table>\n");
+    avio_printf(pb, "</table>\n");
 
     /* date */
     ti = time(NULL);
     p = ctime(&ti);
-    url_fprintf(pb, "<hr size=1 noshade>Generated at %s", p);
-    url_fprintf(pb, "</body>\n</html>\n");
+    avio_printf(pb, "<hr size=1 noshade>Generated at %s", p);
+    avio_printf(pb, "</body>\n</html>\n");
 
     len = url_close_dyn_buf(pb, &c->pb_buffer);
     c->buffer_ptr = c->pb_buffer;
@@ -2721,7 +2721,8 @@ static int http_receive_data(HTTPContext *c)
             if (!fmt_in)
                 goto fail;
 
-            url_open_buf(&pb, c->buffer, c->buffer_end - c->buffer, URL_RDONLY);
+            pb = avio_alloc_context(c->buffer, c->buffer_end - c->buffer,
+                                    0, NULL, NULL, NULL, NULL);
             pb->is_streamed = 1;
 
             if (av_open_input_stream(&s, pb, c->stream->feed_filename, fmt_in, NULL) < 0) {
@@ -2812,20 +2813,20 @@ static void rtsp_reply_header(HTTPContext *c, enum RTSPStatusCode error_number)
         break;
     }
 
-    url_fprintf(c->pb, "RTSP/1.0 %d %s\r\n", error_number, str);
-    url_fprintf(c->pb, "CSeq: %d\r\n", c->seq);
+    avio_printf(c->pb, "RTSP/1.0 %d %s\r\n", error_number, str);
+    avio_printf(c->pb, "CSeq: %d\r\n", c->seq);
 
     /* output GMT time */
     ti = time(NULL);
     tm = gmtime(&ti);
     strftime(buf2, sizeof(buf2), "%a, %d %b %Y %H:%M:%S", tm);
-    url_fprintf(c->pb, "Date: %s GMT\r\n", buf2);
+    avio_printf(c->pb, "Date: %s GMT\r\n", buf2);
 }
 
 static void rtsp_reply_error(HTTPContext *c, enum RTSPStatusCode error_number)
 {
     rtsp_reply_header(c, error_number);
-    url_fprintf(c->pb, "\r\n");
+    avio_printf(c->pb, "\r\n");
 }
 
 static int rtsp_parse_request(HTTPContext *c)
@@ -2970,10 +2971,10 @@ static int prepare_sdp_description(FFStream *stream, uint8_t **pbuffer,
 static void rtsp_cmd_options(HTTPContext *c, const char *url)
 {
 //    rtsp_reply_header(c, RTSP_STATUS_OK);
-    url_fprintf(c->pb, "RTSP/1.0 %d %s\r\n", RTSP_STATUS_OK, "OK");
-    url_fprintf(c->pb, "CSeq: %d\r\n", c->seq);
-    url_fprintf(c->pb, "Public: %s\r\n", "OPTIONS, DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE");
-    url_fprintf(c->pb, "\r\n");
+    avio_printf(c->pb, "RTSP/1.0 %d %s\r\n", RTSP_STATUS_OK, "OK");
+    avio_printf(c->pb, "CSeq: %d\r\n", c->seq);
+    avio_printf(c->pb, "Public: %s\r\n", "OPTIONS, DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE");
+    avio_printf(c->pb, "\r\n");
 }
 
 static void rtsp_cmd_describe(HTTPContext *c, const char *url)
@@ -3014,10 +3015,10 @@ static void rtsp_cmd_describe(HTTPContext *c, const char *url)
         return;
     }
     rtsp_reply_header(c, RTSP_STATUS_OK);
-    url_fprintf(c->pb, "Content-Base: %s/\r\n", url);
-    url_fprintf(c->pb, "Content-Type: application/sdp\r\n");
-    url_fprintf(c->pb, "Content-Length: %d\r\n", content_length);
-    url_fprintf(c->pb, "\r\n");
+    avio_printf(c->pb, "Content-Base: %s/\r\n", url);
+    avio_printf(c->pb, "Content-Type: application/sdp\r\n");
+    avio_printf(c->pb, "Content-Length: %d\r\n", content_length);
+    avio_printf(c->pb, "\r\n");
     avio_write(c->pb, content, content_length);
     av_free(content);
 }
@@ -3163,30 +3164,30 @@ static void rtsp_cmd_setup(HTTPContext *c, const char *url,
     /* now everything is OK, so we can send the connection parameters */
     rtsp_reply_header(c, RTSP_STATUS_OK);
     /* session ID */
-    url_fprintf(c->pb, "Session: %s\r\n", rtp_c->session_id);
+    avio_printf(c->pb, "Session: %s\r\n", rtp_c->session_id);
 
     switch(rtp_c->rtp_protocol) {
     case RTSP_LOWER_TRANSPORT_UDP:
         rtp_port = rtp_get_local_rtp_port(rtp_c->rtp_handles[stream_index]);
         rtcp_port = rtp_get_local_rtcp_port(rtp_c->rtp_handles[stream_index]);
-        url_fprintf(c->pb, "Transport: RTP/AVP/UDP;unicast;"
+        avio_printf(c->pb, "Transport: RTP/AVP/UDP;unicast;"
                     "client_port=%d-%d;server_port=%d-%d",
                     th->client_port_min, th->client_port_max,
                     rtp_port, rtcp_port);
         break;
     case RTSP_LOWER_TRANSPORT_TCP:
-        url_fprintf(c->pb, "Transport: RTP/AVP/TCP;interleaved=%d-%d",
+        avio_printf(c->pb, "Transport: RTP/AVP/TCP;interleaved=%d-%d",
                     stream_index * 2, stream_index * 2 + 1);
         break;
     default:
         break;
     }
     if (setup.transport_option[0] != '\0')
-        url_fprintf(c->pb, ";%s", setup.transport_option);
-    url_fprintf(c->pb, "\r\n");
+        avio_printf(c->pb, ";%s", setup.transport_option);
+    avio_printf(c->pb, "\r\n");
 
 
-    url_fprintf(c->pb, "\r\n");
+    avio_printf(c->pb, "\r\n");
 }
 
 
@@ -3248,8 +3249,8 @@ static void rtsp_cmd_play(HTTPContext *c, const char *url, RTSPMessageHeader *h)
     /* now everything is OK, so we can send the connection parameters */
     rtsp_reply_header(c, RTSP_STATUS_OK);
     /* session ID */
-    url_fprintf(c->pb, "Session: %s\r\n", rtp_c->session_id);
-    url_fprintf(c->pb, "\r\n");
+    avio_printf(c->pb, "Session: %s\r\n", rtp_c->session_id);
+    avio_printf(c->pb, "\r\n");
 }
 
 static void rtsp_cmd_pause(HTTPContext *c, const char *url, RTSPMessageHeader *h)
@@ -3273,8 +3274,8 @@ static void rtsp_cmd_pause(HTTPContext *c, const char *url, RTSPMessageHeader *h
     /* now everything is OK, so we can send the connection parameters */
     rtsp_reply_header(c, RTSP_STATUS_OK);
     /* session ID */
-    url_fprintf(c->pb, "Session: %s\r\n", rtp_c->session_id);
-    url_fprintf(c->pb, "\r\n");
+    avio_printf(c->pb, "Session: %s\r\n", rtp_c->session_id);
+    avio_printf(c->pb, "\r\n");
 }
 
 static void rtsp_cmd_teardown(HTTPContext *c, const char *url, RTSPMessageHeader *h)
@@ -3296,8 +3297,8 @@ static void rtsp_cmd_teardown(HTTPContext *c, const char *url, RTSPMessageHeader
     /* now everything is OK, so we can send the connection parameters */
     rtsp_reply_header(c, RTSP_STATUS_OK);
     /* session ID */
-    url_fprintf(c->pb, "Session: %s\r\n", session_id);
-    url_fprintf(c->pb, "\r\n");
+    avio_printf(c->pb, "Session: %s\r\n", session_id);
+    avio_printf(c->pb, "\r\n");
 }
 
 
diff --git a/libavcodec/aaccoder.c b/libavcodec/aaccoder.c
index 8063fb6cd4..79723c61ef 100644
--- a/libavcodec/aaccoder.c
+++ b/libavcodec/aaccoder.c
@@ -146,34 +146,34 @@ static av_always_inline float quantize_and_encode_band_cost_template(
             curidx *= range;
             curidx += quants[j] + off;
         }
-            curbits =  ff_aac_spectral_bits[cb-1][curidx];
-            vec     = &ff_aac_codebook_vectors[cb-1][curidx*dim];
-            if (BT_UNSIGNED) {
-                for (k = 0; k < dim; k++) {
-                    float t = fabsf(in[i+k]);
-                    float di;
-                    if (BT_ESC && vec[k] == 64.0f) { //FIXME: slow
-                        if (t >= CLIPPED_ESCAPE) {
-                            di = t - CLIPPED_ESCAPE;
-                            curbits += 21;
-                        } else {
-                            int c = av_clip(quant(t, Q), 0, 8191);
-                            di = t - c*cbrtf(c)*IQ;
-                            curbits += av_log2(c)*2 - 4 + 1;
-                        }
+        curbits =  ff_aac_spectral_bits[cb-1][curidx];
+        vec     = &ff_aac_codebook_vectors[cb-1][curidx*dim];
+        if (BT_UNSIGNED) {
+            for (k = 0; k < dim; k++) {
+                float t = fabsf(in[i+k]);
+                float di;
+                if (BT_ESC && vec[k] == 64.0f) { //FIXME: slow
+                    if (t >= CLIPPED_ESCAPE) {
+                        di = t - CLIPPED_ESCAPE;
+                        curbits += 21;
                     } else {
-                        di = t - vec[k]*IQ;
+                        int c = av_clip(quant(t, Q), 0, 8191);
+                        di = t - c*cbrtf(c)*IQ;
+                        curbits += av_log2(c)*2 - 4 + 1;
                     }
-                    if (vec[k] != 0.0f)
-                        curbits++;
-                    rd += di*di;
-                }
-            } else {
-                for (k = 0; k < dim; k++) {
-                    float di = in[i+k] - vec[k]*IQ;
-                    rd += di*di;
+                } else {
+                    di = t - vec[k]*IQ;
                 }
+                if (vec[k] != 0.0f)
+                    curbits++;
+                rd += di*di;
             }
+        } else {
+            for (k = 0; k < dim; k++) {
+                float di = in[i+k] - vec[k]*IQ;
+                rd += di*di;
+            }
+        }
         cost    += rd * lambda + curbits;
         resbits += curbits;
         if (cost >= uplim)
@@ -575,7 +575,7 @@ static void search_for_quantizers_anmr(AVCodecContext *avctx, AACEncContext *s,
         int qnrg = av_clip_uint8(log2f(sqrtf(qnrgf/qcnt))*4 - 31 + SCALE_ONE_POS - SCALE_DIV_512);
         q1 = qnrg + 30;
         q0 = qnrg - 30;
-    //av_log(NULL, AV_LOG_ERROR, "q0 %d, q1 %d\n", q0, q1);
+        //av_log(NULL, AV_LOG_ERROR, "q0 %d, q1 %d\n", q0, q1);
         if (q0 < q0low) {
             q1 += q0low - q0;
             q0  = q0low;
@@ -723,7 +723,7 @@ static void search_for_quantizers_twoloop(AVCodecContext *avctx,
             sce->zeroes[w*16+g] = !nz;
             if (nz)
                 minthr = FFMIN(minthr, uplim);
-            allz = FFMAX(allz, nz);
+            allz |= nz;
         }
     }
     for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
diff --git a/libavcodec/aacpsy.c b/libavcodec/aacpsy.c
index a987be0abb..d9896ed74f 100644
--- a/libavcodec/aacpsy.c
+++ b/libavcodec/aacpsy.c
@@ -39,8 +39,8 @@
  * constants for 3GPP AAC psychoacoustic model
  * @{
  */
-#define PSY_3GPP_SPREAD_HI   1.5f // spreading factor for ascending threshold spreading  (15 dB/Bark)
-#define PSY_3GPP_SPREAD_LOW  3.0f // spreading factor for descending threshold spreading (30 dB/Bark)
+#define PSY_3GPP_THR_SPREAD_HI   1.5f // spreading factor for low-to-hi threshold spreading  (15 dB/Bark)
+#define PSY_3GPP_THR_SPREAD_LOW  3.0f // spreading factor for hi-to-low threshold spreading  (30 dB/Bark)
 
 #define PSY_3GPP_RPEMIN      0.01f
 #define PSY_3GPP_RPELEV      2.0f
@@ -61,9 +61,7 @@
  */
 typedef struct AacPsyBand{
     float energy;    ///< band energy
-    float ffac;      ///< form factor
     float thr;       ///< energy threshold
-    float min_snr;   ///< minimal SNR
     float thr_quiet; ///< threshold in quiet
 }AacPsyBand;
 
@@ -88,17 +86,18 @@ typedef struct AacPsyChannel{
  * psychoacoustic model frame type-dependent coefficients
  */
 typedef struct AacPsyCoeffs{
-    float ath       [64]; ///< absolute threshold of hearing per bands
-    float barks     [64]; ///< Bark value for each spectral band in long frame
-    float spread_low[64]; ///< spreading factor for low-to-high threshold spreading in long frame
-    float spread_hi [64]; ///< spreading factor for high-to-low threshold spreading in long frame
+    float ath;           ///< absolute threshold of hearing per bands
+    float barks;         ///< Bark value for each spectral band in long frame
+    float spread_low[2]; ///< spreading factor for low-to-high threshold spreading in long frame
+    float spread_hi [2]; ///< spreading factor for high-to-low threshold spreading in long frame
+    float min_snr;       ///< minimal SNR
 }AacPsyCoeffs;
 
 /**
  * 3GPP TS26.403-inspired psychoacoustic model specific data
  */
 typedef struct AacPsyContext{
-    AacPsyCoeffs psy_coef[2];
+    AacPsyCoeffs psy_coef[2][64];
     AacPsyChannel *ch;
 }AacPsyContext;
 
@@ -243,27 +242,30 @@ static av_cold int psy_3gpp_init(FFPsyContext *ctx) {
 
     minath = ath(3410, ATH_ADD);
     for (j = 0; j < 2; j++) {
-        AacPsyCoeffs *coeffs = &pctx->psy_coef[j];
+        AacPsyCoeffs *coeffs = pctx->psy_coef[j];
+        const uint8_t *band_sizes = ctx->bands[j];
         float line_to_frequency = ctx->avctx->sample_rate / (j ? 256.f : 2048.0f);
         i = 0;
         prev = 0.0;
         for (g = 0; g < ctx->num_bands[j]; g++) {
-            i += ctx->bands[j][g];
+            i += band_sizes[g];
             bark = calc_bark((i-1) * line_to_frequency);
-            coeffs->barks[g] = (bark + prev) / 2.0;
+            coeffs[g].barks = (bark + prev) / 2.0;
             prev = bark;
         }
         for (g = 0; g < ctx->num_bands[j] - 1; g++) {
-            coeffs->spread_low[g] = pow(10.0, -(coeffs->barks[g+1] - coeffs->barks[g]) * PSY_3GPP_SPREAD_LOW);
-            coeffs->spread_hi [g] = pow(10.0, -(coeffs->barks[g+1] - coeffs->barks[g]) * PSY_3GPP_SPREAD_HI);
+            AacPsyCoeffs *coeff = &coeffs[g];
+            float bark_width = coeffs[g+1].barks - coeffs->barks;
+            coeff->spread_low[0] = pow(10.0, -bark_width * PSY_3GPP_THR_SPREAD_LOW);
+            coeff->spread_hi [0] = pow(10.0, -bark_width * PSY_3GPP_THR_SPREAD_HI);
         }
         start = 0;
         for (g = 0; g < ctx->num_bands[j]; g++) {
             minscale = ath(start * line_to_frequency, ATH_ADD);
-            for (i = 1; i < ctx->bands[j][g]; i++)
+            for (i = 1; i < band_sizes[g]; i++)
                 minscale = FFMIN(minscale, ath((start + i) * line_to_frequency, ATH_ADD));
-            coeffs->ath[g] = minscale - minath;
-            start += ctx->bands[j][g];
+            coeffs[g].ath = minscale - minath;
+            start += band_sizes[g];
         }
     }
 
@@ -393,9 +395,9 @@ static void psy_3gpp_analyze(FFPsyContext *ctx, int channel,
     AacPsyChannel *pch  = &pctx->ch[channel];
     int start = 0;
     int i, w, g;
-    const int num_bands       = ctx->num_bands[wi->num_windows == 8];
-    const uint8_t* band_sizes = ctx->bands[wi->num_windows == 8];
-    AacPsyCoeffs *coeffs     = &pctx->psy_coef[wi->num_windows == 8];
+    const int      num_bands  = ctx->num_bands[wi->num_windows == 8];
+    const uint8_t *band_sizes = ctx->bands[wi->num_windows == 8];
+    AacPsyCoeffs  *coeffs     = &pctx->psy_coef[wi->num_windows == 8];
 
     //calculate energies, initial thresholds and related values - 5.4.2 "Threshold Calculation"
     for (w = 0; w < wi->num_windows*16; w += 16) {
@@ -406,26 +408,37 @@ static void psy_3gpp_analyze(FFPsyContext *ctx, int channel,
                 band->energy += coefs[start+i] * coefs[start+i];
             band->thr     = band->energy * 0.001258925f;
             start        += band_sizes[g];
-
-            ctx->psy_bands[channel*PSY_MAX_BANDS+w+g].energy = band->energy;
         }
     }
-    //modify thresholds - spread, threshold in quiet - 5.4.3 "Spreaded Energy Calculation"
+    //modify thresholds and energies - spread, threshold in quiet, pre-echo control
     for (w = 0; w < wi->num_windows*16; w += 16) {
-        AacPsyBand *band = &pch->band[w];
+        AacPsyBand *bands = &pch->band[w];
+        //5.4.2.3 "Spreading" & 5.4.3 "Spreaded Energy Calculation"
         for (g = 1; g < num_bands; g++)
-            band[g].thr = FFMAX(band[g].thr, band[g-1].thr * coeffs->spread_hi [g]);
+            bands[g].thr = FFMAX(bands[g].thr, bands[g-1].thr * coeffs[g].spread_hi[0]);
         for (g = num_bands - 2; g >= 0; g--)
-            band[g].thr = FFMAX(band[g].thr, band[g+1].thr * coeffs->spread_low[g]);
+            bands[g].thr = FFMAX(bands[g].thr, bands[g+1].thr * coeffs[g].spread_low[0]);
+        //5.4.2.4 "Threshold in quiet"
         for (g = 0; g < num_bands; g++) {
-            band[g].thr_quiet = band[g].thr = FFMAX(band[g].thr, coeffs->ath[g]);
+            AacPsyBand *band = &bands[g];
+            band->thr_quiet = band->thr = FFMAX(band->thr, coeffs[g].ath);
+            //5.4.2.5 "Pre-echo control"
             if (!(wi->window_type[0] == LONG_STOP_SEQUENCE || (wi->window_type[1] == LONG_START_SEQUENCE && !w)))
-                band[g].thr = FFMAX(PSY_3GPP_RPEMIN*band[g].thr, FFMIN(band[g].thr,
-                                    PSY_3GPP_RPELEV*pch->prev_band[w+g].thr_quiet));
+                band->thr = FFMAX(PSY_3GPP_RPEMIN*band->thr, FFMIN(band->thr,
+                                  PSY_3GPP_RPELEV*pch->prev_band[w+g].thr_quiet));
+        }
+    }
+
+    for (w = 0; w < wi->num_windows*16; w += 16) {
+        for (g = 0; g < num_bands; g++) {
+            AacPsyBand *band     = &pch->band[w+g];
+            FFPsyBand  *psy_band = &ctx->psy_bands[channel*PSY_MAX_BANDS+w+g];
 
-            ctx->psy_bands[channel*PSY_MAX_BANDS+w+g].threshold = band[g].thr;
+            psy_band->threshold = band->thr;
+            psy_band->energy    = band->energy;
         }
     }
+
     memcpy(pch->prev_band, pch->band, sizeof(pch->band));
 }
 
@@ -553,22 +566,9 @@ static FFPsyWindowInfo psy_lame_window(FFPsyContext *ctx,
         if (pch->prev_attack == 3 || att_sum) {
             uselongblock = 0;
 
-            if (attacks[1] && attacks[0])
-                attacks[1] = 0;
-            if (attacks[2] && attacks[1])
-                attacks[2] = 0;
-            if (attacks[3] && attacks[2])
-                attacks[3] = 0;
-            if (attacks[4] && attacks[3])
-                attacks[4] = 0;
-            if (attacks[5] && attacks[4])
-                attacks[5] = 0;
-            if (attacks[6] && attacks[5])
-                attacks[6] = 0;
-            if (attacks[7] && attacks[6])
-                attacks[7] = 0;
-            if (attacks[8] && attacks[7])
-                attacks[8] = 0;
+            for (i = 1; i < AAC_NUM_BLOCKS_SHORT + 1; i++)
+                if (attacks[i] && attacks[i-1])
+                    attacks[i] = 0;
         }
     } else {
         /* We have no lookahead info, so just use same type as the previous sequence. */
diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index 1f7bd4cbc0..b293642b1d 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -222,6 +222,12 @@ static void bswap_buf(uint32_t *dst, const uint32_t *src, int w){
     }
 }
 
+static void bswap16_buf(uint16_t *dst, const uint16_t *src, int len)
+{
+    while (len--)
+        *dst++ = av_bswap16(*src++);
+}
+
 static int sse4_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h)
 {
     int s, i;
@@ -4324,6 +4330,7 @@ av_cold void dsputil_init(DSPContext* c, AVCodecContext *avctx)
     c->add_hfyu_left_prediction  = add_hfyu_left_prediction_c;
     c->add_hfyu_left_prediction_bgr32 = add_hfyu_left_prediction_bgr32_c;
     c->bswap_buf= bswap_buf;
+    c->bswap16_buf = bswap16_buf;
 #if CONFIG_PNG_DECODER
     c->add_png_paeth_prediction= ff_add_png_paeth_prediction;
 #endif
diff --git a/libavcodec/dsputil.h b/libavcodec/dsputil.h
index 3e55d1338d..017219bc89 100644
--- a/libavcodec/dsputil.h
+++ b/libavcodec/dsputil.h
@@ -369,6 +369,7 @@ typedef struct DSPContext {
     /* this might write to dst[w] */
     void (*add_png_paeth_prediction)(uint8_t *dst, uint8_t *src, uint8_t *top, int w, int bpp);
     void (*bswap_buf)(uint32_t *dst, const uint32_t *src, int w);
+    void (*bswap16_buf)(uint16_t *dst, const uint16_t *src, int len);
 
     void (*h263_v_loop_filter)(uint8_t *src, int stride, int qscale);
     void (*h263_h_loop_filter)(uint8_t *src, int stride, int qscale);
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 40d689e1f6..5a39bff168 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -1078,13 +1078,13 @@ unsigned avcodec_version( void )
 
 const char *avcodec_configuration(void)
 {
-    return FFMPEG_CONFIGURATION;
+    return LIBAV_CONFIGURATION;
 }
 
 const char *avcodec_license(void)
 {
 #define LICENSE_PREFIX "libavcodec license: "
-    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
+    return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
 }
 
 void avcodec_init(void)
diff --git a/libavcodec/x86/mathops.h b/libavcodec/x86/mathops.h
index 5949dfe3d4..33d9a6c8ff 100644
--- a/libavcodec/x86/mathops.h
+++ b/libavcodec/x86/mathops.h
@@ -26,24 +26,45 @@
 #include "libavutil/common.h"
 
 #if ARCH_X86_32
-#define MULL(ra, rb, shift) \
-        ({ int rt, dummy; __asm__ (\
-            "imull %3               \n\t"\
-            "shrdl %4, %%edx, %%eax \n\t"\
-            : "=a"(rt), "=d"(dummy)\
-            : "a" ((int)(ra)), "rm" ((int)(rb)), "i"(shift));\
-         rt; })
 
-#define MULH(ra, rb) \
-    ({ int rt, dummy;\
-     __asm__ ("imull %3\n\t" : "=d"(rt), "=a"(dummy): "a" ((int)(ra)), "rm" ((int)(rb)));\
-     rt; })
+#define MULL MULL
+static av_always_inline av_const int MULL(int a, int b, unsigned shift)
+{
+    int rt, dummy;
+    __asm__ (
+        "imull %3               \n\t"
+        "shrdl %4, %%edx, %%eax \n\t"
+        :"=a"(rt), "=d"(dummy)
+        :"a"(a), "rm"(b), "ci"((uint8_t)shift)
+    );
+    return rt;
+}
 
-#define MUL64(ra, rb) \
-    ({ int64_t rt;\
-     __asm__ ("imull %2\n\t" : "=A"(rt) : "a" ((int)(ra)), "g" ((int)(rb)));\
-     rt; })
-#endif
+#define MULH MULH
+static av_always_inline av_const int MULH(int a, int b)
+{
+    int rt, dummy;
+    __asm__ (
+        "imull %3"
+        :"=d"(rt), "=a"(dummy)
+        :"a"(a), "rm"(b)
+    );
+    return rt;
+}
+
+#define MUL64 MUL64
+static av_always_inline av_const int64_t MUL64(int a, int b)
+{
+    int64_t rt;
+    __asm__ (
+        "imull %2"
+        :"=A"(rt)
+        :"a"(a), "rm"(b)
+    );
+    return rt;
+}
+
+#endif /* ARCH_X86_32 */
 
 #if HAVE_CMOV
 /* median of 3 */
diff --git a/libavdevice/avdevice.c b/libavdevice/avdevice.c
index 3d67b4b8be..6c363feaa4 100644
--- a/libavdevice/avdevice.c
+++ b/libavdevice/avdevice.c
@@ -25,11 +25,11 @@ unsigned avdevice_version(void)
 
 const char * avdevice_configuration(void)
 {
-    return FFMPEG_CONFIGURATION;
+    return LIBAV_CONFIGURATION;
 }
 
 const char * avdevice_license(void)
 {
 #define LICENSE_PREFIX "libavdevice license: "
-    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
+    return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
 }
diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index 039e04bf64..a46bc53d6a 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -34,13 +34,13 @@ unsigned avfilter_version(void) {
 
 const char *avfilter_configuration(void)
 {
-    return FFMPEG_CONFIGURATION;
+    return LIBAV_CONFIGURATION;
 }
 
 const char *avfilter_license(void)
 {
 #define LICENSE_PREFIX "libavfilter license: "
-    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
+    return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
 }
 
 AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask)
diff --git a/libavformat/4xm.c b/libavformat/4xm.c
index ed722805b2..699277248d 100644
--- a/libavformat/4xm.c
+++ b/libavformat/4xm.c
@@ -106,7 +106,7 @@ static int fourxm_read_header(AVFormatContext *s,
     fourxm->fps = 1.0;
 
     /* skip the first 3 32-bit numbers */
-    avio_seek(pb, 12, SEEK_CUR);
+    avio_skip(pb, 12);
 
     /* check for LIST-HEAD */
     GET_LIST_HEADER();
@@ -322,12 +322,12 @@ static int fourxm_read_packet(AVFormatContext *s,
                 fourxm->tracks[track_number].audio_pts += audio_frame_count;
 
             } else {
-                avio_seek(pb, size, SEEK_CUR);
+                avio_skip(pb, size);
             }
             break;
 
         default:
-            avio_seek(pb, size, SEEK_CUR);
+            avio_skip(pb, size);
             break;
         }
     }
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 4eb1620700..c521cd384c 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -131,9 +131,9 @@ OBJS-$(CONFIG_MMF_MUXER)                 += mmf.o riff.o
 OBJS-$(CONFIG_MOV_DEMUXER)               += mov.o riff.o isom.o
 OBJS-$(CONFIG_MOV_MUXER)                 += movenc.o riff.o isom.o avc.o \
                                             movenchint.o rtpenc_chain.o
-OBJS-$(CONFIG_MP2_MUXER)                 += mp3enc.o
+OBJS-$(CONFIG_MP2_MUXER)                 += mp3enc.o rawenc.o
 OBJS-$(CONFIG_MP3_DEMUXER)               += mp3dec.o
-OBJS-$(CONFIG_MP3_MUXER)                 += mp3enc.o
+OBJS-$(CONFIG_MP3_MUXER)                 += mp3enc.o rawenc.o
 OBJS-$(CONFIG_MPC_DEMUXER)               += mpc.o apetag.o
 OBJS-$(CONFIG_MPC8_DEMUXER)              += mpc8.o
 OBJS-$(CONFIG_MPEG1SYSTEM_MUXER)         += mpegenc.o
diff --git a/libavformat/a64.c b/libavformat/a64.c
index 17dcd96b5b..3481ee7d03 100644
--- a/libavformat/a64.c
+++ b/libavformat/a64.c
@@ -149,7 +149,7 @@ static int a64_write_packet(struct AVFormatContext *s, AVPacket *pkt)
         break;
     }
 
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     return 0;
 }
 
diff --git a/libavformat/adtsenc.c b/libavformat/adtsenc.c
index 1f5453dbaf..a03e128d96 100644
--- a/libavformat/adtsenc.c
+++ b/libavformat/adtsenc.c
@@ -132,7 +132,7 @@ static int adts_write_packet(AVFormatContext *s, AVPacket *pkt)
         }
     }
     avio_write(pb, pkt->data, pkt->size);
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     return 0;
 }
diff --git a/libavformat/aea.c b/libavformat/aea.c
index 60b2d38fdc..2a1d24d7a2 100644
--- a/libavformat/aea.c
+++ b/libavformat/aea.c
@@ -62,9 +62,9 @@ static int aea_read_header(AVFormatContext *s,
         return AVERROR(ENOMEM);
 
     /* Parse the amount of channels and skip to pos 2048(0x800) */
-    avio_seek(s->pb, 264, SEEK_CUR);
+    avio_skip(s->pb, 264);
     st->codec->channels = avio_r8(s->pb);
-    avio_seek(s->pb, 1783, SEEK_CUR);
+    avio_skip(s->pb, 1783);
 
 
     st->codec->codec_type     = AVMEDIA_TYPE_AUDIO;
diff --git a/libavformat/aiffdec.c b/libavformat/aiffdec.c
index 9e3d39c371..c43ee32adc 100644
--- a/libavformat/aiffdec.c
+++ b/libavformat/aiffdec.c
@@ -70,7 +70,7 @@ static void get_meta(AVFormatContext *s, const char *key, int size)
     int res;
 
     if (!str) {
-        avio_seek(s->pb, size, SEEK_CUR);
+        avio_skip(s->pb, size);
         return;
     }
 
@@ -152,7 +152,7 @@ static unsigned int get_aiff_header(AVIOContext *pb, AVCodecContext *codec,
 
     /* Chunk is over */
     if (size)
-        avio_seek(pb, size, SEEK_CUR);
+        avio_skip(pb, size);
 
     return num_frames;
 }
@@ -242,7 +242,7 @@ static int aiff_read_header(AVFormatContext *s,
                 av_log(s, AV_LOG_ERROR, "file is not seekable\n");
                 return -1;
             }
-            avio_seek(pb, size - 8, SEEK_CUR);
+            avio_skip(pb, size - 8);
             break;
         case MKTAG('w', 'a', 'v', 'e'):
             if ((uint64_t)size > (1<<30))
@@ -256,7 +256,7 @@ static int aiff_read_header(AVFormatContext *s,
         default: /* Jump */
             if (size & 1)   /* Always even aligned */
                 size++;
-            avio_seek(pb, size, SEEK_CUR);
+            avio_skip(pb, size);
         }
     }
 
diff --git a/libavformat/aiffenc.c b/libavformat/aiffenc.c
index 3e5936248c..6fc09aeb63 100644
--- a/libavformat/aiffenc.c
+++ b/libavformat/aiffenc.c
@@ -98,7 +98,7 @@ static int aiff_write_header(AVFormatContext *s)
     av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
 
     /* Data is starting here */
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     return 0;
 }
@@ -140,7 +140,7 @@ static int aiff_write_trailer(AVFormatContext *s)
         /* return to the end */
         avio_seek(pb, end_size, SEEK_SET);
 
-        put_flush_packet(pb);
+        avio_flush(pb);
     }
 
     return 0;
diff --git a/libavformat/amr.c b/libavformat/amr.c
index 9d6581dee5..0459632b10 100644
--- a/libavformat/amr.c
+++ b/libavformat/amr.c
@@ -50,14 +50,14 @@ static int amr_write_header(AVFormatContext *s)
     {
         return -1;
     }
-    put_flush_packet(pb);
+    avio_flush(pb);
     return 0;
 }
 
 static int amr_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
     avio_write(s->pb, pkt->data, pkt->size);
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     return 0;
 }
 #endif /* CONFIG_AMR_MUXER */
diff --git a/libavformat/anm.c b/libavformat/anm.c
index 2a0109d1de..269e325e42 100644
--- a/libavformat/anm.c
+++ b/libavformat/anm.c
@@ -83,7 +83,7 @@ static int read_header(AVFormatContext *s,
     AVStream *st;
     int i, ret;
 
-    avio_seek(pb, 4, SEEK_CUR); /* magic number */
+    avio_skip(pb, 4); /* magic number */
     if (avio_rl16(pb) != MAX_PAGES) {
         av_log_ask_for_sample(s, "max_pages != " AV_STRINGIFY(MAX_PAGES) "\n");
         return AVERROR_INVALIDDATA;
@@ -91,7 +91,7 @@ static int read_header(AVFormatContext *s,
 
     anm->nb_pages   = avio_rl16(pb);
     anm->nb_records = avio_rl32(pb);
-    avio_seek(pb, 2, SEEK_CUR); /* max records per page */
+    avio_skip(pb, 2); /* max records per page */
     anm->page_table_offset = avio_rl16(pb);
     if (avio_rl32(pb) != ANIM_TAG)
         return AVERROR_INVALIDDATA;
@@ -107,13 +107,13 @@ static int read_header(AVFormatContext *s,
     st->codec->height     = avio_rl16(pb);
     if (avio_r8(pb) != 0)
         goto invalid;
-    avio_seek(pb, 1, SEEK_CUR); /* frame rate multiplier info */
+    avio_skip(pb, 1); /* frame rate multiplier info */
 
     /* ignore last delta record (used for looping) */
     if (avio_r8(pb))  /* has_last_delta */
         anm->nb_records = FFMAX(anm->nb_records - 1, 0);
 
-    avio_seek(pb, 1, SEEK_CUR); /* last_delta_valid */
+    avio_skip(pb, 1); /* last_delta_valid */
 
     if (avio_r8(pb) != 0)
         goto invalid;
@@ -121,15 +121,15 @@ static int read_header(AVFormatContext *s,
     if (avio_r8(pb) != 1)
         goto invalid;
 
-    avio_seek(pb, 1, SEEK_CUR); /* other recs per frame */
+    avio_skip(pb, 1); /* other recs per frame */
 
     if (avio_r8(pb) != 1)
         goto invalid;
 
-    avio_seek(pb, 32, SEEK_CUR); /* record_types */
+    avio_skip(pb, 32); /* record_types */
     st->nb_frames = avio_rl32(pb);
     av_set_pts_info(st, 64, 1, avio_rl16(pb));
-    avio_seek(pb, 58, SEEK_CUR);
+    avio_skip(pb, 58);
 
     /* color cycling and palette data */
     st->codec->extradata_size = 16*8 + 4*256;
@@ -193,7 +193,7 @@ repeat:
     /* parse page header */
     if (anm->record < 0) {
         avio_seek(pb, anm->page_table_offset + MAX_PAGES*6 + (anm->page<<16), SEEK_SET);
-        avio_seek(pb, 8 + 2*p->nb_records, SEEK_CUR);
+        avio_skip(pb, 8 + 2*p->nb_records);
         anm->record = 0;
     }
 
diff --git a/libavformat/ape.c b/libavformat/ape.c
index 187c9865a4..456407cb46 100644
--- a/libavformat/ape.c
+++ b/libavformat/ape.c
@@ -187,7 +187,7 @@ static int ape_read_header(AVFormatContext * s, AVFormatParameters * ap)
         /* Skip any unknown bytes at the end of the descriptor.
            This is for future compatibility */
         if (ape->descriptorlength > 52)
-            avio_seek(pb, ape->descriptorlength - 52, SEEK_CUR);
+            avio_skip(pb, ape->descriptorlength - 52);
 
         /* Read header data */
         ape->compressiontype      = avio_rl16(pb);
@@ -212,7 +212,7 @@ static int ape_read_header(AVFormatContext * s, AVFormatParameters * ap)
         ape->finalframeblocks     = avio_rl32(pb);
 
         if (ape->formatflags & MAC_FORMAT_FLAG_HAS_PEAK_LEVEL) {
-            avio_seek(pb, 4, SEEK_CUR); /* Skip the peak level */
+            avio_skip(pb, 4); /* Skip the peak level */
             ape->headerlength += 4;
         }
 
@@ -239,7 +239,7 @@ static int ape_read_header(AVFormatContext * s, AVFormatParameters * ap)
 
         /* Skip any stored wav header */
         if (!(ape->formatflags & MAC_FORMAT_FLAG_CREATE_WAV_HEADER))
-            avio_seek(pb, ape->wavheaderlength, SEEK_CUR);
+            avio_skip(pb, ape->wavheaderlength);
     }
 
     if(!ape->totalframes){
diff --git a/libavformat/applehttp.c b/libavformat/applehttp.c
index 231abab87c..324494ad74 100644
--- a/libavformat/applehttp.c
+++ b/libavformat/applehttp.c
@@ -86,57 +86,6 @@ static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
     return len;
 }
 
-static void make_absolute_url(char *buf, int size, const char *base,
-                              const char *rel)
-{
-    char *sep;
-    /* Absolute path, relative to the current server */
-    if (base && strstr(base, "://") && rel[0] == '/') {
-        if (base != buf)
-            av_strlcpy(buf, base, size);
-        sep = strstr(buf, "://");
-        if (sep) {
-            sep += 3;
-            sep = strchr(sep, '/');
-            if (sep)
-                *sep = '\0';
-        }
-        av_strlcat(buf, rel, size);
-        return;
-    }
-    /* If rel actually is an absolute url, just copy it */
-    if (!base || strstr(rel, "://") || rel[0] == '/') {
-        av_strlcpy(buf, rel, size);
-        return;
-    }
-    if (base != buf)
-        av_strlcpy(buf, base, size);
-    /* Remove the file name from the base url */
-    sep = strrchr(buf, '/');
-    if (sep)
-        sep[1] = '\0';
-    else
-        buf[0] = '\0';
-    while (av_strstart(rel, "../", NULL) && sep) {
-        /* Remove the path delimiter at the end */
-        sep[0] = '\0';
-        sep = strrchr(buf, '/');
-        /* If the next directory name to pop off is "..", break here */
-        if (!strcmp(sep ? &sep[1] : buf, "..")) {
-            /* Readd the slash we just removed */
-            av_strlcat(buf, "/", size);
-            break;
-        }
-        /* Cut off the directory name */
-        if (sep)
-            sep[1] = '\0';
-        else
-            buf[0] = '\0';
-        rel += 3;
-    }
-    av_strlcat(buf, rel, size);
-}
-
 static void free_segment_list(struct variant *var)
 {
     int i;
@@ -183,7 +132,7 @@ static struct variant *new_variant(AppleHTTPContext *c, int bandwidth,
         return NULL;
     reset_packet(&var->pkt);
     var->bandwidth = bandwidth;
-    make_absolute_url(var->url, sizeof(var->url), base, url);
+    ff_make_absolute_url(var->url, sizeof(var->url), base, url);
     dynarray_add(&c->variants, &c->n_variants, var);
     return var;
 }
@@ -274,7 +223,7 @@ static int parse_playlist(AppleHTTPContext *c, const char *url,
                     goto fail;
                 }
                 seg->duration = duration;
-                make_absolute_url(seg->url, sizeof(seg->url), url, line);
+                ff_make_absolute_url(seg->url, sizeof(seg->url), url, line);
                 dynarray_add(&var->segments, &var->n_segments, seg);
                 is_segment = 0;
             }
@@ -519,7 +468,7 @@ reload:
                c->max_start_seq - c->cur_seq_no);
         c->cur_seq_no = c->max_start_seq;
     }
-    /* If more segments exit, open the next one */
+    /* If more segments exist, open the next one */
     if (c->cur_seq_no < c->min_end_seq)
         goto start;
     /* We've reached the end of the playlists - return eof if this is a
diff --git a/libavformat/applehttpproto.c b/libavformat/applehttpproto.c
index 4b7e9c72a9..630d02d3d6 100644
--- a/libavformat/applehttpproto.c
+++ b/libavformat/applehttpproto.c
@@ -75,57 +75,6 @@ static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
     return len;
 }
 
-static void make_absolute_url(char *buf, int size, const char *base,
-                              const char *rel)
-{
-    char *sep;
-    /* Absolute path, relative to the current server */
-    if (base && strstr(base, "://") && rel[0] == '/') {
-        if (base != buf)
-            av_strlcpy(buf, base, size);
-        sep = strstr(buf, "://");
-        if (sep) {
-            sep += 3;
-            sep = strchr(sep, '/');
-            if (sep)
-                *sep = '\0';
-        }
-        av_strlcat(buf, rel, size);
-        return;
-    }
-    /* If rel actually is an absolute url, just copy it */
-    if (!base || strstr(rel, "://") || rel[0] == '/') {
-        av_strlcpy(buf, rel, size);
-        return;
-    }
-    if (base != buf)
-        av_strlcpy(buf, base, size);
-    /* Remove the file name from the base url */
-    sep = strrchr(buf, '/');
-    if (sep)
-        sep[1] = '\0';
-    else
-        buf[0] = '\0';
-    while (av_strstart(rel, "../", NULL) && sep) {
-        /* Remove the path delimiter at the end */
-        sep[0] = '\0';
-        sep = strrchr(buf, '/');
-        /* If the next directory name to pop off is "..", break here */
-        if (!strcmp(sep ? &sep[1] : buf, "..")) {
-            /* Readd the slash we just removed */
-            av_strlcat(buf, "/", size);
-            break;
-        }
-        /* Cut off the directory name */
-        if (sep)
-            sep[1] = '\0';
-        else
-            buf[0] = '\0';
-        rel += 3;
-    }
-    av_strlcat(buf, rel, size);
-}
-
 static void free_segment_list(AppleHTTPContext *s)
 {
     int i;
@@ -201,7 +150,7 @@ static int parse_playlist(URLContext *h, const char *url)
                     goto fail;
                 }
                 seg->duration = duration;
-                make_absolute_url(seg->url, sizeof(seg->url), url, line);
+                ff_make_absolute_url(seg->url, sizeof(seg->url), url, line);
                 dynarray_add(&s->segments, &s->n_segments, seg);
                 is_segment = 0;
             } else if (is_variant) {
@@ -211,7 +160,7 @@ static int parse_playlist(URLContext *h, const char *url)
                     goto fail;
                 }
                 var->bandwidth = bandwidth;
-                make_absolute_url(var->url, sizeof(var->url), url, line);
+                ff_make_absolute_url(var->url, sizeof(var->url), url, line);
                 dynarray_add(&s->variants, &s->n_variants, var);
                 is_variant = 0;
             }
diff --git a/libavformat/asfdec.c b/libavformat/asfdec.c
index f9bb51c895..7d08e6ebcf 100644
--- a/libavformat/asfdec.c
+++ b/libavformat/asfdec.c
@@ -349,7 +349,7 @@ static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
         avio_rl16(pb); /* panes */
         st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
         tag1 = avio_rl32(pb);
-        avio_seek(pb, 20, SEEK_CUR);
+        avio_skip(pb, 20);
         //                av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
         if (sizeX > 40) {
             st->codec->extradata_size = sizeX - 40;
@@ -387,7 +387,7 @@ static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
             st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
     }
     pos2 = avio_tell(pb);
-    avio_seek(pb, size - (pos2 - pos1 + 24), SEEK_CUR);
+    avio_skip(pb, size - (pos2 - pos1 + 24));
 
     return 0;
 }
@@ -427,14 +427,14 @@ static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
     for (i=0; i<stream_ct; i++){
         avio_rl16(pb);
         ext_len = avio_rl16(pb);
-        avio_seek(pb, ext_len, SEEK_CUR);
+        avio_skip(pb, ext_len);
     }
 
     for (i=0; i<payload_ext_ct; i++){
         ff_get_guid(pb, &g);
         ext_d=avio_rl16(pb);
         ext_len=avio_rl32(pb);
-        avio_seek(pb, ext_len, SEEK_CUR);
+        avio_skip(pb, ext_len);
     }
 
     return 0;
@@ -454,7 +454,7 @@ static int asf_read_content_desc(AVFormatContext *s, int64_t size)
     get_tag(s, "author"   , 0, len2);
     get_tag(s, "copyright", 0, len3);
     get_tag(s, "comment"  , 0, len4);
-    avio_seek(pb, len5, SEEK_CUR);
+    avio_skip(pb, len5);
 
     return 0;
 }
@@ -474,7 +474,7 @@ static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
         if (name_len%2)     // must be even, broken lavf versions wrote len-1
             name_len += 1;
         if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
-            avio_seek(pb, name_len - ret, SEEK_CUR);
+            avio_skip(pb, name_len - ret);
         value_type = avio_rl16(pb);
         value_len  = avio_rl16(pb);
         if (!value_type && value_len%2)
@@ -504,7 +504,7 @@ static int asf_read_language_list(AVFormatContext *s, int64_t size)
         char lang[6];
         unsigned int lang_len = avio_r8(pb);
         if ((ret = avio_get_str16le(pb, lang_len, lang, sizeof(lang))) < lang_len)
-            avio_seek(pb, lang_len - ret, SEEK_CUR);
+            avio_skip(pb, lang_len - ret);
         if (j < 128)
             av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
     }
@@ -530,10 +530,10 @@ static int asf_read_metadata(AVFormatContext *s, int64_t size)
         value_len=  avio_rl32(pb);
 
         if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
-            avio_seek(pb, name_len - ret, SEEK_CUR);
+            avio_skip(pb, name_len - ret);
         //av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
         value_num= avio_rl16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
-        avio_seek(pb, value_len - 2, SEEK_CUR);
+        avio_skip(pb, value_len - 2);
 
         if(stream_num<128){
             if     (!strcmp(name, "AspectRatioX")) asf->dar[stream_num].num= value_num;
@@ -570,7 +570,7 @@ static int asf_read_marker(AVFormatContext *s, int64_t size)
         avio_rl32(pb);             // flags
         name_len = avio_rl32(pb);  // name length
         if ((ret = avio_get_str16le(pb, name_len * 2, name, sizeof(name))) < name_len)
-            avio_seek(pb, name_len - ret, SEEK_CUR);
+            avio_skip(pb, name_len - ret);
         ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
     }
 
@@ -825,16 +825,16 @@ static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb){
 //            for(i=0; i<asf->packet_replic_size-8; i++)
 //                av_log(s, AV_LOG_DEBUG, "%02X ",avio_r8(pb));
 //            av_log(s, AV_LOG_DEBUG, "\n");
-            avio_seek(pb, 10, SEEK_CUR);
+            avio_skip(pb, 10);
             ts0= avio_rl64(pb);
             ts1= avio_rl64(pb);
-            avio_seek(pb, 12, SEEK_CUR);
+            avio_skip(pb, 12);
             avio_rl32(pb);
-            avio_seek(pb, asf->packet_replic_size - 8 - 38 - 4, SEEK_CUR);
+            avio_skip(pb, asf->packet_replic_size - 8 - 38 - 4);
             if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
             else         asf->packet_frag_timestamp= AV_NOPTS_VALUE;
         }else
-            avio_seek(pb, asf->packet_replic_size - 8, SEEK_CUR);
+            avio_skip(pb, asf->packet_replic_size - 8);
         rsize += asf->packet_replic_size; // FIXME - check validity
     } else if (asf->packet_replic_size==1){
         // multipacket - frag_offset is beginning timestamp
@@ -894,7 +894,7 @@ static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pk
             //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, avio_tell(pb));
             assert(ret>=0);
             /* fail safe */
-            avio_seek(pb, ret, SEEK_CUR);
+            avio_skip(pb, ret);
 
             asf->packet_pos= avio_tell(pb);
             if (asf->data_object_size != (uint64_t)-1 &&
@@ -913,7 +913,7 @@ static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pk
                 ) {
                 asf->packet_time_start = 0;
                 /* unhandled packet (should not happen) */
-                avio_seek(pb, asf->packet_frag_size, SEEK_CUR);
+                avio_skip(pb, asf->packet_frag_size);
                 asf->packet_size_left -= asf->packet_frag_size;
                 if(asf->stream_index < 0)
                     av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
@@ -933,7 +933,7 @@ static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pk
             if (asf->packet_multi_size < asf->packet_obj_size)
             {
                 asf->packet_time_start = 0;
-                avio_seek(pb, asf->packet_multi_size, SEEK_CUR);
+                avio_skip(pb, asf->packet_multi_size);
                 asf->packet_size_left -= asf->packet_multi_size;
                 continue;
             }
@@ -1198,7 +1198,7 @@ static void asf_build_simple_index(AVFormatContext *s, int stream_index)
             avio_seek(s->pb, current_pos, SEEK_SET);
             return;
         }
-        avio_seek(s->pb, gsize-24, SEEK_CUR);
+        avio_skip(s->pb, gsize-24);
         ff_get_guid(s->pb, &g);
     }
 
diff --git a/libavformat/asfenc.c b/libavformat/asfenc.c
index 3a06044036..36b9472018 100644
--- a/libavformat/asfenc.c
+++ b/libavformat/asfenc.c
@@ -574,7 +574,7 @@ static int asf_write_header(AVFormatContext *s)
         return -1;
     }
 
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
 
     asf->packet_nb_payloads = 0;
     asf->packet_timestamp_start = -1;
@@ -672,7 +672,7 @@ static void flush_packet(AVFormatContext *s)
 
     avio_write(s->pb, asf->packet_buf, s->packet_size - packet_hdr_size);
 
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     asf->nb_packets++;
     asf->packet_nb_payloads = 0;
     asf->packet_timestamp_start = -1;
@@ -864,7 +864,7 @@ static int asf_write_trailer(AVFormatContext *s)
     if ((!asf->is_streamed) && (asf->nb_index_count != 0)) {
         asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->nb_index_count);
     }
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
 
     if (asf->is_streamed || url_is_streamed(s->pb)) {
         put_chunk(s, 0x4524, 0, 0); /* end of stream */
@@ -875,7 +875,7 @@ static int asf_write_trailer(AVFormatContext *s)
         asf_write_header1(s, file_size, data_size - asf->data_offset);
     }
 
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     av_free(asf->index_ptr);
     return 0;
 }
diff --git a/libavformat/assenc.c b/libavformat/assenc.c
index 9abe302744..b367668d2d 100644
--- a/libavformat/assenc.c
+++ b/libavformat/assenc.c
@@ -50,7 +50,7 @@ static int write_header(AVFormatContext *s)
         last=p;
     }
 
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
 
     return 0;
 }
@@ -59,7 +59,7 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
 {
     avio_write(s->pb, pkt->data, pkt->size);
 
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
 
     return 0;
 }
@@ -72,7 +72,7 @@ static int write_trailer(AVFormatContext *s)
     avio_write(s->pb, avctx->extradata      + ass->extra_index,
                       avctx->extradata_size - ass->extra_index);
 
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
 
     return 0;
 }
diff --git a/libavformat/au.c b/libavformat/au.c
index 9ea4010039..9c674ac6f6 100644
--- a/libavformat/au.c
+++ b/libavformat/au.c
@@ -74,7 +74,7 @@ static int au_write_header(AVFormatContext *s)
         return -1;
     }
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     return 0;
 }
@@ -99,7 +99,7 @@ static int au_write_trailer(AVFormatContext *s)
         avio_wb32(pb, (uint32_t)(file_size - 24));
         avio_seek(pb, file_size, SEEK_SET);
 
-        put_flush_packet(pb);
+        avio_flush(pb);
     }
 
     return 0;
@@ -147,7 +147,7 @@ static int au_read_header(AVFormatContext *s,
 
     if (size >= 24) {
         /* skip unused data */
-        avio_seek(pb, size - 24, SEEK_CUR);
+        avio_skip(pb, size - 24);
     }
 
     /* now we are ready: build format streams */
diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index 83b86d8146..9ba1f5725e 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -321,12 +321,12 @@ static void avi_read_nikon(AVFormatContext *s, uint64_t end)
                 }
                 if (name)
                     av_metadata_set2(&s->metadata, name, buffer, 0);
-                avio_seek(s->pb, size, SEEK_CUR);
+                avio_skip(s->pb, size);
             }
             break;
         }
         default:
-            avio_seek(s->pb, size, SEEK_CUR);
+            avio_skip(s->pb, size);
             break;
         }
     }
@@ -392,13 +392,13 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
             unsigned char date[64] = {0};
             size += (size & 1);
             size -= avio_read(pb, date, FFMIN(size, sizeof(date)-1));
-            avio_seek(pb, size, SEEK_CUR);
+            avio_skip(pb, size);
             avi_metadata_creation_time(&s->metadata, date);
             break;
         }
         case MKTAG('d', 'm', 'l', 'h'):
             avi->is_odml = 1;
-            avio_seek(pb, size + (size & 1), SEEK_CUR);
+            avio_skip(pb, size + (size & 1));
             break;
         case MKTAG('a', 'm', 'v', 'h'):
             amv_file_format=1;
@@ -410,13 +410,13 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
             avio_rl32(pb);
             avi->non_interleaved |= avio_rl32(pb) & AVIF_MUSTUSEINDEX;
 
-            avio_seek(pb, 2 * 4, SEEK_CUR);
+            avio_skip(pb, 2 * 4);
             avio_rl32(pb);
             avio_rl32(pb);
             avih_width=avio_rl32(pb);
             avih_height=avio_rl32(pb);
 
-            avio_seek(pb, size - 10 * 4, SEEK_CUR);
+            avio_skip(pb, size - 10 * 4);
             break;
         case MKTAG('s', 't', 'r', 'h'):
             /* stream header */
@@ -425,7 +425,7 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
             handler = avio_rl32(pb); /* codec tag */
 
             if(tag1 == MKTAG('p', 'a', 'd', 's')){
-                avio_seek(pb, size - 8, SEEK_CUR);
+                avio_skip(pb, size - 8);
                 break;
             }else{
                 stream_index++;
@@ -469,10 +469,10 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
                         goto fail;
                 }
                 s->streams[0]->priv_data = ast;
-                avio_seek(pb, 3 * 4, SEEK_CUR);
+                avio_skip(pb, 3 * 4);
                 ast->scale = avio_rl32(pb);
                 ast->rate = avio_rl32(pb);
-                avio_seek(pb, 4, SEEK_CUR);  /* start time */
+                avio_skip(pb, 4);  /* start time */
 
                 dv_dur = avio_rl32(pb);
                 if (ast->scale > 0 && ast->rate > 0 && dv_dur > 0) {
@@ -485,7 +485,7 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
                  */
 
                 stream_index = s->nb_streams - 1;
-                avio_seek(pb, size - 9*4, SEEK_CUR);
+                avio_skip(pb, size - 9*4);
                 break;
             }
 
@@ -542,12 +542,12 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
             if(ast->sample_size == 0)
                 st->duration = st->nb_frames;
             ast->frame_offset= ast->cum_len;
-            avio_seek(pb, size - 12 * 4, SEEK_CUR);
+            avio_skip(pb, size - 12 * 4);
             break;
         case MKTAG('s', 't', 'r', 'f'):
             /* stream header */
             if (stream_index >= (unsigned)s->nb_streams || avi->dv_demux) {
-                avio_seek(pb, size, SEEK_CUR);
+                avio_skip(pb, size);
             } else {
                 uint64_t cur_pos = avio_tell(pb);
                 if (cur_pos < list_end)
@@ -560,7 +560,7 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
                         st->codec->height=avih_height;
                         st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
                         st->codec->codec_id = CODEC_ID_AMV;
-                        avio_seek(pb, size, SEEK_CUR);
+                        avio_skip(pb, size);
                         break;
                     }
                     tag1 = ff_get_bmp_header(pb, st);
@@ -620,7 +620,7 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
                     }
                     st->codec->height= FFABS(st->codec->height);
 
-//                    avio_seek(pb, size - 5 * 4, SEEK_CUR);
+//                    avio_skip(pb, size - 5 * 4);
                     break;
                 case AVMEDIA_TYPE_AUDIO:
                     ff_get_wav_header(pb, st->codec, size);
@@ -630,7 +630,7 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
                         ast->sample_size= st->codec->block_align;
                     }
                     if (size&1) /* 2-aligned (fix for Stargate SG-1 - 3x18 - Shades of Grey.avi) */
-                        avio_seek(pb, 1, SEEK_CUR);
+                        avio_skip(pb, 1);
                     /* Force parsing as several audio frames can be in
                      * one packet and timestamps refer to packet start. */
                     st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
@@ -658,7 +658,7 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
                     st->codec->codec_type = AVMEDIA_TYPE_DATA;
                     st->codec->codec_id= CODEC_ID_NONE;
                     st->codec->codec_tag= 0;
-                    avio_seek(pb, size, SEEK_CUR);
+                    avio_skip(pb, size);
                     break;
                 }
             }
@@ -693,7 +693,7 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
                 }
                 size -= 9*4;
             }
-            avio_seek(pb, size, SEEK_CUR);
+            avio_skip(pb, size);
             break;
         case MKTAG('s', 't', 'r', 'n'):
             if(s->nb_streams){
@@ -710,7 +710,7 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
             }
             /* skip tag */
             size += (size & 1);
-            avio_seek(pb, size, SEEK_CUR);
+            avio_skip(pb, size);
             break;
         }
     }
@@ -762,7 +762,7 @@ static int read_gab2_sub(AVStream *st, AVPacket *pkt) {
             goto error;
 
         ret = avio_get_str16le(pb, desc_len, desc, sizeof(desc));
-        avio_seek(pb, desc_len - ret, SEEK_CUR);
+        avio_skip(pb, desc_len - ret);
         if (*desc)
             av_metadata_set2(&st->metadata, "title", desc, 0);
 
@@ -1008,14 +1008,14 @@ resync:
         //parse JUNK
            ||(d[0] == 'J' && d[1] == 'U' && d[2] == 'N' && d[3] == 'K')
            ||(d[0] == 'i' && d[1] == 'd' && d[2] == 'x' && d[3] == '1')){
-            avio_seek(pb, size, SEEK_CUR);
+            avio_skip(pb, size);
 //av_log(s, AV_LOG_DEBUG, "SKIP\n");
             goto resync;
         }
 
         //parse stray LIST
         if(d[0] == 'L' && d[1] == 'I' && d[2] == 'S' && d[3] == 'T'){
-            avio_seek(pb, 4, SEEK_CUR);
+            avio_skip(pb, 4);
             goto resync;
         }
 
@@ -1026,7 +1026,7 @@ resync:
 
         //detect ##ix chunk and skip
         if(d[2] == 'i' && d[3] == 'x' && n < s->nb_streams){
-            avio_seek(pb, size, SEEK_CUR);
+            avio_skip(pb, size);
             goto resync;
         }
 
@@ -1060,7 +1060,7 @@ resync:
                /*|| (st->discard >= AVDISCARD_NONKEY && !(pkt->flags & AV_PKT_FLAG_KEY))*/ //FIXME needs a little reordering
                || st->discard >= AVDISCARD_ALL){
                 ast->frame_offset += get_duration(ast, size);
-                avio_seek(pb, size, SEEK_CUR);
+                avio_skip(pb, size);
                 goto resync;
             }
 
@@ -1225,7 +1225,7 @@ static int avi_load_index(AVFormatContext *s)
         default:
         skip:
             size += (size & 1);
-            if (avio_seek(pb, size, SEEK_CUR) < 0)
+            if (avio_skip(pb, size) < 0)
                 goto the_end; // something is wrong here
             break;
         }
diff --git a/libavformat/avienc.c b/libavformat/avienc.c
index 8d9980cf46..3743abb8d7 100644
--- a/libavformat/avienc.c
+++ b/libavformat/avienc.c
@@ -393,7 +393,7 @@ static int avi_write_header(AVFormatContext *s)
     avi->movi_list = ff_start_tag(pb, "LIST");
     ffio_wfourcc(pb, "movi");
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     return 0;
 }
@@ -438,15 +438,15 @@ static int avi_write_ix(AVFormatContext *s)
              avio_wl32(pb, ((uint32_t)ie->len & ~0x80000000) |
                           (ie->flags & 0x10 ? 0 : 0x80000000));
          }
-         put_flush_packet(pb);
+         avio_flush(pb);
          pos = avio_tell(pb);
 
          /* Updating one entry in the AVI OpenDML master index */
          avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
          ffio_wfourcc(pb, "indx");            /* enabling this entry */
-         avio_seek(pb, 8, SEEK_CUR);
+         avio_skip(pb, 8);
          avio_wl32(pb, avi->riff_id);         /* nEntriesInUse */
-         avio_seek(pb, 16*avi->riff_id, SEEK_CUR);
+         avio_skip(pb, 16*avi->riff_id);
          avio_wl64(pb, ix);                   /* qwOffset */
          avio_wl32(pb, pos - ix);             /* dwSize */
          avio_wl32(pb, avist->indexes.entry); /* dwDuration */
@@ -578,7 +578,7 @@ static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
     if (size & 1)
         avio_w8(pb, 0);
 
-    put_flush_packet(pb);
+    avio_flush(pb);
     return 0;
 }
 
@@ -603,7 +603,7 @@ static int avi_write_trailer(AVFormatContext *s)
             file_size = avio_tell(pb);
             avio_seek(pb, avi->odml_list - 8, SEEK_SET);
             ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
-            avio_seek(pb, 16, SEEK_CUR);
+            avio_skip(pb, 16);
 
             for (n=nb_frames=0;n<s->nb_streams;n++) {
                 AVCodecContext *stream = s->streams[n]->codec;
@@ -624,7 +624,7 @@ static int avi_write_trailer(AVFormatContext *s)
             avi_write_counters(s, avi->riff_id);
         }
     }
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     for (i=0; i<s->nb_streams; i++) {
          AVIStream *avist= s->streams[i]->priv_data;
diff --git a/libavformat/avio.h b/libavformat/avio.h
index 20b5e80e38..2d2afc7112 100644
--- a/libavformat/avio.h
+++ b/libavformat/avio.h
@@ -429,6 +429,13 @@ attribute_deprecated int64_t url_ftell(AVIOContext *s);
 attribute_deprecated int64_t url_fsize(AVIOContext *s);
 #define URL_EOF (-1)
 attribute_deprecated int url_fgetc(AVIOContext *s);
+attribute_deprecated int url_setbufsize(AVIOContext *s, int buf_size);
+#ifdef __GNUC__
+attribute_deprecated int url_fprintf(AVIOContext *s, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
+#else
+attribute_deprecated int url_fprintf(AVIOContext *s, const char *fmt, ...);
+#endif
+attribute_deprecated void put_flush_packet(AVIOContext *s);
 /**
  * @}
  */
@@ -488,7 +495,10 @@ int64_t avio_skip(AVIOContext *s, int64_t offset);
  * ftell() equivalent for AVIOContext.
  * @return position or AVERROR.
  */
-#define avio_tell(s) avio_seek((s), 0, SEEK_CUR)
+static av_always_inline int64_t avio_tell(AVIOContext *s)
+{
+    return avio_seek(s, 0, SEEK_CUR);
+}
 
 /**
  * Get the filesize.
@@ -508,9 +518,9 @@ int64_t av_url_read_fseek(AVIOContext *h, int stream_index,
 
 /** @warning currently size is limited */
 #ifdef __GNUC__
-int url_fprintf(AVIOContext *s, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
+int avio_printf(AVIOContext *s, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
 #else
-int url_fprintf(AVIOContext *s, const char *fmt, ...);
+int avio_printf(AVIOContext *s, const char *fmt, ...);
 #endif
 
 #if FF_API_OLD_AVIO
@@ -519,7 +529,7 @@ int url_fprintf(AVIOContext *s, const char *fmt, ...);
 attribute_deprecated char *url_fgets(AVIOContext *s, char *buf, int buf_size);
 #endif
 
-void put_flush_packet(AVIOContext *s);
+void avio_flush(AVIOContext *s);
 
 
 /**
@@ -570,8 +580,6 @@ unsigned int avio_rb24(AVIOContext *s);
 unsigned int avio_rb32(AVIOContext *s);
 uint64_t     avio_rb64(AVIOContext *s);
 
-uint64_t ff_get_v(AVIOContext *bc);
-
 static inline int url_is_streamed(AVIOContext *s)
 {
     return s->is_streamed;
@@ -590,8 +598,6 @@ static inline int url_is_streamed(AVIOContext *s)
  */
 int url_fdopen(AVIOContext **s, URLContext *h);
 
-/** @warning must be called before any I/O */
-int url_setbufsize(AVIOContext *s, int buf_size);
 #if FF_API_URL_RESETBUF
 /** Reset the buffer for reading or writing.
  * @note Will drop any data currently in the buffer without transmitting it.
@@ -623,12 +629,12 @@ URLContext *url_fileno(AVIOContext *s);
  * @deprecated use AVIOContext.max_packet_size directly.
  */
 attribute_deprecated int url_fget_max_packet_size(AVIOContext *s);
-#endif
 
-int url_open_buf(AVIOContext **s, uint8_t *buf, int buf_size, int flags);
+attribute_deprecated int url_open_buf(AVIOContext **s, uint8_t *buf, int buf_size, int flags);
 
 /** return the written or read size */
-int url_close_buf(AVIOContext *s);
+attribute_deprecated int url_close_buf(AVIOContext *s);
+#endif
 
 /**
  * Open a write only memory stream.
diff --git a/libavformat/avio_internal.h b/libavformat/avio_internal.h
index 3abb619b8a..12578fac6c 100644
--- a/libavformat/avio_internal.h
+++ b/libavformat/avio_internal.h
@@ -61,4 +61,9 @@ static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
  */
 int ffio_rewind_with_probe_data(AVIOContext *s, unsigned char *buf, int buf_size);
 
+uint64_t ffio_read_varlen(AVIOContext *bc);
+
+/** @warning must be called before any I/O */
+int ffio_set_buf_size(AVIOContext *s, int buf_size);
+
 #endif // AVFORMAT_AVIO_INTERNAL_H
diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
index a4f95210bf..b8cfb9286a 100644
--- a/libavformat/aviobuf.c
+++ b/libavformat/aviobuf.c
@@ -170,7 +170,7 @@ void avio_write(AVIOContext *s, const unsigned char *buf, int size)
     }
 }
 
-void put_flush_packet(AVIOContext *s)
+void avio_flush(AVIOContext *s)
 {
     flush_buffer(s);
     s->must_flush = 0;
@@ -386,6 +386,26 @@ int64_t url_fsize(AVIOContext *s)
 {
     return avio_size(s);
 }
+int url_setbufsize(AVIOContext *s, int buf_size)
+{
+    return ffio_set_buf_size(s, buf_size);
+}
+int url_fprintf(AVIOContext *s, const char *fmt, ...)
+{
+    va_list ap;
+    char buf[4096];
+    int ret;
+
+    va_start(ap, fmt);
+    ret = vsnprintf(buf, sizeof(buf), fmt, ap);
+    va_end(ap);
+    avio_write(s, buf, strlen(buf));
+    return ret;
+}
+void put_flush_packet(AVIOContext *s)
+{
+    avio_flush(s);
+}
 #endif
 
 int avio_put_str(AVIOContext *s, const char *str)
@@ -499,7 +519,7 @@ static void fill_buffer(AVIOContext *s)
 
     /* make buffer smaller in case it ended up large after probing */
     if (s->buffer_size > max_buffer_size) {
-        url_setbufsize(s, max_buffer_size);
+        ffio_set_buf_size(s, max_buffer_size);
 
         s->checksum_ptr = dst = s->buffer;
         len = s->buffer_size;
@@ -762,7 +782,7 @@ uint64_t avio_rb64(AVIOContext *s)
     return val;
 }
 
-uint64_t ff_get_v(AVIOContext *bc){
+uint64_t ffio_read_varlen(AVIOContext *bc){
     uint64_t val = 0;
     int tmp;
 
@@ -810,7 +830,7 @@ int url_fdopen(AVIOContext **s, URLContext *h)
     return 0;
 }
 
-int url_setbufsize(AVIOContext *s, int buf_size)
+int ffio_set_buf_size(AVIOContext *s, int buf_size)
 {
     uint8_t *buffer;
     buffer = av_malloc(buf_size);
@@ -917,8 +937,7 @@ URLContext *url_fileno(AVIOContext *s)
     return s->opaque;
 }
 
-#if CONFIG_MUXERS
-int url_fprintf(AVIOContext *s, const char *fmt, ...)
+int avio_printf(AVIOContext *s, const char *fmt, ...)
 {
     va_list ap;
     char buf[4096];
@@ -930,7 +949,6 @@ int url_fprintf(AVIOContext *s, const char *fmt, ...)
     avio_write(s, buf, strlen(buf));
     return ret;
 }
-#endif //CONFIG_MUXERS
 
 #if FF_API_OLD_AVIO
 char *url_fgets(AVIOContext *s, char *buf, int buf_size)
@@ -991,6 +1009,7 @@ int64_t av_url_read_fseek(AVIOContext *s, int stream_index,
  * back to the server even if CONFIG_MUXERS is false. */
 #if CONFIG_MUXERS || CONFIG_NETWORK
 /* buffer handling */
+#if FF_API_OLD_AVIO
 int url_open_buf(AVIOContext **s, uint8_t *buf, int buf_size, int flags)
 {
     int ret;
@@ -1007,9 +1026,10 @@ int url_open_buf(AVIOContext **s, uint8_t *buf, int buf_size, int flags)
 
 int url_close_buf(AVIOContext *s)
 {
-    put_flush_packet(s);
+    avio_flush(s);
     return s->buf_ptr - s->buffer;
 }
+#endif
 
 /* output in a dynamic buffer */
 
@@ -1134,7 +1154,7 @@ int url_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
         padding = FF_INPUT_BUFFER_PADDING_SIZE;
     }
 
-    put_flush_packet(s);
+    avio_flush(s);
 
     *pbuffer = d->buffer;
     size = d->size;
diff --git a/libavformat/avs.c b/libavformat/avs.c
index 0ddb0af06d..355ae31f35 100644
--- a/libavformat/avs.c
+++ b/libavformat/avs.c
@@ -61,7 +61,7 @@ static int avs_read_header(AVFormatContext * s, AVFormatParameters * ap)
 
     s->ctx_flags |= AVFMTCTX_NOHEADER;
 
-    avio_seek(s->pb, 4, SEEK_CUR);
+    avio_skip(s->pb, 4);
     avs->width = avio_rl16(s->pb);
     avs->height = avio_rl16(s->pb);
     avs->bits_per_sample = avio_rl16(s->pb);
@@ -204,7 +204,7 @@ static int avs_read_packet(AVFormatContext * s, AVPacket * pkt)
                 break;
 
             default:
-                avio_seek(s->pb, size - 4, SEEK_CUR);
+                avio_skip(s->pb, size - 4);
             }
         }
     }
diff --git a/libavformat/bethsoftvid.c b/libavformat/bethsoftvid.c
index 7987e8e6f6..399d627121 100644
--- a/libavformat/bethsoftvid.c
+++ b/libavformat/bethsoftvid.c
@@ -67,7 +67,7 @@ static int vid_read_header(AVFormatContext *s,
     *    bytes: 'V' 'I' 'D'
     *    int16s: always_512, nframes, width, height, delay, always_14
     */
-    avio_seek(pb, 5, SEEK_CUR);
+    avio_skip(pb, 5);
     vid->nframes = avio_rl16(pb);
 
     stream = av_new_stream(s, 0);
diff --git a/libavformat/bfi.c b/libavformat/bfi.c
index 21676e440a..843ba9972e 100644
--- a/libavformat/bfi.c
+++ b/libavformat/bfi.c
@@ -65,19 +65,19 @@ static int bfi_read_header(AVFormatContext * s, AVFormatParameters * ap)
         return AVERROR(ENOMEM);
 
     /* Set the total number of frames. */
-    avio_seek(pb, 8, SEEK_CUR);
+    avio_skip(pb, 8);
     chunk_header           = avio_rl32(pb);
     bfi->nframes           = avio_rl32(pb);
     avio_rl32(pb);
     avio_rl32(pb);
     avio_rl32(pb);
     fps                    = avio_rl32(pb);
-    avio_seek(pb, 12, SEEK_CUR);
+    avio_skip(pb, 12);
     vstream->codec->width  = avio_rl32(pb);
     vstream->codec->height = avio_rl32(pb);
 
     /*Load the palette to extradata */
-    avio_seek(pb, 8, SEEK_CUR);
+    avio_skip(pb, 8);
     vstream->codec->extradata      = av_malloc(768);
     vstream->codec->extradata_size = 768;
     avio_read(pb, vstream->codec->extradata,
diff --git a/libavformat/bink.c b/libavformat/bink.c
index 22beb4cbbd..4622f89e5a 100644
--- a/libavformat/bink.c
+++ b/libavformat/bink.c
@@ -98,7 +98,7 @@ static int read_header(AVFormatContext *s, AVFormatParameters *ap)
         return AVERROR(EIO);
     }
 
-    avio_seek(pb, 4, SEEK_CUR);
+    avio_skip(pb, 4);
 
     vst->codec->width  = avio_rl32(pb);
     vst->codec->height = avio_rl32(pb);
@@ -127,7 +127,7 @@ static int read_header(AVFormatContext *s, AVFormatParameters *ap)
     }
 
     if (bink->num_audio_tracks) {
-        avio_seek(pb, 4 * bink->num_audio_tracks, SEEK_CUR);
+        avio_skip(pb, 4 * bink->num_audio_tracks);
 
         for (i = 0; i < bink->num_audio_tracks; i++) {
             ast = av_new_stream(s, 1);
@@ -169,7 +169,7 @@ static int read_header(AVFormatContext *s, AVFormatParameters *ap)
                            keyframe ? AVINDEX_KEYFRAME : 0);
     }
 
-    avio_seek(pb, 4, SEEK_CUR);
+    avio_skip(pb, 4);
 
     bink->current_track = -1;
     return 0;
@@ -225,7 +225,7 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt)
                     AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codec->channels);
             return 0;
         } else {
-            avio_seek(pb, audio_size, SEEK_CUR);
+            avio_skip(pb, audio_size);
         }
     }
 
diff --git a/libavformat/c93.c b/libavformat/c93.c
index a4a0fe3ad0..270a09bf6b 100644
--- a/libavformat/c93.c
+++ b/libavformat/c93.c
@@ -122,7 +122,7 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt)
                     return AVERROR(ENOMEM);
                 c93->audio->codec->codec_type = AVMEDIA_TYPE_AUDIO;
             }
-            avio_seek(pb, 26, SEEK_CUR); /* VOC header */
+            avio_skip(pb, 26); /* VOC header */
             ret = voc_get_packet(s, pkt, c93->audio, datasize - 26);
             if (ret > 0) {
                 pkt->stream_index = 1;
diff --git a/libavformat/cafdec.c b/libavformat/cafdec.c
index 829dff44bb..217f4db633 100644
--- a/libavformat/cafdec.c
+++ b/libavformat/cafdec.c
@@ -114,22 +114,22 @@ static int read_kuki_chunk(AVFormatContext *s, int64_t size)
             av_log(s, AV_LOG_ERROR, "invalid AAC magic cookie\n");
             return AVERROR_INVALIDDATA;
         }
-        avio_seek(pb, skip, SEEK_CUR);
+        avio_skip(pb, skip);
     } else if (st->codec->codec_id == CODEC_ID_ALAC) {
 #define ALAC_PREAMBLE 12
 #define ALAC_HEADER   36
         if (size < ALAC_PREAMBLE + ALAC_HEADER) {
             av_log(s, AV_LOG_ERROR, "invalid ALAC magic cookie\n");
-            avio_seek(pb, size, SEEK_CUR);
+            avio_skip(pb, size);
             return AVERROR_INVALIDDATA;
         }
-        avio_seek(pb, ALAC_PREAMBLE, SEEK_CUR);
+        avio_skip(pb, ALAC_PREAMBLE);
         st->codec->extradata = av_mallocz(ALAC_HEADER + FF_INPUT_BUFFER_PADDING_SIZE);
         if (!st->codec->extradata)
             return AVERROR(ENOMEM);
         avio_read(pb, st->codec->extradata, ALAC_HEADER);
         st->codec->extradata_size = ALAC_HEADER;
-        avio_seek(pb, size - ALAC_PREAMBLE - ALAC_HEADER, SEEK_CUR);
+        avio_skip(pb, size - ALAC_PREAMBLE - ALAC_HEADER);
     } else {
         st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
         if (!st->codec->extradata)
@@ -201,7 +201,7 @@ static int read_header(AVFormatContext *s,
     int found_data, ret;
     int64_t size;
 
-    avio_seek(pb, 8, SEEK_CUR); /* magic, version, file flags */
+    avio_skip(pb, 8); /* magic, version, file flags */
 
     /* audio description chunk */
     if (avio_rb32(pb) != MKBETAG('d','e','s','c')) {
@@ -233,11 +233,11 @@ static int read_header(AVFormatContext *s,
 
         switch (tag) {
         case MKBETAG('d','a','t','a'):
-            avio_seek(pb, 4, SEEK_CUR); /* edit count */
+            avio_skip(pb, 4); /* edit count */
             caf->data_start = avio_tell(pb);
             caf->data_size  = size < 0 ? -1 : size - 4;
             if (caf->data_size > 0 && !url_is_streamed(pb))
-                avio_seek(pb, caf->data_size, SEEK_CUR);
+                avio_skip(pb, caf->data_size);
             found_data = 1;
             break;
 
@@ -265,7 +265,7 @@ static int read_header(AVFormatContext *s,
         case MKBETAG('f','r','e','e'):
             if (size < 0)
                 return AVERROR_INVALIDDATA;
-            avio_seek(pb, size, SEEK_CUR);
+            avio_skip(pb, size);
             break;
         }
     }
diff --git a/libavformat/crcenc.c b/libavformat/crcenc.c
index ec106b0b38..b5fed3918d 100644
--- a/libavformat/crcenc.c
+++ b/libavformat/crcenc.c
@@ -50,7 +50,7 @@ static int crc_write_trailer(struct AVFormatContext *s)
 
     snprintf(buf, sizeof(buf), "CRC=0x%08x\n", crc->crcval);
     avio_write(s->pb, buf, strlen(buf));
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     return 0;
 }
 
diff --git a/libavformat/daud.c b/libavformat/daud.c
index 39a994b605..7aa1b6dad2 100644
--- a/libavformat/daud.c
+++ b/libavformat/daud.c
@@ -60,7 +60,7 @@ static int daud_write_packet(struct AVFormatContext *s, AVPacket *pkt)
     avio_wb16(s->pb, pkt->size);
     avio_wb16(s->pb, 0x8010); // unknown
     avio_write(s->pb, pkt->data, pkt->size);
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     return 0;
 }
 
diff --git a/libavformat/dvenc.c b/libavformat/dvenc.c
index 6d90024eef..0b80835fae 100644
--- a/libavformat/dvenc.c
+++ b/libavformat/dvenc.c
@@ -382,7 +382,7 @@ static int dv_write_packet(struct AVFormatContext *s, AVPacket *pkt)
                               pkt->data, pkt->size, &frame);
     if (fsize > 0) {
         avio_write(s->pb, frame, fsize);
-        put_flush_packet(s->pb);
+        avio_flush(s->pb);
     }
     return 0;
 }
diff --git a/libavformat/dxa.c b/libavformat/dxa.c
index de72792372..cf93df70d4 100644
--- a/libavformat/dxa.c
+++ b/libavformat/dxa.c
@@ -96,7 +96,7 @@ static int dxa_read_header(AVFormatContext *s, AVFormatParameters *ap)
         c->has_sound = 1;
         size = avio_rb32(pb);
         c->vidpos = avio_tell(pb) + size;
-        avio_seek(pb, 16, SEEK_CUR);
+        avio_skip(pb, 16);
         fsize = avio_rl32(pb);
 
         ast = av_new_stream(s, 0);
@@ -108,7 +108,7 @@ static int dxa_read_header(AVFormatContext *s, AVFormatParameters *ap)
             tag = avio_rl32(pb);
             fsize = avio_rl32(pb);
             if(tag == MKTAG('d', 'a', 't', 'a')) break;
-            avio_seek(pb, fsize, SEEK_CUR);
+            avio_skip(pb, fsize);
         }
         c->bpc = (fsize + c->frames - 1) / c->frames;
         if(ast->codec->block_align)
diff --git a/libavformat/eacdata.c b/libavformat/eacdata.c
index 8fc8c4221e..7b109ff888 100644
--- a/libavformat/eacdata.c
+++ b/libavformat/eacdata.c
@@ -62,7 +62,7 @@ static int cdata_read_header(AVFormatContext *s, AVFormatParameters *ap)
     };
 
     sample_rate = avio_rb16(pb);
-    avio_seek(pb, 12, SEEK_CUR);
+    avio_skip(pb, 12);
 
     st = av_new_stream(s, 0);
     if (!st)
diff --git a/libavformat/electronicarts.c b/libavformat/electronicarts.c
index 4abf0223e2..6585bbea2d 100644
--- a/libavformat/electronicarts.c
+++ b/libavformat/electronicarts.c
@@ -222,7 +222,7 @@ static int process_audio_header_eacs(AVFormatContext *s)
     ea->bytes        = avio_r8(pb);   /* 1=8-bit, 2=16-bit */
     ea->num_channels = avio_r8(pb);
     compression_type = avio_r8(pb);
-    avio_seek(pb, 13, SEEK_CUR);
+    avio_skip(pb, 13);
 
     switch (compression_type) {
     case 0:
@@ -261,7 +261,7 @@ static int process_video_header_mdec(AVFormatContext *s)
 {
     EaDemuxContext *ea = s->priv_data;
     AVIOContext *pb = s->pb;
-    avio_seek(pb, 4, SEEK_CUR);
+    avio_skip(pb, 4);
     ea->width  = avio_rl16(pb);
     ea->height = avio_rl16(pb);
     ea->time_base = (AVRational){1,15};
@@ -274,7 +274,7 @@ static int process_video_header_vp6(AVFormatContext *s)
     EaDemuxContext *ea = s->priv_data;
     AVIOContext *pb = s->pb;
 
-    avio_seek(pb, 16, SEEK_CUR);
+    avio_skip(pb, 16);
     ea->time_base.den = avio_rl32(pb);
     ea->time_base.num = avio_rl32(pb);
     ea->video_codec = CODEC_ID_VP6;
@@ -316,7 +316,7 @@ static int process_ea_header(AVFormatContext *s) {
             case SHEN_TAG :
                 blockid = avio_rl32(pb);
                 if (blockid == GSTR_TAG) {
-                    avio_seek(pb, 4, SEEK_CUR);
+                    avio_skip(pb, 4);
                 } else if ((blockid & 0xFFFF)!=PT00_TAG) {
                     av_log (s, AV_LOG_ERROR, "unknown SCHl headerid\n");
                     return 0;
@@ -474,19 +474,19 @@ static int ea_read_packet(AVFormatContext *s,
         /* audio data */
         case ISNh_TAG:
             /* header chunk also contains data; skip over the header portion*/
-            avio_seek(pb, 32, SEEK_CUR);
+            avio_skip(pb, 32);
             chunk_size -= 32;
         case ISNd_TAG:
         case SCDl_TAG:
         case SNDC_TAG:
         case SDEN_TAG:
             if (!ea->audio_codec) {
-                avio_seek(pb, chunk_size, SEEK_CUR);
+                avio_skip(pb, chunk_size);
                 break;
             } else if (ea->audio_codec == CODEC_ID_PCM_S16LE_PLANAR ||
                        ea->audio_codec == CODEC_ID_MP3) {
                 num_samples = avio_rl32(pb);
-                avio_seek(pb, 8, SEEK_CUR);
+                avio_skip(pb, 8);
                 chunk_size -= 12;
             }
             ret = av_get_packet(pb, pkt, chunk_size);
@@ -541,7 +541,7 @@ static int ea_read_packet(AVFormatContext *s,
             goto get_video_packet;
 
         case mTCD_TAG:
-            avio_seek(pb, 8, SEEK_CUR);  // skip ea dct header
+            avio_skip(pb, 8);  // skip ea dct header
             chunk_size -= 8;
             goto get_video_packet;
 
@@ -560,7 +560,7 @@ get_video_packet:
             break;
 
         default:
-            avio_seek(pb, chunk_size, SEEK_CUR);
+            avio_skip(pb, chunk_size);
             break;
         }
     }
diff --git a/libavformat/ffmdec.c b/libavformat/ffmdec.c
index eafe4802b7..a54bee059d 100644
--- a/libavformat/ffmdec.c
+++ b/libavformat/ffmdec.c
@@ -187,7 +187,7 @@ static int64_t get_dts(AVFormatContext *s, int64_t pos)
     int64_t dts;
 
     ffm_seek1(s, pos);
-    avio_seek(pb, 4, SEEK_CUR);
+    avio_skip(pb, 4);
     dts = avio_rb64(pb);
 #ifdef DEBUG_SEEK
     av_log(s, AV_LOG_DEBUG, "dts=%0.6f\n", dts / 1000000.0);
diff --git a/libavformat/ffmenc.c b/libavformat/ffmenc.c
index e648393c89..8071045467 100644
--- a/libavformat/ffmenc.c
+++ b/libavformat/ffmenc.c
@@ -44,7 +44,7 @@ static void flush_packet(AVFormatContext *s)
         h |= 0x8000;
     avio_wb16(pb, h);
     avio_write(pb, ffm->packet, ffm->packet_end - ffm->packet);
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     /* prepare next packet */
     ffm->frame_offset = 0; /* no key frame */
@@ -187,7 +187,7 @@ static int ffm_write_header(AVFormatContext *s)
     while ((avio_tell(pb) % ffm->packet_size) != 0)
         avio_w8(pb, 0);
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     /* init packet mux */
     ffm->packet_ptr = ffm->packet;
@@ -235,7 +235,7 @@ static int ffm_write_trailer(AVFormatContext *s)
     if (ffm->packet_ptr > ffm->packet)
         flush_packet(s);
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     return 0;
 }
diff --git a/libavformat/ffmetaenc.c b/libavformat/ffmetaenc.c
index 77db0b9bf8..596185b70c 100644
--- a/libavformat/ffmetaenc.c
+++ b/libavformat/ffmetaenc.c
@@ -53,7 +53,7 @@ static int write_header(AVFormatContext *s)
     avio_write(s->pb, ID_STRING, sizeof(ID_STRING) - 1);
     avio_w8(s->pb, '1');          // version
     avio_w8(s->pb, '\n');
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     return 0;
 }
 
@@ -73,13 +73,13 @@ static int write_trailer(AVFormatContext *s)
         AVChapter *ch = s->chapters[i];
         avio_write(s->pb, ID_CHAPTER, sizeof(ID_CHAPTER) - 1);
         avio_w8(s->pb, '\n');
-        url_fprintf(s->pb, "TIMEBASE=%d/%d\n", ch->time_base.num, ch->time_base.den);
-        url_fprintf(s->pb, "START=%"PRId64"\n", ch->start);
-        url_fprintf(s->pb, "END=%"PRId64"\n",   ch->end);
+        avio_printf(s->pb, "TIMEBASE=%d/%d\n", ch->time_base.num, ch->time_base.den);
+        avio_printf(s->pb, "START=%"PRId64"\n", ch->start);
+        avio_printf(s->pb, "END=%"PRId64"\n",   ch->end);
         write_tags(s->pb, ch->metadata);
     }
 
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
 
     return 0;
 }
diff --git a/libavformat/filmstripdec.c b/libavformat/filmstripdec.c
index 8d56b0e340..46d0635e9d 100644
--- a/libavformat/filmstripdec.c
+++ b/libavformat/filmstripdec.c
@@ -59,7 +59,7 @@ static int read_header(AVFormatContext *s,
         return AVERROR_INVALIDDATA;
     }
 
-    avio_seek(pb, 2, SEEK_CUR);
+    avio_skip(pb, 2);
     st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
     st->codec->codec_id   = CODEC_ID_RAWVIDEO;
     st->codec->pix_fmt    = PIX_FMT_RGBA;
@@ -84,7 +84,7 @@ static int read_packet(AVFormatContext *s,
         return AVERROR(EIO);
     pkt->dts = avio_tell(s->pb) / (st->codec->width * (st->codec->height + film->leading) * 4);
     pkt->size = av_get_packet(s->pb, pkt, st->codec->width * st->codec->height * 4);
-    avio_seek(s->pb, st->codec->width * film->leading * 4, SEEK_CUR);
+    avio_skip(s->pb, st->codec->width * film->leading * 4);
     if (pkt->size < 0)
         return pkt->size;
     pkt->flags |= AV_PKT_FLAG_KEY;
diff --git a/libavformat/filmstripenc.c b/libavformat/filmstripenc.c
index d20b4ecd4c..9bbc546eaf 100644
--- a/libavformat/filmstripenc.c
+++ b/libavformat/filmstripenc.c
@@ -67,7 +67,7 @@ static int write_trailer(AVFormatContext *s)
     avio_wb16(pb, 1/av_q2d(st->codec->time_base));
     for (i = 0; i < 16; i++)
         avio_w8(pb, 0x00);  // reserved
-    put_flush_packet(pb);
+    avio_flush(pb);
     return 0;
 }
 
diff --git a/libavformat/flacdec.c b/libavformat/flacdec.c
index 73eeacb422..3dd3e1f70f 100644
--- a/libavformat/flacdec.c
+++ b/libavformat/flacdec.c
@@ -65,7 +65,7 @@ static int flac_read_header(AVFormatContext *s,
             break;
         /* skip metadata block for unsupported types */
         default:
-            ret = avio_seek(s->pb, metadata_size, SEEK_CUR);
+            ret = avio_skip(s->pb, metadata_size);
             if (ret < 0)
                 return ret;
         }
diff --git a/libavformat/flacenc.c b/libavformat/flacenc.c
index 079e6dd713..e7605f5b23 100644
--- a/libavformat/flacenc.c
+++ b/libavformat/flacenc.c
@@ -104,7 +104,7 @@ static int flac_write_trailer(struct AVFormatContext *s)
         avio_seek(pb, 8, SEEK_SET);
         avio_write(pb, streaminfo, FLAC_STREAMINFO_SIZE);
         avio_seek(pb, file_size, SEEK_SET);
-        put_flush_packet(pb);
+        avio_flush(pb);
     } else {
         av_log(s, AV_LOG_WARNING, "unable to rewrite FLAC header.\n");
     }
@@ -114,7 +114,7 @@ static int flac_write_trailer(struct AVFormatContext *s)
 static int flac_write_packet(struct AVFormatContext *s, AVPacket *pkt)
 {
     avio_write(s->pb, pkt->data, pkt->size);
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     return 0;
 }
 
diff --git a/libavformat/flic.c b/libavformat/flic.c
index 520ba6423e..d6aadb7730 100644
--- a/libavformat/flic.c
+++ b/libavformat/flic.c
@@ -239,7 +239,7 @@ static int flic_read_packet(AVFormatContext *s,
             }
 
             /* skip useless 10B sub-header (yes, it's not accounted for in the chunk header) */
-            avio_seek(pb, 10, SEEK_CUR);
+            avio_skip(pb, 10);
 
             pkt->stream_index = flic->audio_stream_index;
             pkt->pos = avio_tell(pb);
@@ -253,7 +253,7 @@ static int flic_read_packet(AVFormatContext *s,
             packet_read = 1;
         } else {
             /* not interested in this chunk */
-            avio_seek(pb, size - 6, SEEK_CUR);
+            avio_skip(pb, size - 6);
         }
     }
 
diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c
index 7e02cdd3b4..d84051c7a8 100644
--- a/libavformat/flvdec.c
+++ b/libavformat/flvdec.c
@@ -113,7 +113,7 @@ static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_co
 static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) {
     int length = avio_rb16(ioc);
     if(length >= buffsize) {
-        avio_seek(ioc, length, SEEK_CUR);
+        avio_skip(ioc, length);
         return -1;
     }
 
@@ -149,7 +149,7 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vst
             unsigned int keylen;
 
             while(avio_tell(ioc) < max_pos - 2 && (keylen = avio_rb16(ioc))) {
-                avio_seek(ioc, keylen, SEEK_CUR); //skip key string
+                avio_skip(ioc, keylen); //skip key string
                 if(amf_parse_object(s, NULL, NULL, NULL, max_pos, depth + 1) < 0)
                     return -1; //if we couldn't skip, bomb out.
             }
@@ -162,7 +162,7 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vst
         case AMF_DATA_TYPE_UNSUPPORTED:
             break; //these take up no additional space
         case AMF_DATA_TYPE_MIXEDARRAY:
-            avio_seek(ioc, 4, SEEK_CUR); //skip 32-bit max array index
+            avio_skip(ioc, 4); //skip 32-bit max array index
             while(avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
                 //this is the only case in which we would want a nested parse to not skip over the object
                 if(amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0)
@@ -182,7 +182,7 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vst
         }
             break;
         case AMF_DATA_TYPE_DATE:
-            avio_seek(ioc, 8 + 2, SEEK_CUR); //timestamp (double) and UTC offset (int16)
+            avio_skip(ioc, 8 + 2); //timestamp (double) and UTC offset (int16)
             break;
         default: //unsupported type, we couldn't skip
             return -1;
@@ -254,7 +254,7 @@ static int flv_read_header(AVFormatContext *s,
 {
     int offset, flags;
 
-    avio_seek(s->pb, 4, SEEK_CUR);
+    avio_skip(s->pb, 4);
     flags = avio_r8(s->pb);
     /* old flvtool cleared this field */
     /* FIXME: better fix needed */
@@ -278,7 +278,7 @@ static int flv_read_header(AVFormatContext *s,
 
     offset = avio_rb32(s->pb);
     avio_seek(s->pb, offset, SEEK_SET);
-    avio_seek(s->pb, 4, SEEK_CUR);
+    avio_skip(s->pb, 4);
 
     s->start_time = 0;
 
@@ -304,7 +304,7 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
     int64_t dts, pts = AV_NOPTS_VALUE;
     AVStream *st = NULL;
 
- for(;;avio_seek(s->pb, 4, SEEK_CUR)){ /* pkt size is repeated at end. skip it */
+ for(;;avio_skip(s->pb, 4)){ /* pkt size is repeated at end. skip it */
     pos = avio_tell(s->pb);
     type = avio_r8(s->pb);
     size = avio_rb24(s->pb);
@@ -313,7 +313,7 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
 //    av_log(s, AV_LOG_DEBUG, "type:%d, size:%d, dts:%d\n", type, size, dts);
     if (url_feof(s->pb))
         return AVERROR_EOF;
-    avio_seek(s->pb, 3, SEEK_CUR); /* stream id, always 0 */
+    avio_skip(s->pb, 3); /* stream id, always 0 */
     flags = 0;
 
     if(size == 0)
@@ -454,7 +454,7 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
         pkt->flags |= AV_PKT_FLAG_KEY;
 
 leave:
-    avio_seek(s->pb, 4, SEEK_CUR);
+    avio_skip(s->pb, 4);
     return ret;
 }
 
diff --git a/libavformat/flvenc.c b/libavformat/flvenc.c
index 68da7f6907..b1e048551f 100644
--- a/libavformat/flvenc.c
+++ b/libavformat/flvenc.c
@@ -291,7 +291,7 @@ static int flv_write_header(AVFormatContext *s)
     data_size= avio_tell(pb) - metadata_size_pos - 10;
     avio_seek(pb, metadata_size_pos, SEEK_SET);
     avio_wb24(pb, data_size);
-    avio_seek(pb, data_size + 10 - 3, SEEK_CUR);
+    avio_skip(pb, data_size + 10 - 3);
     avio_wb32(pb, data_size + 11);
 
     for (i = 0; i < s->nb_streams; i++) {
@@ -318,7 +318,7 @@ static int flv_write_header(AVFormatContext *s)
             data_size = avio_tell(pb) - pos;
             avio_seek(pb, -data_size - 10, SEEK_CUR);
             avio_wb24(pb, data_size);
-            avio_seek(pb, data_size + 10 - 3, SEEK_CUR);
+            avio_skip(pb, data_size + 10 - 3);
             avio_wb32(pb, data_size + 11); // previous tag size
         }
     }
@@ -430,7 +430,7 @@ static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
     avio_wb32(pb,size+flags_size+11); // previous tag size
     flv->duration = FFMAX(flv->duration, pkt->pts + flv->delay + pkt->duration);
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     av_free(data);
 
diff --git a/libavformat/framecrcenc.c b/libavformat/framecrcenc.c
index 26ede95495..dcdfac882a 100644
--- a/libavformat/framecrcenc.c
+++ b/libavformat/framecrcenc.c
@@ -29,7 +29,7 @@ static int framecrc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
 
     snprintf(buf, sizeof(buf), "%d, %"PRId64", %d, 0x%08x\n", pkt->stream_index, pkt->dts, pkt->size, crc);
     avio_write(s->pb, buf, strlen(buf));
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     return 0;
 }
 
diff --git a/libavformat/gif.c b/libavformat/gif.c
index 17effaaa46..f5f8147e4f 100644
--- a/libavformat/gif.c
+++ b/libavformat/gif.c
@@ -287,7 +287,7 @@ static int gif_write_header(AVFormatContext *s)
 
     gif_image_write_header(pb, width, height, loop_count, NULL);
 
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     return 0;
 }
 
@@ -322,7 +322,7 @@ static int gif_write_video(AVFormatContext *s,
     gif_image_write_image(pb, 0, 0, enc->width, enc->height,
                           buf, enc->width * 3, PIX_FMT_RGB24);
 
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     return 0;
 }
 
@@ -340,7 +340,7 @@ static int gif_write_trailer(AVFormatContext *s)
     AVIOContext *pb = s->pb;
 
     avio_w8(pb, 0x3b);
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     return 0;
 }
 
diff --git a/libavformat/gxf.c b/libavformat/gxf.c
index dc0272d5c3..e278b9b846 100644
--- a/libavformat/gxf.c
+++ b/libavformat/gxf.c
@@ -174,7 +174,7 @@ static void gxf_material_tags(AVIOContext *pb, int *len, struct gxf_stream_info
             else if (tag == MAT_LAST_FIELD)
                 si->last_field = value;
         } else
-            avio_seek(pb, tlen, SEEK_CUR);
+            avio_skip(pb, tlen);
     }
 }
 
@@ -223,7 +223,7 @@ static void gxf_track_tags(AVIOContext *pb, int *len, struct gxf_stream_info *si
             else if (tag == TRACK_FPF && (value == 1 || value == 2))
                 si->fields_per_frame = value;
         } else
-            avio_seek(pb, tlen, SEEK_CUR);
+            avio_skip(pb, tlen);
     }
 }
 
@@ -238,7 +238,7 @@ static void gxf_read_index(AVFormatContext *s, int pkt_len) {
     int i;
     pkt_len -= 8;
     if (s->flags & AVFMT_FLAG_IGNIDX) {
-        avio_seek(pb, pkt_len, SEEK_CUR);
+        avio_skip(pb, pkt_len);
         return;
     }
     if (map_cnt > 1000) {
@@ -247,7 +247,7 @@ static void gxf_read_index(AVFormatContext *s, int pkt_len) {
     }
     if (pkt_len < 4 * map_cnt) {
         av_log(s, AV_LOG_ERROR, "invalid index length\n");
-        avio_seek(pb, pkt_len, SEEK_CUR);
+        avio_skip(pb, pkt_len);
         return;
     }
     pkt_len -= 4 * map_cnt;
@@ -255,7 +255,7 @@ static void gxf_read_index(AVFormatContext *s, int pkt_len) {
     for (i = 0; i < map_cnt; i++)
         av_add_index_entry(st, (uint64_t)avio_rl32(pb) * 1024,
                            i * (uint64_t)fields_per_map + 1, 0, 0, 0);
-    avio_seek(pb, pkt_len, SEEK_CUR);
+    avio_skip(pb, pkt_len);
 }
 
 static int gxf_header(AVFormatContext *s, AVFormatParameters *ap) {
@@ -283,7 +283,7 @@ static int gxf_header(AVFormatContext *s, AVFormatParameters *ap) {
     }
     map_len -= len;
     gxf_material_tags(pb, &len, &si);
-    avio_seek(pb, len, SEEK_CUR);
+    avio_skip(pb, len);
     map_len -= 2;
     len = avio_rb16(pb); // length of track description
     if (len > map_len) {
@@ -301,7 +301,7 @@ static int gxf_header(AVFormatContext *s, AVFormatParameters *ap) {
         track_len = avio_rb16(pb);
         len -= track_len;
         gxf_track_tags(pb, &track_len, &si);
-        avio_seek(pb, track_len, SEEK_CUR);
+        avio_skip(pb, track_len);
         if (!(track_type & 0x80)) {
            av_log(s, AV_LOG_ERROR, "invalid track type %x\n", track_type);
            continue;
@@ -326,7 +326,7 @@ static int gxf_header(AVFormatContext *s, AVFormatParameters *ap) {
     if (len < 0)
         av_log(s, AV_LOG_ERROR, "invalid track description length specified\n");
     if (map_len)
-        avio_seek(pb, map_len, SEEK_CUR);
+        avio_skip(pb, map_len);
     if (!parse_packet_header(pb, &pkt_type, &len)) {
         av_log(s, AV_LOG_ERROR, "sync lost in header\n");
         return -1;
@@ -342,8 +342,8 @@ static int gxf_header(AVFormatContext *s, AVFormatParameters *ap) {
         if (len >= 0x39) {
             AVRational fps;
             len -= 0x39;
-            avio_seek(pb, 5, SEEK_CUR); // preamble
-            avio_seek(pb, 0x30, SEEK_CUR); // payload description
+            avio_skip(pb, 5); // preamble
+            avio_skip(pb, 0x30); // payload description
             fps = fps_umf2avr(avio_rl32(pb));
             if (!main_timebase.num || !main_timebase.den) {
                 // this may not always be correct, but simply the best we can get
@@ -354,7 +354,7 @@ static int gxf_header(AVFormatContext *s, AVFormatParameters *ap) {
             av_log(s, AV_LOG_INFO, "UMF packet too short\n");
     } else
         av_log(s, AV_LOG_INFO, "UMF packet missing\n");
-    avio_seek(pb, len, SEEK_CUR);
+    avio_skip(pb, len);
     // set a fallback value, 60000/1001 is specified for audio-only files
     // so use that regardless of why we do not know the video frame rate.
     if (!main_timebase.num || !main_timebase.den)
@@ -437,7 +437,7 @@ static int gxf_packet(AVFormatContext *s, AVPacket *pkt) {
             continue;
         }
         if (pkt_type != PKT_MEDIA) {
-            avio_seek(pb, pkt_len, SEEK_CUR);
+            avio_skip(pb, pkt_len);
             continue;
         }
         if (pkt_len < 16) {
@@ -462,7 +462,7 @@ static int gxf_packet(AVFormatContext *s, AVPacket *pkt) {
             int last  = field_info & 0xffff; // last is exclusive
             int bps = av_get_bits_per_sample(st->codec->codec_id)>>3;
             if (first <= last && last*bps <= pkt_len) {
-                avio_seek(pb, first*bps, SEEK_CUR);
+                avio_skip(pb, first*bps);
                 skip = pkt_len - last*bps;
                 pkt_len = (last-first)*bps;
             } else
@@ -470,7 +470,7 @@ static int gxf_packet(AVFormatContext *s, AVPacket *pkt) {
         }
         ret = av_get_packet(pb, pkt, pkt_len);
         if (skip)
-            avio_seek(pb, skip, SEEK_CUR);
+            avio_skip(pb, skip);
         pkt->stream_index = stream_index;
         pkt->dts = field_nr;
         return ret;
diff --git a/libavformat/gxfenc.c b/libavformat/gxfenc.c
index 44b5020db0..e6c44d6fd9 100644
--- a/libavformat/gxfenc.c
+++ b/libavformat/gxfenc.c
@@ -753,7 +753,7 @@ static int gxf_write_header(AVFormatContext *s)
 
     gxf->packet_count = 3;
 
-    put_flush_packet(pb);
+    avio_flush(pb);
     return 0;
 }
 
@@ -781,12 +781,12 @@ static int gxf_write_trailer(AVFormatContext *s)
     gxf_write_map_packet(s, 1);
     gxf_write_flt_packet(s);
     gxf_write_umf_packet(s);
-    put_flush_packet(pb);
+    avio_flush(pb);
     /* update duration in all map packets */
     for (i = 1; i < gxf->map_offsets_nb; i++) {
         avio_seek(pb, gxf->map_offsets[i], SEEK_SET);
         gxf_write_map_packet(s, 1);
-        put_flush_packet(pb);
+        avio_flush(pb);
     }
 
     avio_seek(pb, end, SEEK_SET);
@@ -895,7 +895,7 @@ static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
         gxf->packet_count = 0;
     }
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     return 0;
 }
diff --git a/libavformat/id3v2.c b/libavformat/id3v2.c
index 4c61131c78..027b8d717c 100644
--- a/libavformat/id3v2.c
+++ b/libavformat/id3v2.c
@@ -136,6 +136,52 @@ static void read_ttag(AVFormatContext *s, AVIOContext *pb, int taglen, const cha
         av_metadata_set2(&s->metadata, key, val, AV_METADATA_DONT_OVERWRITE);
 }
 
+static int is_number(const char *str)
+{
+    while (*str >= '0' && *str <= '9') str++;
+    return !*str;
+}
+
+static AVMetadataTag* get_date_tag(AVMetadata *m, const char *tag)
+{
+    AVMetadataTag *t;
+    if ((t = av_metadata_get(m, tag, NULL, AV_METADATA_MATCH_CASE)) &&
+        strlen(t->value) == 4 && is_number(t->value))
+        return t;
+    return NULL;
+}
+
+static void merge_date(AVMetadata **m)
+{
+    AVMetadataTag *t;
+    char date[17] = {0};      // YYYY-MM-DD hh:mm
+
+    if (!(t = get_date_tag(*m, "TYER")) &&
+        !(t = get_date_tag(*m, "TYE")))
+        return;
+    av_strlcpy(date, t->value, 5);
+    av_metadata_set2(m, "TYER", NULL, 0);
+    av_metadata_set2(m, "TYE",  NULL, 0);
+
+    if (!(t = get_date_tag(*m, "TDAT")) &&
+        !(t = get_date_tag(*m, "TDA")))
+        goto finish;
+    snprintf(date + 4, sizeof(date) - 4, "-%.2s-%.2s", t->value + 2, t->value);
+    av_metadata_set2(m, "TDAT", NULL, 0);
+    av_metadata_set2(m, "TDA",  NULL, 0);
+
+    if (!(t = get_date_tag(*m, "TIME")) &&
+        !(t = get_date_tag(*m, "TIM")))
+        goto finish;
+    snprintf(date + 10, sizeof(date) - 10, " %.2s:%.2s", t->value, t->value + 2);
+    av_metadata_set2(m, "TIME", NULL, 0);
+    av_metadata_set2(m, "TIM",  NULL, 0);
+
+finish:
+    if (date[0])
+        av_metadata_set2(m, "date", date, 0);
+}
+
 static void ff_id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t flags)
 {
     int isv34, unsync;
@@ -172,7 +218,7 @@ static void ff_id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t
     unsync = flags & 0x80;
 
     if (isv34 && flags & 0x40) /* Extended header present, just skip over it */
-        avio_seek(s->pb, get_size(s->pb, 4), SEEK_CUR);
+        avio_skip(s->pb, get_size(s->pb, 4));
 
     while (len >= taghdrlen) {
         unsigned int tflags;
@@ -208,7 +254,7 @@ static void ff_id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t
 
         if (tflags & (ID3v2_FLAG_ENCRYPTION | ID3v2_FLAG_COMPRESSION)) {
             av_log(s, AV_LOG_WARNING, "Skipping encrypted/compressed ID3v2 frame %s.\n", tag);
-            avio_seek(s->pb, tlen, SEEK_CUR);
+            avio_skip(s->pb, tlen);
         } else if (tag[0] == 'T') {
             if (unsync || tunsync) {
                 int i, j;
@@ -229,7 +275,7 @@ static void ff_id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t
         else if (!tag[0]) {
             if (tag[1])
                 av_log(s, AV_LOG_WARNING, "invalid frame id, assuming padding");
-            avio_seek(s->pb, tlen, SEEK_CUR);
+            avio_skip(s->pb, tlen);
             break;
         }
         /* Skip to end of tag */
@@ -238,10 +284,10 @@ static void ff_id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t
 
     if (len > 0) {
         /* Skip padding */
-        avio_seek(s->pb, len, SEEK_CUR);
+        avio_skip(s->pb, len);
     }
     if (version == 4 && flags & 0x10) /* Footer preset, always 10 bytes, skip over it */
-        avio_seek(s->pb, 10, SEEK_CUR);
+        avio_skip(s->pb, 10);
 
     av_free(buffer);
     return;
@@ -280,6 +326,7 @@ void ff_id3v2_read(AVFormatContext *s, const char *magic)
     ff_metadata_conv(&s->metadata, NULL, ff_id3v2_34_metadata_conv);
     ff_metadata_conv(&s->metadata, NULL, ff_id3v2_2_metadata_conv);
     ff_metadata_conv(&s->metadata, NULL, ff_id3v2_4_metadata_conv);
+    merge_date(&s->metadata);
 }
 
 const AVMetadataConv ff_id3v2_34_metadata_conv[] = {
diff --git a/libavformat/idcin.c b/libavformat/idcin.c
index 1aecf86669..fb07788655 100644
--- a/libavformat/idcin.c
+++ b/libavformat/idcin.c
@@ -257,7 +257,7 @@ static int idcin_read_packet(AVFormatContext *s,
 
         chunk_size = avio_rl32(pb);
         /* skip the number of decoded bytes (always equal to width * height) */
-        avio_seek(pb, 4, SEEK_CUR);
+        avio_skip(pb, 4);
         chunk_size -= 4;
         ret= av_get_packet(pb, pkt, chunk_size);
         if (ret < 0)
diff --git a/libavformat/idroqdec.c b/libavformat/idroqdec.c
index 391db609b7..cbf3b3ed8d 100644
--- a/libavformat/idroqdec.c
+++ b/libavformat/idroqdec.c
@@ -136,14 +136,14 @@ static int roq_read_packet(AVFormatContext *s,
                 break;
             }
             /* don't care about this chunk anymore */
-            avio_seek(pb, RoQ_CHUNK_PREAMBLE_SIZE, SEEK_CUR);
+            avio_skip(pb, RoQ_CHUNK_PREAMBLE_SIZE);
             break;
 
         case RoQ_QUAD_CODEBOOK:
             /* packet needs to contain both this codebook and next VQ chunk */
             codebook_offset = avio_tell(pb) - RoQ_CHUNK_PREAMBLE_SIZE;
             codebook_size = chunk_size;
-            avio_seek(pb, codebook_size, SEEK_CUR);
+            avio_skip(pb, codebook_size);
             if (avio_read(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) !=
                 RoQ_CHUNK_PREAMBLE_SIZE)
                 return AVERROR(EIO);
diff --git a/libavformat/idroqenc.c b/libavformat/idroqenc.c
index 9935b61e1b..3e8f179846 100644
--- a/libavformat/idroqenc.c
+++ b/libavformat/idroqenc.c
@@ -30,7 +30,7 @@ static int roq_write_header(struct AVFormatContext *s)
     };
 
     avio_write(s->pb, header, 8);
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
 
     return 0;
 }
diff --git a/libavformat/iff.c b/libavformat/iff.c
index dd69ce8ca5..24942122ad 100644
--- a/libavformat/iff.c
+++ b/libavformat/iff.c
@@ -134,7 +134,7 @@ static int iff_read_header(AVFormatContext *s,
         return AVERROR(ENOMEM);
 
     st->codec->channels = 1;
-    avio_seek(pb, 8, SEEK_CUR);
+    avio_skip(pb, 8);
     // codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content
     st->codec->codec_tag = avio_rl32(pb);
 
@@ -152,10 +152,10 @@ static int iff_read_header(AVFormatContext *s,
 
             if (data_size < 14)
                 return AVERROR_INVALIDDATA;
-            avio_seek(pb, 12, SEEK_CUR);
+            avio_skip(pb, 12);
             st->codec->sample_rate = avio_rb16(pb);
             if (data_size >= 16) {
-                avio_seek(pb, 1, SEEK_CUR);
+                avio_skip(pb, 1);
                 compression        = avio_r8(pb);
             }
             break;
@@ -186,14 +186,14 @@ static int iff_read_header(AVFormatContext *s,
                 return AVERROR_INVALIDDATA;
             st->codec->width                 = avio_rb16(pb);
             st->codec->height                = avio_rb16(pb);
-            avio_seek(pb, 4, SEEK_CUR); // x, y offset
+            avio_skip(pb, 4); // x, y offset
             st->codec->bits_per_coded_sample = avio_r8(pb);
             if (data_size >= 11) {
-                avio_seek(pb, 1, SEEK_CUR); // masking
+                avio_skip(pb, 1); // masking
                 compression                  = avio_r8(pb);
             }
             if (data_size >= 16) {
-                avio_seek(pb, 3, SEEK_CUR); // paddding, transparent
+                avio_skip(pb, 3); // paddding, transparent
                 st->sample_aspect_ratio.num  = avio_r8(pb);
                 st->sample_aspect_ratio.den  = avio_r8(pb);
             }
@@ -223,7 +223,7 @@ static int iff_read_header(AVFormatContext *s,
                 return res;
             }
         }
-        avio_seek(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1), SEEK_CUR);
+        avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1));
     }
 
     avio_seek(pb, iff->body_pos, SEEK_SET);
diff --git a/libavformat/img2.c b/libavformat/img2.c
index c909078ecf..f9c71b97f2 100644
--- a/libavformat/img2.c
+++ b/libavformat/img2.c
@@ -372,8 +372,8 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
         avio_write(pb[0], pkt->data        , ysize);
         avio_write(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
         avio_write(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
-        put_flush_packet(pb[1]);
-        put_flush_packet(pb[2]);
+        avio_flush(pb[1]);
+        avio_flush(pb[2]);
         avio_close(pb[1]);
         avio_close(pb[2]);
     }else{
@@ -402,7 +402,7 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
         }
         avio_write(pb[0], pkt->data, pkt->size);
     }
-    put_flush_packet(pb[0]);
+    avio_flush(pb[0]);
     if (!img->is_pipe) {
         avio_close(pb[0]);
     }
diff --git a/libavformat/ingenientdec.c b/libavformat/ingenientdec.c
index eb24da9cac..eb1e6f6521 100644
--- a/libavformat/ingenientdec.c
+++ b/libavformat/ingenientdec.c
@@ -35,11 +35,11 @@ static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
     w = avio_rl16(s->pb);
     h = avio_rl16(s->pb);
 
-    avio_seek(s->pb, 8, SEEK_CUR); // zero + size (padded?)
-    avio_seek(s->pb, 2, SEEK_CUR);
+    avio_skip(s->pb, 8); // zero + size (padded?)
+    avio_skip(s->pb, 2);
     unk1 = avio_rl16(s->pb);
     unk2 = avio_rl16(s->pb);
-    avio_seek(s->pb, 22, SEEK_CUR); // ASCII timestamp
+    avio_skip(s->pb, 22); // ASCII timestamp
 
     av_log(s, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
         size, w, h, unk1, unk2);
diff --git a/libavformat/internal.h b/libavformat/internal.h
index 02a27e4724..d5bfc33187 100644
--- a/libavformat/internal.h
+++ b/libavformat/internal.h
@@ -239,4 +239,15 @@ AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base,
  */
 void ff_reduce_index(AVFormatContext *s, int stream_index);
 
+/*
+ * Convert a relative url into an absolute url, given a base url.
+ *
+ * @param buf the buffer where output absolute url is written
+ * @param size the size of buf
+ * @param base the base url, may be equal to buf.
+ * @param rel the new url, which is interpreted relative to base
+ */
+void ff_make_absolute_url(char *buf, int size, const char *base,
+                          const char *rel);
+
 #endif /* AVFORMAT_INTERNAL_H */
diff --git a/libavformat/ipmovie.c b/libavformat/ipmovie.c
index b54df38b23..8ea59a3b08 100644
--- a/libavformat/ipmovie.c
+++ b/libavformat/ipmovie.c
@@ -299,12 +299,12 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
 
         case OPCODE_END_OF_STREAM:
             debug_ipmovie("end of stream\n");
-            avio_seek(pb, opcode_size, SEEK_CUR);
+            avio_skip(pb, opcode_size);
             break;
 
         case OPCODE_END_OF_CHUNK:
             debug_ipmovie("end of chunk\n");
-            avio_seek(pb, opcode_size, SEEK_CUR);
+            avio_skip(pb, opcode_size);
             break;
 
         case OPCODE_CREATE_TIMER:
@@ -359,7 +359,7 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
 
         case OPCODE_START_STOP_AUDIO:
             debug_ipmovie("start/stop audio\n");
-            avio_seek(pb, opcode_size, SEEK_CUR);
+            avio_skip(pb, opcode_size);
             break;
 
         case OPCODE_INIT_VIDEO_BUFFERS:
@@ -393,12 +393,12 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
         case OPCODE_UNKNOWN_14:
         case OPCODE_UNKNOWN_15:
             debug_ipmovie("unknown (but documented) opcode %02X\n", opcode_type);
-            avio_seek(pb, opcode_size, SEEK_CUR);
+            avio_skip(pb, opcode_size);
             break;
 
         case OPCODE_SEND_BUFFER:
             debug_ipmovie("send buffer\n");
-            avio_seek(pb, opcode_size, SEEK_CUR);
+            avio_skip(pb, opcode_size);
             break;
 
         case OPCODE_AUDIO_FRAME:
@@ -407,22 +407,22 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
             /* log position and move on for now */
             s->audio_chunk_offset = avio_tell(pb);
             s->audio_chunk_size = opcode_size;
-            avio_seek(pb, opcode_size, SEEK_CUR);
+            avio_skip(pb, opcode_size);
             break;
 
         case OPCODE_SILENCE_FRAME:
             debug_ipmovie("silence frame\n");
-            avio_seek(pb, opcode_size, SEEK_CUR);
+            avio_skip(pb, opcode_size);
             break;
 
         case OPCODE_INIT_VIDEO_MODE:
             debug_ipmovie("initialize video mode\n");
-            avio_seek(pb, opcode_size, SEEK_CUR);
+            avio_skip(pb, opcode_size);
             break;
 
         case OPCODE_CREATE_GRADIENT:
             debug_ipmovie("create gradient\n");
-            avio_seek(pb, opcode_size, SEEK_CUR);
+            avio_skip(pb, opcode_size);
             break;
 
         case OPCODE_SET_PALETTE:
@@ -464,7 +464,7 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
 
         case OPCODE_SET_PALETTE_COMPRESSED:
             debug_ipmovie("set palette compressed\n");
-            avio_seek(pb, opcode_size, SEEK_CUR);
+            avio_skip(pb, opcode_size);
             break;
 
         case OPCODE_SET_DECODING_MAP:
@@ -473,7 +473,7 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
             /* log position and move on for now */
             s->decode_map_chunk_offset = avio_tell(pb);
             s->decode_map_chunk_size = opcode_size;
-            avio_seek(pb, opcode_size, SEEK_CUR);
+            avio_skip(pb, opcode_size);
             break;
 
         case OPCODE_VIDEO_DATA:
@@ -482,7 +482,7 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
             /* log position and move on for now */
             s->video_chunk_offset = avio_tell(pb);
             s->video_chunk_size = opcode_size;
-            avio_seek(pb, opcode_size, SEEK_CUR);
+            avio_skip(pb, opcode_size);
             break;
 
         default:
diff --git a/libavformat/iv8.c b/libavformat/iv8.c
index 4671a18eac..df5eb116c1 100644
--- a/libavformat/iv8.c
+++ b/libavformat/iv8.c
@@ -70,7 +70,7 @@ retry:
         return -1;
 
     if(type==258){
-        avio_seek(s->pb, size, SEEK_CUR);
+        avio_skip(s->pb, size);
         goto retry;
     }
 
diff --git a/libavformat/ivfenc.c b/libavformat/ivfenc.c
index 3913988144..5fffaf7959 100644
--- a/libavformat/ivfenc.c
+++ b/libavformat/ivfenc.c
@@ -53,7 +53,7 @@ static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt)
     avio_wl32(pb, pkt->size);
     avio_wl64(pb, pkt->pts);
     avio_write(pb, pkt->data, pkt->size);
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     return 0;
 }
diff --git a/libavformat/jvdec.c b/libavformat/jvdec.c
index 9235e51a99..175cd9f33b 100644
--- a/libavformat/jvdec.c
+++ b/libavformat/jvdec.c
@@ -139,7 +139,7 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt)
     AVIOContext *pb = s->pb;
     AVStream *ast = s->streams[0];
 
-    while (!url_feof(s->pb) && jv->pts < ast->nb_index_entries) {
+    while (!s->pb->eof_reached && jv->pts < ast->nb_index_entries) {
         const AVIndexEntry *e   = ast->index_entries + jv->pts;
         const JVFrame      *jvf = jv->frames + jv->pts;
 
diff --git a/libavformat/libnut.c b/libavformat/libnut.c
index 1c13e295f7..5e5831892a 100644
--- a/libavformat/libnut.c
+++ b/libavformat/libnut.c
@@ -48,7 +48,7 @@ static const AVCodecTag nut_tags[] = {
 static int av_write(void * h, size_t len, const uint8_t * buf) {
     AVIOContext * bc = h;
     avio_write(bc, buf, len);
-    //put_flush_packet(bc);
+    //avio_flush(bc);
     return len;
 }
 
@@ -142,7 +142,7 @@ static int nut_write_trailer(AVFormatContext * avf) {
     int i;
 
     nut_muxer_uninit_reorder(priv->nut);
-    put_flush_packet(bc);
+    avio_flush(bc);
 
     for(i = 0; priv->s[i].type != -1; i++ ) av_freep(&priv->s[i].fourcc);
     av_freep(&priv->s);
diff --git a/libavformat/lmlm4.c b/libavformat/lmlm4.c
index 97ece0153c..d68e6608ea 100644
--- a/libavformat/lmlm4.c
+++ b/libavformat/lmlm4.c
@@ -100,7 +100,7 @@ static int lmlm4_read_packet(AVFormatContext *s, AVPacket *pkt) {
     if ((ret = av_get_packet(pb, pkt, frame_size)) <= 0)
         return AVERROR(EIO);
 
-    avio_seek(pb, padding, SEEK_CUR);
+    avio_skip(pb, padding);
 
     switch (frame_type) {
         case LMLM4_I_FRAME:
diff --git a/libavformat/lxfdec.c b/libavformat/lxfdec.c
index 4e98c895cf..20978c674e 100644
--- a/libavformat/lxfdec.c
+++ b/libavformat/lxfdec.c
@@ -137,8 +137,8 @@ static int get_packet_header(AVFormatContext *s, uint8_t *header, uint32_t *form
     case 0:
         //video
         //skip VBI data and metadata
-        avio_seek(pb, (int64_t)(uint32_t)AV_RL32(&header[44]) +
-                      (int64_t)(uint32_t)AV_RL32(&header[52]), SEEK_CUR);
+        avio_skip(pb, (int64_t)(uint32_t)AV_RL32(&header[44]) +
+                      (int64_t)(uint32_t)AV_RL32(&header[52]));
         break;
     case 1:
         //audio
@@ -255,7 +255,7 @@ static int lxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
 
     if (format == 1) {
         //skip extended field data
-        avio_seek(s->pb, (uint32_t)AV_RL32(&header[40]), SEEK_CUR);
+        avio_skip(s->pb, (uint32_t)AV_RL32(&header[40]));
     }
 
     return 0;
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index d0fe98df0c..d99b6ed487 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -832,7 +832,7 @@ static int ebml_parse_elem(MatroskaDemuxContext *matroska,
                      return ebml_parse_nest(matroska, syntax->def.n, data);
     case EBML_PASS:  return ebml_parse_id(matroska, syntax->def.n, id, data);
     case EBML_STOP:  return 1;
-    default:         return avio_seek(pb,length,SEEK_CUR)<0 ? AVERROR(EIO) : 0;
+    default:         return avio_skip(pb,length)<0 ? AVERROR(EIO) : 0;
     }
     if (res == AVERROR_INVALIDDATA)
         av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
@@ -1394,10 +1394,10 @@ static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
             int flavor;
             ffio_init_context(&b, track->codec_priv.data,track->codec_priv.size,
                           0, NULL, NULL, NULL, NULL);
-            avio_seek(&b, 22, SEEK_CUR);
+            avio_skip(&b, 22);
             flavor                       = avio_rb16(&b);
             track->audio.coded_framesize = avio_rb32(&b);
-            avio_seek(&b, 12, SEEK_CUR);
+            avio_skip(&b, 12);
             track->audio.sub_packet_h    = avio_rb16(&b);
             track->audio.frame_size      = avio_rb16(&b);
             track->audio.sub_packet_size = avio_rb16(&b);
diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index 4c4f00958e..0c6e51c978 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -873,7 +873,7 @@ static int mkv_write_header(AVFormatContext *s)
     mkv->cur_audio_pkt.size = 0;
     mkv->audio_buffer_size  = 0;
 
-    put_flush_packet(pb);
+    avio_flush(pb);
     return 0;
 }
 
@@ -1172,7 +1172,7 @@ static int mkv_write_trailer(AVFormatContext *s)
     end_ebml_master(pb, mkv->segment);
     av_free(mkv->tracks);
     av_destruct_packet(&mkv->cur_audio_pkt);
-    put_flush_packet(pb);
+    avio_flush(pb);
     return 0;
 }
 
diff --git a/libavformat/md5enc.c b/libavformat/md5enc.c
index 065f7e8dc9..10b3d59581 100644
--- a/libavformat/md5enc.c
+++ b/libavformat/md5enc.c
@@ -37,7 +37,7 @@ static void md5_finish(struct AVFormatContext *s, char *buf)
     buf[offset+1] = 0;
 
     avio_write(s->pb, buf, strlen(buf));
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
 }
 
 #if CONFIG_MD5_MUXER
diff --git a/libavformat/mm.c b/libavformat/mm.c
index 699daac5e9..c6264f1cb7 100644
--- a/libavformat/mm.c
+++ b/libavformat/mm.c
@@ -102,7 +102,7 @@ static int read_header(AVFormatContext *s,
     avio_rl16(pb);   /* ibm-pc video bios mode */
     width = avio_rl16(pb);
     height = avio_rl16(pb);
-    avio_seek(pb, length - 10, SEEK_CUR);  /* unknown data */
+    avio_skip(pb, length - 10);  /* unknown data */
 
     /* video stream */
     st = av_new_stream(s, 0);
@@ -181,7 +181,7 @@ static int read_packet(AVFormatContext *s,
 
         default :
             av_log(s, AV_LOG_INFO, "unknown chunk type 0x%x\n", type);
-            avio_seek(pb, length, SEEK_CUR);
+            avio_skip(pb, length);
         }
     }
 
diff --git a/libavformat/mmf.c b/libavformat/mmf.c
index 0f5cee4f71..4605bf7fbd 100644
--- a/libavformat/mmf.c
+++ b/libavformat/mmf.c
@@ -102,7 +102,7 @@ static int mmf_write_header(AVFormatContext *s)
 
     av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     return 0;
 }
@@ -160,7 +160,7 @@ static int mmf_write_trailer(AVFormatContext *s)
 
         avio_seek(pb, pos, SEEK_SET);
 
-        put_flush_packet(pb);
+        avio_flush(pb);
     }
     return 0;
 }
@@ -195,7 +195,7 @@ static int mmf_read_header(AVFormatContext *s,
     file_size = avio_rb32(pb);
 
     /* Skip some unused chunks that may or may not be present */
-    for(;; avio_seek(pb, size, SEEK_CUR)) {
+    for(;; avio_skip(pb, size)) {
         tag = avio_rl32(pb);
         size = avio_rb32(pb);
         if(tag == MKTAG('C','N','T','I')) continue;
@@ -226,7 +226,7 @@ static int mmf_read_header(AVFormatContext *s,
     avio_r8(pb); /* time base g */
 
     /* Skip some unused chunks that may or may not be present */
-    for(;; avio_seek(pb, size, SEEK_CUR)) {
+    for(;; avio_skip(pb, size)) {
         tag = avio_rl32(pb);
         size = avio_rb32(pb);
         if(tag == MKTAG('A','t','s','q')) continue;
diff --git a/libavformat/mov.c b/libavformat/mov.c
index d3e95980a9..23ba1d47f0 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -296,7 +296,7 @@ static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
             parse = mov_read_udta_string;
 
         if (!parse) { /* skip leaf atoms data */
-            avio_seek(pb, a.size, SEEK_CUR);
+            avio_skip(pb, a.size);
         } else {
             int64_t start_pos = avio_tell(pb);
             int64_t left;
@@ -308,14 +308,14 @@ static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
                 return 0;
             left = a.size - avio_tell(pb) + start_pos;
             if (left > 0) /* skip garbage at atom end */
-                avio_seek(pb, left, SEEK_CUR);
+                avio_skip(pb, left);
         }
 
         total_size += a.size;
     }
 
     if (total_size < atom.size && atom.size < 0x7ffff)
-        avio_seek(pb, atom.size - total_size, SEEK_CUR);
+        avio_skip(pb, atom.size - total_size);
 
     return 0;
 }
@@ -357,7 +357,7 @@ static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
             uint16_t volume_len, len;
             int16_t type;
 
-            avio_seek(pb, 10, SEEK_CUR);
+            avio_skip(pb, 10);
 
             volume_len = avio_r8(pb);
             volume_len = FFMIN(volume_len, 27);
@@ -365,7 +365,7 @@ static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
             dref->volume[volume_len] = 0;
             av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
 
-            avio_seek(pb, 12, SEEK_CUR);
+            avio_skip(pb, 12);
 
             len = avio_r8(pb);
             len = FFMIN(len, 63);
@@ -373,7 +373,7 @@ static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
             dref->filename[len] = 0;
             av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
 
-            avio_seek(pb, 16, SEEK_CUR);
+            avio_skip(pb, 16);
 
             /* read next level up_from_alias/down_to_target */
             dref->nlvl_from = avio_rb16(pb);
@@ -381,7 +381,7 @@ static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
             av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
                    dref->nlvl_from, dref->nlvl_to);
 
-            avio_seek(pb, 16, SEEK_CUR);
+            avio_skip(pb, 16);
 
             for (type = 0; type != -1 && avio_tell(pb) < next; ) {
                 type = avio_rb16(pb);
@@ -416,7 +416,7 @@ static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
                             dref->dir[j] = '/';
                     av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
                 } else
-                    avio_seek(pb, len, SEEK_CUR);
+                    avio_skip(pb, len);
             }
         }
         avio_seek(pb, next, SEEK_SET);
@@ -663,9 +663,9 @@ static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
 
     avio_rb16(pb); /* preferred volume */
 
-    avio_seek(pb, 10, SEEK_CUR); /* reserved */
+    avio_skip(pb, 10); /* reserved */
 
-    avio_seek(pb, 36, SEEK_CUR); /* display matrix */
+    avio_skip(pb, 36); /* display matrix */
 
     avio_rb32(pb); /* preview time */
     avio_rb32(pb); /* preview duration */
@@ -782,7 +782,7 @@ static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
         if (mov_read_default(c, pb, atom) < 0)
             return -1;
     } else
-        avio_seek(pb, atom.size, SEEK_CUR);
+        avio_skip(pb, atom.size);
     return 0;
 }
 
@@ -833,7 +833,7 @@ static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     if (!st->codec->extradata)
         return AVERROR(ENOMEM);
     st->codec->extradata_size = atom.size - 40;
-    avio_seek(pb, 40, SEEK_CUR);
+    avio_skip(pb, 40);
     avio_read(pb, st->codec->extradata, atom.size - 40);
     return 0;
 }
@@ -945,7 +945,7 @@ int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
              * in the MOV demuxer, patch welcome. */
         multiple_stsd:
             av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
-            avio_seek(pb, size - (avio_tell(pb) - start_pos), SEEK_CUR);
+            avio_skip(pb, size - (avio_tell(pb) - start_pos));
             continue;
         }
         /* we cannot demux concatenated h264 streams because of different extradata */
@@ -1003,7 +1003,7 @@ int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
                 len = 31;
             mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
             if (len < 31)
-                avio_seek(pb, 31 - len, SEEK_CUR);
+                avio_skip(pb, 31 - len);
             /* codec_tag YV12 triggers an UV swap in rawdec.c */
             if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
                 st->codec->codec_tag=MKTAG('I', '4', '2', '0');
@@ -1174,7 +1174,7 @@ int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
             st->codec->height = sc->height;
         } else {
             /* other codec type, just skip (rtp, mp4s, tmcd ...) */
-            avio_seek(pb, size - (avio_tell(pb) - start_pos), SEEK_CUR);
+            avio_skip(pb, size - (avio_tell(pb) - start_pos));
         }
         /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
         a.size = size - (avio_tell(pb) - start_pos);
@@ -1182,7 +1182,7 @@ int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
             if (mov_read_default(c, pb, a) < 0)
                 return -1;
         } else if (a.size > 0)
-            avio_seek(pb, a.size, SEEK_CUR);
+            avio_skip(pb, a.size);
     }
 
     if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
@@ -2078,13 +2078,13 @@ static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     if (atom.size < 8)
         return 0; /* continue */
     if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
-        avio_seek(pb, atom.size - 4, SEEK_CUR);
+        avio_skip(pb, atom.size - 4);
         return 0;
     }
     atom.type = avio_rl32(pb);
     atom.size -= 8;
     if (atom.type != MKTAG('m','d','a','t')) {
-        avio_seek(pb, atom.size, SEEK_CUR);
+        avio_skip(pb, atom.size);
         return 0;
     }
     err = mov_read_mdat(c, pb, atom);
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 3742baf05e..cd93f45449 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -2043,7 +2043,7 @@ int ff_mov_write_packet(AVFormatContext *s, AVPacket *pkt)
     trk->sampleCount += samplesInChunk;
     mov->mdat_size += size;
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     if (trk->hint_track >= 0 && trk->hint_track < mov->nb_streams)
         ff_mov_add_hinted_packet(s, pkt, trk->hint_track, trk->entry);
@@ -2228,7 +2228,7 @@ static int mov_write_header(AVFormatContext *s)
         }
     }
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     return 0;
  error:
@@ -2272,7 +2272,7 @@ static int mov_write_trailer(AVFormatContext *s)
 
     }
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     av_freep(&mov->tracks);
 
diff --git a/libavformat/mp3dec.c b/libavformat/mp3dec.c
index 98dde547c8..b7386fb78f 100644
--- a/libavformat/mp3dec.c
+++ b/libavformat/mp3dec.c
@@ -107,7 +107,7 @@ static int mp3_parse_vbr_tags(AVFormatContext *s, AVStream *st, int64_t base)
         /* Check tag version */
         if(avio_rb16(s->pb) == 1) {
             /* skip delay and quality */
-            avio_seek(s->pb, 4, SEEK_CUR);
+            avio_skip(s->pb, 4);
             frames = avio_rb32(s->pb);
             size = avio_rb32(s->pb);
         }
diff --git a/libavformat/mp3enc.c b/libavformat/mp3enc.c
index 27d25f5da9..88b1475313 100644
--- a/libavformat/mp3enc.c
+++ b/libavformat/mp3enc.c
@@ -23,6 +23,7 @@
 #include "avformat.h"
 #include "id3v1.h"
 #include "id3v2.h"
+#include "rawenc.h"
 #include "libavutil/intreadwrite.h"
 #include "libavutil/opt.h"
 
@@ -125,14 +126,6 @@ static int id3v2_put_ttag(AVFormatContext *s, const char *str1, const char *str2
     return len + ID3v2_HEADER_SIZE;
 }
 
-
-static int mp3_write_packet(struct AVFormatContext *s, AVPacket *pkt)
-{
-    avio_write(s->pb, pkt->data, pkt->size);
-    put_flush_packet(s->pb);
-    return 0;
-}
-
 static int mp3_write_trailer(struct AVFormatContext *s)
 {
     uint8_t buf[ID3v1_TAG_SIZE];
@@ -140,7 +133,7 @@ static int mp3_write_trailer(struct AVFormatContext *s)
     /* write the id3v1 tag */
     if (id3v1_create_tag(s, buf) > 0) {
         avio_write(s->pb, buf, ID3v1_TAG_SIZE);
-        put_flush_packet(s->pb);
+        avio_flush(s->pb);
     }
     return 0;
 }
@@ -155,7 +148,7 @@ AVOutputFormat ff_mp2_muxer = {
     CODEC_ID_MP2,
     CODEC_ID_NONE,
     NULL,
-    mp3_write_packet,
+    ff_raw_write_packet,
     mp3_write_trailer,
 };
 #endif
@@ -254,7 +247,7 @@ AVOutputFormat ff_mp3_muxer = {
     CODEC_ID_MP3,
     CODEC_ID_NONE,
     mp3_write_header,
-    mp3_write_packet,
+    ff_raw_write_packet,
     mp3_write_trailer,
     AVFMT_NOTIMESTAMPS,
     .priv_class = &mp3_muxer_class,
diff --git a/libavformat/mpc8.c b/libavformat/mpc8.c
index b55bf49650..b18726c6db 100644
--- a/libavformat/mpc8.c
+++ b/libavformat/mpc8.c
@@ -22,6 +22,7 @@
 #include "libavcodec/get_bits.h"
 #include "libavcodec/unary.h"
 #include "avformat.h"
+#include "avio_internal.h"
 
 /// Two-byte MPC tag
 #define MKMPCTAG(a, b) (a | (b << 8))
@@ -122,7 +123,7 @@ static void mpc8_get_chunk_header(AVIOContext *pb, int *tag, int64_t *size)
     int64_t pos;
     pos = avio_tell(pb);
     *tag = avio_rl16(pb);
-    *size = ff_get_v(pb);
+    *size = ffio_read_varlen(pb);
     *size -= avio_tell(pb) - pos;
 }
 
@@ -177,12 +178,12 @@ static void mpc8_handle_chunk(AVFormatContext *s, int tag, int64_t chunk_pos, in
     switch(tag){
     case TAG_SEEKTBLOFF:
         pos = avio_tell(pb) + size;
-        off = ff_get_v(pb);
+        off = ffio_read_varlen(pb);
         mpc8_parse_seektable(s, chunk_pos + off);
         avio_seek(pb, pos, SEEK_SET);
         break;
     default:
-        avio_seek(pb, size, SEEK_CUR);
+        avio_skip(pb, size);
     }
 }
 
@@ -212,14 +213,14 @@ static int mpc8_read_header(AVFormatContext *s, AVFormatParameters *ap)
         return -1;
     }
     pos = avio_tell(pb);
-    avio_seek(pb, 4, SEEK_CUR); //CRC
+    avio_skip(pb, 4); //CRC
     c->ver = avio_r8(pb);
     if(c->ver != 8){
         av_log(s, AV_LOG_ERROR, "Unknown stream version %d\n", c->ver);
         return -1;
     }
-    c->samples = ff_get_v(pb);
-    ff_get_v(pb); //silence samples at the beginning
+    c->samples = ffio_read_varlen(pb);
+    ffio_read_varlen(pb); //silence samples at the beginning
 
     st = av_new_stream(s, 0);
     if (!st)
diff --git a/libavformat/mpeg.c b/libavformat/mpeg.c
index 740dbc94c0..3903949d5d 100644
--- a/libavformat/mpeg.c
+++ b/libavformat/mpeg.c
@@ -212,7 +212,7 @@ static long mpegps_psm_parse(MpegDemuxContext *m, AVIOContext *pb)
     ps_info_length = avio_rb16(pb);
 
     /* skip program_stream_info */
-    avio_seek(pb, ps_info_length, SEEK_CUR);
+    avio_skip(pb, ps_info_length);
     es_map_length = avio_rb16(pb);
 
     /* at least one es available? */
@@ -223,7 +223,7 @@ static long mpegps_psm_parse(MpegDemuxContext *m, AVIOContext *pb)
         /* remember mapping from stream id to stream type */
         m->psm_es_type[es_id] = type;
         /* skip program_stream_info */
-        avio_seek(pb, es_info_length, SEEK_CUR);
+        avio_skip(pb, es_info_length);
         es_map_length -= 4 + es_info_length;
     }
     avio_rb32(pb); /* crc32 */
@@ -264,7 +264,7 @@ static int mpegps_read_pes_header(AVFormatContext *s,
     if (startcode == SYSTEM_HEADER_START_CODE)
         goto redo;
     if (startcode == PADDING_STREAM) {
-        avio_seek(s->pb, avio_rb16(s->pb), SEEK_CUR);
+        avio_skip(s->pb, avio_rb16(s->pb));
         goto redo;
     }
     if (startcode == PRIVATE_STREAM_2) {
@@ -281,7 +281,7 @@ static int mpegps_read_pes_header(AVFormatContext *s,
             }
             m->sofdec -= !m->sofdec;
         }
-        avio_seek(s->pb, len, SEEK_CUR);
+        avio_skip(s->pb, len);
         goto redo;
     }
     if (startcode == PROGRAM_STREAM_MAP) {
@@ -359,7 +359,7 @@ static int mpegps_read_pes_header(AVFormatContext *s,
                 av_log(s, AV_LOG_WARNING, "pes_ext %X is invalid\n", pes_ext);
                 pes_ext=skip=0;
             }
-            avio_seek(s->pb, skip, SEEK_CUR);
+            avio_skip(s->pb, skip);
             header_len -= skip;
 
             if (pes_ext & 0x01) { /* PES extension 2 */
@@ -375,7 +375,7 @@ static int mpegps_read_pes_header(AVFormatContext *s,
         }
         if(header_len < 0)
             goto error_redo;
-        avio_seek(s->pb, header_len, SEEK_CUR);
+        avio_skip(s->pb, header_len);
     }
     else if( c!= 0xf )
         goto redo;
@@ -433,7 +433,7 @@ static int mpegps_read_packet(AVFormatContext *s,
 
     if(startcode == 0x1bd) {
         dvdaudio_substream_type = avio_r8(s->pb);
-        avio_seek(s->pb, 3, SEEK_CUR);
+        avio_skip(s->pb, 3);
         len -= 4;
     }
 
@@ -525,7 +525,7 @@ static int mpegps_read_packet(AVFormatContext *s,
     } else {
     skip:
         /* skip packet */
-        avio_seek(s->pb, len, SEEK_CUR);
+        avio_skip(s->pb, len);
         goto redo;
     }
     /* no stream found: add a new stream */
@@ -602,7 +602,7 @@ static int64_t mpegps_read_dts(AVFormatContext *s, int stream_index,
             dts != AV_NOPTS_VALUE) {
             break;
         }
-        avio_seek(s->pb, len, SEEK_CUR);
+        avio_skip(s->pb, len);
     }
 #ifdef DEBUG_SEEK
     printf("pos=0x%"PRIx64" dts=0x%"PRIx64" %0.3f\n", pos, dts, dts / 90000.0);
diff --git a/libavformat/mpegenc.c b/libavformat/mpegenc.c
index 8c5c644f42..0c86df1eea 100644
--- a/libavformat/mpegenc.c
+++ b/libavformat/mpegenc.c
@@ -936,7 +936,7 @@ static int flush_packet(AVFormatContext *ctx, int stream_index,
     for(i=0;i<zero_trail_bytes;i++)
         avio_w8(ctx->pb, 0x00);
 
-    put_flush_packet(ctx->pb);
+    avio_flush(ctx->pb);
 
     s->packet_number++;
 
@@ -965,7 +965,7 @@ static void put_vcd_padding_sector(AVFormatContext *ctx)
 
     s->vcd_padding_bytes_written += s->packet_size;
 
-    put_flush_packet(ctx->pb);
+    avio_flush(ctx->pb);
 
     /* increasing the packet number is correct. The SCR of the following packs
        is calculated from the packet_number and it has to include the padding
@@ -1221,7 +1221,7 @@ static int mpeg_mux_end(AVFormatContext *ctx)
        it as it is usually not needed by decoders and because it
        complicates MPEG stream concatenation. */
     //avio_wb32(ctx->pb, ISO_11172_END_CODE);
-    //put_flush_packet(ctx->pb);
+    //avio_flush(ctx->pb);
 
     for(i=0;i<ctx->nb_streams;i++) {
         stream = ctx->streams[i]->priv_data;
diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
index 2fed3cb34a..af0cadbb5a 100644
--- a/libavformat/mpegts.c
+++ b/libavformat/mpegts.c
@@ -1362,7 +1362,7 @@ static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size)
         } else {
             skip = raw_packet_size - TS_PACKET_SIZE;
             if (skip > 0)
-                avio_seek(pb, skip, SEEK_CUR);
+                avio_skip(pb, skip);
             break;
         }
     }
diff --git a/libavformat/mpegtsenc.c b/libavformat/mpegtsenc.c
index 11a840f8e4..3461a33a6a 100644
--- a/libavformat/mpegtsenc.c
+++ b/libavformat/mpegtsenc.c
@@ -579,7 +579,7 @@ static int mpegts_write_header(AVFormatContext *s)
            service->pcr_packet_period,
            ts->sdt_packet_period, ts->pat_packet_period);
 
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
 
     return 0;
 
@@ -865,7 +865,7 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
         payload_size -= len;
         avio_write(s->pb, buf, TS_PACKET_SIZE);
     }
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
 }
 
 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
@@ -988,7 +988,7 @@ static int mpegts_write_end(AVFormatContext *s)
         }
         av_freep(&ts_st->adts);
     }
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
 
     for(i = 0; i < ts->nb_services; i++) {
         service = ts->services[i];
diff --git a/libavformat/mpjpeg.c b/libavformat/mpjpeg.c
index e98fb363e7..e6f6bcc5f6 100644
--- a/libavformat/mpjpeg.c
+++ b/libavformat/mpjpeg.c
@@ -30,7 +30,7 @@ static int mpjpeg_write_header(AVFormatContext *s)
 
     snprintf(buf1, sizeof(buf1), "--%s\n", BOUNDARY_TAG);
     avio_write(s->pb, buf1, strlen(buf1));
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     return 0;
 }
 
@@ -44,7 +44,7 @@ static int mpjpeg_write_packet(AVFormatContext *s, AVPacket *pkt)
 
     snprintf(buf1, sizeof(buf1), "\n--%s\n", BOUNDARY_TAG);
     avio_write(s->pb, buf1, strlen(buf1));
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     return 0;
 }
 
diff --git a/libavformat/msnwc_tcp.c b/libavformat/msnwc_tcp.c
index c00ca43227..252ce34f6b 100644
--- a/libavformat/msnwc_tcp.c
+++ b/libavformat/msnwc_tcp.c
@@ -104,19 +104,19 @@ static int msnwc_tcp_read_packet(AVFormatContext *ctx, AVPacket *pkt)
     uint16_t keyframe;
     uint32_t size, timestamp;
 
-    avio_seek(pb, 1, SEEK_CUR); /* one byte has been read ahead */
-    avio_seek(pb, 2, SEEK_CUR);
-    avio_seek(pb, 2, SEEK_CUR);
+    avio_skip(pb, 1); /* one byte has been read ahead */
+    avio_skip(pb, 2);
+    avio_skip(pb, 2);
     keyframe = avio_rl16(pb);
     size = avio_rl32(pb);
-    avio_seek(pb, 4, SEEK_CUR);
-    avio_seek(pb, 4, SEEK_CUR);
+    avio_skip(pb, 4);
+    avio_skip(pb, 4);
     timestamp = avio_rl32(pb);
 
     if(!size || av_get_packet(pb, pkt, size) != size)
         return -1;
 
-    avio_seek(pb, 1, SEEK_CUR); /* Read ahead one byte of struct size like read_header */
+    avio_skip(pb, 1); /* Read ahead one byte of struct size like read_header */
 
     pkt->pts = timestamp;
     pkt->dts = timestamp;
diff --git a/libavformat/mtv.c b/libavformat/mtv.c
index 462ae202fc..76e0862cf4 100644
--- a/libavformat/mtv.c
+++ b/libavformat/mtv.c
@@ -83,10 +83,10 @@ static int mtv_read_header(AVFormatContext *s, AVFormatParameters *ap)
     AVStream        *st;
     unsigned int    audio_subsegments;
 
-    avio_seek(pb, 3, SEEK_CUR);
+    avio_skip(pb, 3);
     mtv->file_size         = avio_rl32(pb);
     mtv->segments          = avio_rl32(pb);
-    avio_seek(pb, 32, SEEK_CUR);
+    avio_skip(pb, 32);
     mtv->audio_identifier  = avio_rl24(pb);
     mtv->audio_br          = avio_rl16(pb);
     mtv->img_colorfmt      = avio_rl24(pb);
@@ -105,7 +105,7 @@ static int mtv_read_header(AVFormatContext *s, AVFormatParameters *ap)
         mtv->img_height=mtv->img_segment_size / (mtv->img_bpp>>3)
                         / mtv->img_width;
 
-    avio_seek(pb, 4, SEEK_CUR);
+    avio_skip(pb, 4);
     audio_subsegments = avio_rl16(pb);
     mtv->full_segment_size =
         audio_subsegments * (MTV_AUDIO_PADDING_SIZE + MTV_ASUBCHUNK_DATA_SIZE) +
@@ -164,7 +164,7 @@ static int mtv_read_packet(AVFormatContext *s, AVPacket *pkt)
 
     if((avio_tell(pb) - s->data_offset + mtv->img_segment_size) % mtv->full_segment_size)
     {
-        avio_seek(pb, MTV_AUDIO_PADDING_SIZE, SEEK_CUR);
+        avio_skip(pb, MTV_AUDIO_PADDING_SIZE);
 
         ret = av_get_packet(pb, pkt, MTV_ASUBCHUNK_DATA_SIZE);
         if(ret < 0)
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index 19a632b01a..6b44b8f3e3 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -262,7 +262,7 @@ static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv
         av_aes_init(mxf->aesc, s->key, 128, 1);
     }
     // crypto context
-    avio_seek(pb, klv_decode_ber_length(pb), SEEK_CUR);
+    avio_skip(pb, klv_decode_ber_length(pb));
     // plaintext offset
     klv_decode_ber_length(pb);
     plaintext_size = avio_rb64(pb);
@@ -297,7 +297,7 @@ static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv
                      &pkt->data[plaintext_size], size >> 4, ivec, 1);
     pkt->size = orig_size;
     pkt->stream_index = index;
-    avio_seek(pb, end - avio_tell(pb), SEEK_CUR);
+    avio_skip(pb, end - avio_tell(pb));
     return 0;
 }
 
@@ -339,7 +339,7 @@ static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
             return 0;
         } else
         skip:
-            avio_seek(s->pb, klv.length, SEEK_CUR);
+            avio_skip(s->pb, klv.length);
     }
     return AVERROR_EOF;
 }
@@ -397,7 +397,7 @@ static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int siz
         mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
         if (!mxf->packages_refs)
             return -1;
-        avio_seek(pb, 4, SEEK_CUR); /* useless size of objects, always 16 according to specs */
+        avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
         avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
         break;
     }
@@ -416,7 +416,7 @@ static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, U
         break;
     case 0x1101:
         /* UMID, only get last 16 bytes */
-        avio_seek(pb, 16, SEEK_CUR);
+        avio_skip(pb, 16);
         avio_read(pb, source_clip->source_package_uid, 16);
         break;
     case 0x1102:
@@ -437,7 +437,7 @@ static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int si
         package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
         if (!package->tracks_refs)
             return -1;
-        avio_seek(pb, 4, SEEK_CUR); /* useless size of objects, always 16 according to specs */
+        avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
         avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
         break;
     }
@@ -482,7 +482,7 @@ static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID
         sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
         if (!sequence->structural_components_refs)
             return -1;
-        avio_seek(pb, 4, SEEK_CUR); /* useless size of objects, always 16 according to specs */
+        avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
         avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
         break;
     }
@@ -500,12 +500,12 @@ static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size
         package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
         if (!package->tracks_refs)
             return -1;
-        avio_seek(pb, 4, SEEK_CUR); /* useless size of objects, always 16 according to specs */
+        avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
         avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
         break;
     case 0x4401:
         /* UMID, only get last 16 bytes */
-        avio_seek(pb, 16, SEEK_CUR);
+        avio_skip(pb, 16);
         avio_read(pb, package->package_uid, 16);
         break;
     case 0x4701:
@@ -558,7 +558,7 @@ static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int
         descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
         if (!descriptor->sub_descriptors_refs)
             return -1;
-        avio_seek(pb, 4, SEEK_CUR); /* useless size of objects, always 16 according to specs */
+        avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
         avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
         break;
     case 0x3004:
@@ -943,7 +943,7 @@ static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
             }
         }
         if (!metadata->read)
-            avio_seek(s->pb, klv.length, SEEK_CUR);
+            avio_skip(s->pb, klv.length);
     }
     return mxf_parse_structural_metadata(mxf);
 }
diff --git a/libavformat/mxfenc.c b/libavformat/mxfenc.c
index 8e1cfc7b0d..8cf5d93257 100644
--- a/libavformat/mxfenc.c
+++ b/libavformat/mxfenc.c
@@ -1272,7 +1272,7 @@ static void mxf_write_partition(AVFormatContext *s, int bodysid,
         avio_seek(pb, pos, SEEK_SET);
     }
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 }
 
 static const UID mxf_mpeg2_codec_uls[] = {
@@ -1731,7 +1731,7 @@ static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
         mxf->body_offset += 16+4+pkt->size + klv_fill_size(16+4+pkt->size);
     }
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     return 0;
 }
@@ -1795,7 +1795,7 @@ static int mxf_write_footer(AVFormatContext *s)
         }
     }
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     ff_audio_interleave_close(s);
 
diff --git a/libavformat/ncdec.c b/libavformat/ncdec.c
index 79a4dbafab..c95b4bde9d 100644
--- a/libavformat/ncdec.c
+++ b/libavformat/ncdec.c
@@ -73,7 +73,7 @@ static int nc_read_packet(AVFormatContext *s, AVPacket *pkt)
 
     avio_r8(s->pb);
     size = avio_rl16(s->pb);
-    avio_seek(s->pb, 9, SEEK_CUR);
+    avio_skip(s->pb, 9);
 
     if (size == 0) {
         av_log(s, AV_LOG_DEBUG, "Next packet size is zero\n");
diff --git a/libavformat/nsvdec.c b/libavformat/nsvdec.c
index 3bfebb263c..4b294d3591 100644
--- a/libavformat/nsvdec.c
+++ b/libavformat/nsvdec.c
@@ -584,7 +584,7 @@ null_chunk_retry:
               ((auxtag >> 16) & 0x0ff),
               ((auxtag >> 24) & 0x0ff),
               auxsize);
-        avio_seek(pb, auxsize, SEEK_CUR);
+        avio_skip(pb, auxsize);
         vsize -= auxsize + sizeof(uint16_t) + sizeof(uint32_t); /* that's becoming braindead */
     }
 
diff --git a/libavformat/nut.h b/libavformat/nut.h
index 7013fb126a..033bc0898e 100644
--- a/libavformat/nut.h
+++ b/libavformat/nut.h
@@ -82,6 +82,10 @@ typedef struct {
 } StreamContext;
 
 typedef struct {
+    AVRational *time_base;
+} ChapterContext;
+
+typedef struct {
     AVFormatContext *avf;
 //    int written_packet_size;
 //    int64_t packet_start;
@@ -90,6 +94,7 @@ typedef struct {
     const uint8_t *header[128];
     uint64_t next_startcode;     ///< stores the next startcode if it has already been parsed but the stream is not seekable
     StreamContext *stream;
+    ChapterContext *chapter;
     unsigned int max_distance;
     unsigned int time_base_count;
     int64_t last_syncpoint_pos;
diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c
index 107ff6815f..b957644f12 100644
--- a/libavformat/nutdec.c
+++ b/libavformat/nutdec.c
@@ -24,6 +24,7 @@
 #include "libavutil/avstring.h"
 #include "libavutil/bswap.h"
 #include "libavutil/tree.h"
+#include "avio_internal.h"
 #include "nut.h"
 
 #undef NDEBUG
@@ -36,7 +37,7 @@
 #endif
 
 static int get_str(AVIOContext *bc, char *string, unsigned int maxlen){
-    unsigned int len= ff_get_v(bc);
+    unsigned int len= ffio_read_varlen(bc);
 
     if(len && maxlen)
         avio_read(bc, string, FFMIN(len, maxlen));
@@ -55,14 +56,14 @@ static int get_str(AVIOContext *bc, char *string, unsigned int maxlen){
 }
 
 static int64_t get_s(AVIOContext *bc){
-    int64_t v = ff_get_v(bc) + 1;
+    int64_t v = ffio_read_varlen(bc) + 1;
 
     if (v&1) return -(v>>1);
     else     return  (v>>1);
 }
 
 static uint64_t get_fourcc(AVIOContext *bc){
-    unsigned int len= ff_get_v(bc);
+    unsigned int len= ffio_read_varlen(bc);
 
     if     (len==2) return avio_rl16(bc);
     else if(len==4) return avio_rl32(bc);
@@ -71,7 +72,7 @@ static uint64_t get_fourcc(AVIOContext *bc){
 
 #ifdef TRACE
 static inline uint64_t get_v_trace(AVIOContext *bc, char *file, char *func, int line){
-    uint64_t v= ff_get_v(bc);
+    uint64_t v= ffio_read_varlen(bc);
 
     av_log(NULL, AV_LOG_DEBUG, "get_v %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
     return v;
@@ -90,7 +91,7 @@ static inline uint64_t get_vb_trace(AVIOContext *bc, char *file, char *func, int
     av_log(NULL, AV_LOG_DEBUG, "get_vb %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
     return v;
 }
-#define ff_get_v(bc)  get_v_trace(bc, __FILE__, __PRETTY_FUNCTION__, __LINE__)
+#define ffio_read_varlen(bc)  get_v_trace(bc, __FILE__, __PRETTY_FUNCTION__, __LINE__)
 #define get_s(bc)  get_s_trace(bc, __FILE__, __PRETTY_FUNCTION__, __LINE__)
 #define get_vb(bc)  get_vb_trace(bc, __FILE__, __PRETTY_FUNCTION__, __LINE__)
 #endif
@@ -104,7 +105,7 @@ static int get_packetheader(NUTContext *nut, AVIOContext *bc, int calculate_chec
     startcode= ff_crc04C11DB7_update(0, (uint8_t*)&startcode, 8);
 
     init_checksum(bc, ff_crc04C11DB7_update, startcode);
-    size= ff_get_v(bc);
+    size= ffio_read_varlen(bc);
     if(size > 4096)
         avio_rb32(bc);
     if(get_checksum(bc) && size > 4096)
@@ -168,7 +169,7 @@ static int nut_probe(AVProbeData *p){
 }
 
 #define GET_V(dst, check) \
-    tmp= ff_get_v(bc);\
+    tmp= ffio_read_varlen(bc);\
     if(!(check)){\
         av_log(s, AV_LOG_ERROR, "Error " #dst " is (%"PRId64")\n", tmp);\
         return -1;\
@@ -201,7 +202,7 @@ static int decode_main_header(NUTContext *nut){
     GET_V(tmp              , tmp >=2 && tmp <= 3)
     GET_V(stream_count     , tmp > 0 && tmp <= NUT_MAX_STREAMS)
 
-    nut->max_distance = ff_get_v(bc);
+    nut->max_distance = ffio_read_varlen(bc);
     if(nut->max_distance > 65536){
         av_log(s, AV_LOG_DEBUG, "max_distance %d\n", nut->max_distance);
         nut->max_distance= 65536;
@@ -224,22 +225,22 @@ static int decode_main_header(NUTContext *nut){
     tmp_match= 1-(1LL<<62);
     tmp_head_idx= 0;
     for(i=0; i<256;){
-        int tmp_flags = ff_get_v(bc);
-        int tmp_fields= ff_get_v(bc);
+        int tmp_flags = ffio_read_varlen(bc);
+        int tmp_fields= ffio_read_varlen(bc);
         if(tmp_fields>0) tmp_pts   = get_s(bc);
-        if(tmp_fields>1) tmp_mul   = ff_get_v(bc);
-        if(tmp_fields>2) tmp_stream= ff_get_v(bc);
-        if(tmp_fields>3) tmp_size  = ff_get_v(bc);
+        if(tmp_fields>1) tmp_mul   = ffio_read_varlen(bc);
+        if(tmp_fields>2) tmp_stream= ffio_read_varlen(bc);
+        if(tmp_fields>3) tmp_size  = ffio_read_varlen(bc);
         else             tmp_size  = 0;
-        if(tmp_fields>4) tmp_res   = ff_get_v(bc);
+        if(tmp_fields>4) tmp_res   = ffio_read_varlen(bc);
         else             tmp_res   = 0;
-        if(tmp_fields>5) count     = ff_get_v(bc);
+        if(tmp_fields>5) count     = ffio_read_varlen(bc);
         else             count     = tmp_mul - tmp_size;
         if(tmp_fields>6) tmp_match = get_s(bc);
-        if(tmp_fields>7) tmp_head_idx= ff_get_v(bc);
+        if(tmp_fields>7) tmp_head_idx= ffio_read_varlen(bc);
 
         while(tmp_fields-- > 8)
-           ff_get_v(bc);
+           ffio_read_varlen(bc);
 
         if(count == 0 || i+count > 256){
             av_log(s, AV_LOG_ERROR, "illegal count %d at %d\n", count, i);
@@ -315,7 +316,7 @@ static int decode_stream_header(NUTContext *nut){
     if (!st)
         return AVERROR(ENOMEM);
 
-    class = ff_get_v(bc);
+    class = ffio_read_varlen(bc);
     tmp = get_fourcc(bc);
     st->codec->codec_tag= tmp;
     switch(class)
@@ -347,10 +348,10 @@ static int decode_stream_header(NUTContext *nut){
 
     GET_V(stc->time_base_id    , tmp < nut->time_base_count);
     GET_V(stc->msb_pts_shift   , tmp < 16);
-    stc->max_pts_distance= ff_get_v(bc);
+    stc->max_pts_distance= ffio_read_varlen(bc);
     GET_V(stc->decode_delay    , tmp < 1000); //sanity limit, raise this if Moore's law is true
     st->codec->has_b_frames= stc->decode_delay;
-    ff_get_v(bc); //stream flags
+    ffio_read_varlen(bc); //stream flags
 
     GET_V(st->codec->extradata_size, tmp < (1<<30));
     if(st->codec->extradata_size){
@@ -361,16 +362,16 @@ static int decode_stream_header(NUTContext *nut){
     if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
         GET_V(st->codec->width , tmp > 0)
         GET_V(st->codec->height, tmp > 0)
-        st->sample_aspect_ratio.num= ff_get_v(bc);
-        st->sample_aspect_ratio.den= ff_get_v(bc);
+        st->sample_aspect_ratio.num= ffio_read_varlen(bc);
+        st->sample_aspect_ratio.den= ffio_read_varlen(bc);
         if((!st->sample_aspect_ratio.num) != (!st->sample_aspect_ratio.den)){
             av_log(s, AV_LOG_ERROR, "invalid aspect ratio %d/%d\n", st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
             return -1;
         }
-        ff_get_v(bc); /* csp type */
+        ffio_read_varlen(bc); /* csp type */
     }else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO){
         GET_V(st->codec->sample_rate , tmp > 0)
-        ff_get_v(bc); // samplerate_den
+        ffio_read_varlen(bc); // samplerate_den
         GET_V(st->codec->channels, tmp > 0)
     }
     if(skip_reserved(bc, end) || get_checksum(bc)){
@@ -413,9 +414,9 @@ static int decode_info_header(NUTContext *nut){
 
     GET_V(stream_id_plus1, tmp <= s->nb_streams)
     chapter_id   = get_s(bc);
-    chapter_start= ff_get_v(bc);
-    chapter_len  = ff_get_v(bc);
-    count        = ff_get_v(bc);
+    chapter_start= ffio_read_varlen(bc);
+    chapter_len  = ffio_read_varlen(bc);
+    count        = ffio_read_varlen(bc);
 
     if(chapter_id && !stream_id_plus1){
         int64_t start= chapter_start / nut->time_base_count;
@@ -444,7 +445,7 @@ static int decode_info_header(NUTContext *nut){
             value= get_s(bc);
         }else if(value == -4){
             type= "t";
-            value= ff_get_v(bc);
+            value= ffio_read_varlen(bc);
         }else if(value < -4){
             type= "r";
             get_s(bc);
@@ -485,8 +486,8 @@ static int decode_syncpoint(NUTContext *nut, int64_t *ts, int64_t *back_ptr){
     end= get_packetheader(nut, bc, 1, SYNCPOINT_STARTCODE);
     end += avio_tell(bc);
 
-    tmp= ff_get_v(bc);
-    *back_ptr= nut->last_syncpoint_pos - 16*ff_get_v(bc);
+    tmp= ffio_read_varlen(bc);
+    *back_ptr= nut->last_syncpoint_pos - 16*ffio_read_varlen(bc);
     if(*back_ptr < 0)
         return -1;
 
@@ -523,12 +524,12 @@ static int find_and_decode_index(NUTContext *nut){
     end= get_packetheader(nut, bc, 1, INDEX_STARTCODE);
     end += avio_tell(bc);
 
-    ff_get_v(bc); //max_pts
+    ffio_read_varlen(bc); //max_pts
     GET_V(syncpoint_count, tmp < INT_MAX/8 && tmp > 0)
     syncpoints= av_malloc(sizeof(int64_t)*syncpoint_count);
     has_keyframe= av_malloc(sizeof(int8_t)*(syncpoint_count+1));
     for(i=0; i<syncpoint_count; i++){
-        syncpoints[i] = ff_get_v(bc);
+        syncpoints[i] = ffio_read_varlen(bc);
         if(syncpoints[i] <= 0)
             goto fail;
         if(i)
@@ -538,7 +539,7 @@ static int find_and_decode_index(NUTContext *nut){
     for(i=0; i<s->nb_streams; i++){
         int64_t last_pts= -1;
         for(j=0; j<syncpoint_count;){
-            uint64_t x= ff_get_v(bc);
+            uint64_t x= ffio_read_varlen(bc);
             int type= x&1;
             int n= j;
             x>>=1;
@@ -569,10 +570,10 @@ static int find_and_decode_index(NUTContext *nut){
             assert(n<=syncpoint_count+1);
             for(; j<n && j<syncpoint_count; j++){
                 if(has_keyframe[j]){
-                    uint64_t B, A= ff_get_v(bc);
+                    uint64_t B, A= ffio_read_varlen(bc);
                     if(!A){
-                        A= ff_get_v(bc);
-                        B= ff_get_v(bc);
+                        A= ffio_read_varlen(bc);
+                        B= ffio_read_varlen(bc);
                         //eor_pts[j][i] = last_pts + A + B
                     }else
                         B= 0;
@@ -687,13 +688,13 @@ static int decode_frame_header(NUTContext *nut, int64_t *pts, int *stream_id, ui
     if(flags & FLAG_INVALID)
         return AVERROR_INVALIDDATA;
     if(flags & FLAG_CODED)
-        flags ^= ff_get_v(bc);
+        flags ^= ffio_read_varlen(bc);
     if(flags & FLAG_STREAM_ID){
         GET_V(*stream_id, tmp < s->nb_streams)
     }
     stc= &nut->stream[*stream_id];
     if(flags&FLAG_CODED_PTS){
-        int coded_pts= ff_get_v(bc);
+        int coded_pts= ffio_read_varlen(bc);
 //FIXME check last_pts validity?
         if(coded_pts < (1<<stc->msb_pts_shift)){
             *pts=ff_lsb2full(stc, coded_pts);
@@ -702,16 +703,16 @@ static int decode_frame_header(NUTContext *nut, int64_t *pts, int *stream_id, ui
     }else
         *pts= stc->last_pts + pts_delta;
     if(flags&FLAG_SIZE_MSB){
-        size += size_mul*ff_get_v(bc);
+        size += size_mul*ffio_read_varlen(bc);
     }
     if(flags&FLAG_MATCH_TIME)
         get_s(bc);
     if(flags&FLAG_HEADER_IDX)
-        *header_idx= ff_get_v(bc);
+        *header_idx= ffio_read_varlen(bc);
     if(flags&FLAG_RESERVED)
-        reserved_count= ff_get_v(bc);
+        reserved_count= ffio_read_varlen(bc);
     for(i=0; i<reserved_count; i++)
-        ff_get_v(bc);
+        ffio_read_varlen(bc);
 
     if(*header_idx >= (unsigned)nut->header_count){
         av_log(s, AV_LOG_ERROR, "header_idx invalid\n");
@@ -757,7 +758,7 @@ static int decode_frame(NUTContext *nut, AVPacket *pkt, int frame_code){
        ||(discard >= AVDISCARD_BIDIR && last_IP_pts != AV_NOPTS_VALUE && last_IP_pts > pts)
        || discard >= AVDISCARD_ALL
        || stc->skip_until_key_frame){
-        avio_seek(bc, size, SEEK_CUR);
+        avio_skip(bc, size);
         return 1;
     }
 
@@ -803,7 +804,7 @@ static int nut_read_packet(AVFormatContext *s, AVPacket *pkt)
         case STREAM_STARTCODE:
         case INDEX_STARTCODE:
             skip= get_packetheader(nut, bc, 0, tmp);
-            avio_seek(bc, skip, SEEK_CUR);
+            avio_skip(bc, skip);
             break;
         case INFO_STARTCODE:
             if(decode_info_header(nut)<0)
diff --git a/libavformat/nutenc.c b/libavformat/nutenc.c
index 8ecefb012e..86701fa1aa 100644
--- a/libavformat/nutenc.c
+++ b/libavformat/nutenc.c
@@ -241,9 +241,9 @@ static void build_frame_code(AVFormatContext *s){
     nut->frame_code['N'].flags= FLAG_INVALID;
 }
 
-static void put_tt(NUTContext *nut, StreamContext *nus, AVIOContext *bc, uint64_t val){
+static void put_tt(NUTContext *nut, AVRational *time_base, AVIOContext *bc, uint64_t val){
     val *= nut->time_base_count;
-    val += nus->time_base - nut->time_base;
+    val += time_base - nut->time_base;
     ff_put_v(bc, val);
 }
 
@@ -486,6 +486,34 @@ static int write_streaminfo(NUTContext *nut, AVIOContext *bc, int stream_id){
     return count;
 }
 
+static int write_chapter(NUTContext *nut, AVIOContext *bc, int id)
+{
+    AVIOContext *dyn_bc;
+    uint8_t *dyn_buf = NULL;
+    AVMetadataTag *t = NULL;
+    AVChapter *ch    = nut->avf->chapters[id];
+    int ret, dyn_size, count = 0;
+
+    ret = url_open_dyn_buf(&dyn_bc);
+    if (ret < 0)
+        return ret;
+
+    ff_put_v(bc, 0);                                        // stream_id_plus1
+    put_s(bc, id + 1);                                      // chapter_id
+    put_tt(nut, nut->chapter[id].time_base, bc, ch->start); // chapter_start
+    ff_put_v(bc, ch->end - ch->start);                      // chapter_len
+
+    while ((t = av_metadata_get(ch->metadata, "", t, AV_METADATA_IGNORE_SUFFIX)))
+        count += add_info(dyn_bc, t->key, t->value);
+
+    ff_put_v(bc, count);
+
+    dyn_size = url_close_dyn_buf(dyn_bc, &dyn_buf);
+    avio_write(bc, dyn_buf, dyn_size);
+    av_freep(&dyn_buf);
+    return 0;
+}
+
 static int write_headers(AVFormatContext *avctx, AVIOContext *bc){
     NUTContext *nut = avctx->priv_data;
     AVIOContext *dyn_bc;
@@ -530,6 +558,20 @@ static int write_headers(AVFormatContext *avctx, AVIOContext *bc){
         }
     }
 
+    for (i = 0; i < nut->avf->nb_chapters; i++) {
+        ret = url_open_dyn_buf(&dyn_bc);
+        if (ret < 0)
+            return ret;
+        ret = write_chapter(nut, dyn_bc, i);
+        if (ret < 0) {
+            uint8_t *buf;
+            url_close_dyn_buf(dyn_bc, &buf);
+            av_freep(&buf);
+            return ret;
+        }
+        put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE);
+    }
+
     nut->last_syncpoint_pos= INT_MIN;
     nut->header_count++;
     return 0;
@@ -543,7 +585,9 @@ static int write_header(AVFormatContext *s){
     nut->avf= s;
 
     nut->stream   = av_mallocz(sizeof(StreamContext)*s->nb_streams);
-    nut->time_base= av_mallocz(sizeof(AVRational   )*s->nb_streams);
+    nut->chapter  = av_mallocz(sizeof(ChapterContext)*s->nb_chapters);
+    nut->time_base= av_mallocz(sizeof(AVRational   )*(s->nb_streams +
+                                                      s->nb_chapters));
 
     for(i=0; i<s->nb_streams; i++){
         AVStream *st= s->streams[i];
@@ -570,6 +614,20 @@ static int write_header(AVFormatContext *s){
         nut->stream[i].max_pts_distance= FFMAX(time_base.den, time_base.num) / time_base.num;
     }
 
+    for (i = 0; i < s->nb_chapters; i++) {
+        AVChapter *ch = s->chapters[i];
+
+        for (j = 0; j < nut->time_base_count; j++) {
+            if (!memcmp(&ch->time_base, &nut->time_base[j], sizeof(AVRational)))
+                break;
+        }
+
+        nut->time_base[j] = ch->time_base;
+        nut->chapter[i].time_base = &nut->time_base[j];
+        if(j == nut->time_base_count)
+            nut->time_base_count++;
+    }
+
     nut->max_distance = MAX_DISTANCE;
     build_elision_headers(s);
     build_frame_code(s);
@@ -581,7 +639,7 @@ static int write_header(AVFormatContext *s){
     if ((ret = write_headers(s, bc)) < 0)
         return ret;
 
-    put_flush_packet(bc);
+    avio_flush(bc);
 
     //FIXME index
 
@@ -672,7 +730,7 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt){
         ret = url_open_dyn_buf(&dyn_bc);
         if(ret < 0)
             return ret;
-        put_tt(nut, nus, dyn_bc, pkt->dts);
+        put_tt(nut, nus->time_base, dyn_bc, pkt->dts);
         ff_put_v(dyn_bc, sp ? (nut->last_syncpoint_pos - sp->pos)>>4 : 0);
         put_packet(nut, bc, dyn_bc, 1, SYNCPOINT_STARTCODE);
 
@@ -785,7 +843,7 @@ static int write_trailer(AVFormatContext *s){
 
     while(nut->header_count<3)
         write_headers(s, bc);
-    put_flush_packet(bc);
+    avio_flush(bc);
     ff_nut_free_sp(nut);
     av_freep(&nut->stream);
     av_freep(&nut->time_base);
diff --git a/libavformat/nuv.c b/libavformat/nuv.c
index 6f4a03192d..db31689753 100644
--- a/libavformat/nuv.c
+++ b/libavformat/nuv.c
@@ -66,7 +66,7 @@ static int get_codec_data(AVIOContext *pb, AVStream *vst,
         switch (frametype) {
             case NUV_EXTRADATA:
                 subtype = avio_r8(pb);
-                avio_seek(pb, 6, SEEK_CUR);
+                avio_skip(pb, 6);
                 size = PKTSIZE(avio_rl32(pb));
                 if (vst && subtype == 'R') {
                     vst->codec->extradata_size = size;
@@ -78,7 +78,7 @@ static int get_codec_data(AVIOContext *pb, AVStream *vst,
                 }
                 break;
             case NUV_MYTHEXT:
-                avio_seek(pb, 7, SEEK_CUR);
+                avio_skip(pb, 7);
                 size = PKTSIZE(avio_rl32(pb));
                 if (size != 128 * 4)
                     break;
@@ -90,7 +90,7 @@ static int get_codec_data(AVIOContext *pb, AVStream *vst,
                     if (vst->codec->codec_tag == MKTAG('R', 'J', 'P', 'G'))
                         vst->codec->codec_id = CODEC_ID_NUV;
                 } else
-                    avio_seek(pb, 4, SEEK_CUR);
+                    avio_skip(pb, 4);
 
                 if (ast) {
                     ast->codec->codec_tag = avio_rl32(pb);
@@ -102,20 +102,20 @@ static int get_codec_data(AVIOContext *pb, AVStream *vst,
                                          ast->codec->bits_per_coded_sample);
                     ast->need_parsing = AVSTREAM_PARSE_FULL;
                 } else
-                    avio_seek(pb, 4 * 4, SEEK_CUR);
+                    avio_skip(pb, 4 * 4);
 
                 size -= 6 * 4;
-                avio_seek(pb, size, SEEK_CUR);
+                avio_skip(pb, size);
                 return 1;
             case NUV_SEEKP:
                 size = 11;
                 break;
             default:
-                avio_seek(pb, 7, SEEK_CUR);
+                avio_skip(pb, 7);
                 size = PKTSIZE(avio_rl32(pb));
                 break;
         }
-        avio_seek(pb, size, SEEK_CUR);
+        avio_skip(pb, size);
     }
     return 0;
 }
@@ -130,14 +130,14 @@ static int nuv_header(AVFormatContext *s, AVFormatParameters *ap) {
     AVStream *vst = NULL, *ast = NULL;
     avio_read(pb, id_string, 12);
     is_mythtv = !memcmp(id_string, "MythTVVideo", 12);
-    avio_seek(pb, 5, SEEK_CUR); // version string
-    avio_seek(pb, 3, SEEK_CUR); // padding
+    avio_skip(pb, 5); // version string
+    avio_skip(pb, 3); // padding
     width = avio_rl32(pb);
     height = avio_rl32(pb);
     avio_rl32(pb); // unused, "desiredwidth"
     avio_rl32(pb); // unused, "desiredheight"
     avio_r8(pb); // 'P' == progressive, 'I' == interlaced
-    avio_seek(pb, 3, SEEK_CUR); // padding
+    avio_skip(pb, 3); // padding
     aspect = av_int2dbl(avio_rl64(pb));
     if (aspect > 0.9999 && aspect < 1.0001)
         aspect = 4.0 / 3.0;
@@ -206,13 +206,13 @@ static int nuv_packet(AVFormatContext *s, AVPacket *pkt) {
         switch (frametype) {
             case NUV_EXTRADATA:
                 if (!ctx->rtjpg_video) {
-                    avio_seek(pb, size, SEEK_CUR);
+                    avio_skip(pb, size);
                     break;
                 }
             case NUV_VIDEO:
                 if (ctx->v_id < 0) {
                     av_log(s, AV_LOG_ERROR, "Video packet in file without video stream!\n");
-                    avio_seek(pb, size, SEEK_CUR);
+                    avio_skip(pb, size);
                     break;
                 }
                 ret = av_new_packet(pkt, copyhdrsize + size);
@@ -236,7 +236,7 @@ static int nuv_packet(AVFormatContext *s, AVPacket *pkt) {
             case NUV_AUDIO:
                 if (ctx->a_id < 0) {
                     av_log(s, AV_LOG_ERROR, "Audio packet in file without audio stream!\n");
-                    avio_seek(pb, size, SEEK_CUR);
+                    avio_skip(pb, size);
                     break;
                 }
                 ret = av_get_packet(pb, pkt, size);
@@ -250,7 +250,7 @@ static int nuv_packet(AVFormatContext *s, AVPacket *pkt) {
                 // contains no data, size value is invalid
                 break;
             default:
-                avio_seek(pb, size, SEEK_CUR);
+                avio_skip(pb, size);
                 break;
         }
     }
diff --git a/libavformat/oggenc.c b/libavformat/oggenc.c
index 39e36c8b6b..fd88650629 100644
--- a/libavformat/oggenc.c
+++ b/libavformat/oggenc.c
@@ -99,14 +99,14 @@ static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags)
     avio_write(pb, page->data, page->size);
 
     ogg_update_checksum(s, pb, crc_offset);
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     size = url_close_dyn_buf(pb, &buf);
     if (size < 0)
         return size;
 
     avio_write(s->pb, buf, size);
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     av_free(buf);
     oggstream->page_count--;
     return 0;
diff --git a/libavformat/pva.c b/libavformat/pva.c
index a3b350e316..8e8c060a65 100644
--- a/libavformat/pva.c
+++ b/libavformat/pva.c
@@ -122,7 +122,7 @@ recover:
             if (pes_signal != 1) {
                 pva_log(s, AV_LOG_WARNING, "expected signaled PES packet, "
                                           "trying to recover\n");
-                avio_seek(pb, length - 9, SEEK_CUR);
+                avio_skip(pb, length - 9);
                 if (!read_packet)
                     return AVERROR(EIO);
                 goto recover;
diff --git a/libavformat/qcp.c b/libavformat/qcp.c
index fefc929279..b4f559ee11 100644
--- a/libavformat/qcp.c
+++ b/libavformat/qcp.c
@@ -93,7 +93,7 @@ static int qcp_read_header(AVFormatContext *s, AVFormatParameters *ap)
 
     avio_rb32(pb);                    // "RIFF"
     s->file_size = avio_rl32(pb) + 8;
-    avio_seek(pb, 8 + 4 + 1 + 1, SEEK_CUR);    // "QLCMfmt " + chunk-size + major-version + minor-version
+    avio_skip(pb, 8 + 4 + 1 + 1);    // "QLCMfmt " + chunk-size + major-version + minor-version
 
     st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
     st->codec->channels   = 1;
@@ -110,13 +110,13 @@ static int qcp_read_header(AVFormatContext *s, AVFormatParameters *ap)
         av_log(s, AV_LOG_ERROR, "Unknown codec GUID.\n");
         return AVERROR_INVALIDDATA;
     }
-    avio_seek(pb, 2 + 80, SEEK_CUR); // codec-version + codec-name
+    avio_skip(pb, 2 + 80); // codec-version + codec-name
     st->codec->bit_rate = avio_rl16(pb);
 
     s->packet_size = avio_rl16(pb);
-    avio_seek(pb, 2, SEEK_CUR); // block-size
+    avio_skip(pb, 2); // block-size
     st->codec->sample_rate = avio_rl16(pb);
-    avio_seek(pb, 2, SEEK_CUR); // sample-size
+    avio_skip(pb, 2); // sample-size
 
     memset(c->rates_per_mode, -1, sizeof(c->rates_per_mode));
     nb_rates = avio_rl32(pb);
@@ -129,7 +129,7 @@ static int qcp_read_header(AVFormatContext *s, AVFormatParameters *ap)
         } else
             c->rates_per_mode[mode] = size;
     }
-    avio_seek(pb, 16 - 2*nb_rates + 20, SEEK_CUR); // empty entries of rate-map-table + reserved
+    avio_skip(pb, 16 - 2*nb_rates + 20); // empty entries of rate-map-table + reserved
 
     return 0;
 }
@@ -174,14 +174,14 @@ static int qcp_read_packet(AVFormatContext *s, AVPacket *pkt)
         case MKTAG('v', 'r', 'a', 't'):
             if (avio_rl32(pb)) // var-rate-flag
                 s->packet_size = 0;
-            avio_seek(pb, 4, SEEK_CUR); // size-in-packets
+            avio_skip(pb, 4); // size-in-packets
             break;
         case MKTAG('d', 'a', 't', 'a'):
             c->data_size = chunk_size;
             break;
 
         default:
-            avio_seek(pb, chunk_size, SEEK_CUR);
+            avio_skip(pb, chunk_size);
         }
     }
     return AVERROR_EOF;
diff --git a/libavformat/r3d.c b/libavformat/r3d.c
index 39f97ff9aa..aad88ee9c7 100644
--- a/libavformat/r3d.c
+++ b/libavformat/r3d.c
@@ -72,7 +72,7 @@ static int r3d_read_red1(AVFormatContext *s)
     tmp = avio_rb32(s->pb); // filenum
     av_dlog(s, "filenum %d\n", tmp);
 
-    avio_seek(s->pb, 32, SEEK_CUR); // unknown
+    avio_skip(s->pb, 32); // unknown
 
     st->codec->width  = avio_rb32(s->pb);
     st->codec->height = avio_rb32(s->pb);
@@ -152,7 +152,7 @@ static void r3d_read_reos(AVFormatContext *s)
     tmp = avio_rb32(s->pb);
     av_dlog(s, "num audio chunks %d\n", tmp);
 
-    avio_seek(s->pb, 6*4, SEEK_CUR);
+    avio_skip(s->pb, 6*4);
 }
 
 static int r3d_read_header(AVFormatContext *s, AVFormatParameters *ap)
@@ -332,7 +332,7 @@ static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
             break;
         default:
         skip:
-            avio_seek(s->pb, atom.size-8, SEEK_CUR);
+            avio_skip(s->pb, atom.size-8);
         }
     }
     return err;
diff --git a/libavformat/rawenc.c b/libavformat/rawenc.c
index 20ddfd5609..a43d5f61b2 100644
--- a/libavformat/rawenc.c
+++ b/libavformat/rawenc.c
@@ -26,7 +26,7 @@
 int ff_raw_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
     avio_write(s->pb, pkt->data, pkt->size);
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     return 0;
 }
 
diff --git a/libavformat/rdt.c b/libavformat/rdt.c
index 36e61c02ed..d6a96de5c1 100644
--- a/libavformat/rdt.c
+++ b/libavformat/rdt.c
@@ -161,16 +161,16 @@ rdt_load_mdpr (PayloadContext *rdt, AVStream *st, int rule_nr)
         num = avio_rb16(&pb);
         if (rule_nr < 0 || rule_nr >= num)
             return -1;
-        avio_seek(&pb, rule_nr * 2, SEEK_CUR);
+        avio_skip(&pb, rule_nr * 2);
         chunk_nr = avio_rb16(&pb);
-        avio_seek(&pb, (num - 1 - rule_nr) * 2, SEEK_CUR);
+        avio_skip(&pb, (num - 1 - rule_nr) * 2);
 
         /* read MDPR chunks */
         num = avio_rb16(&pb);
         if (chunk_nr >= num)
             return -1;
         while (chunk_nr--)
-            avio_seek(&pb, avio_rb32(&pb), SEEK_CUR);
+            avio_skip(&pb, avio_rb32(&pb));
         size = avio_rb32(&pb);
     } else {
         size = rdt->mlti_data_size;
diff --git a/libavformat/riff.c b/libavformat/riff.c
index 920cd96e37..fb8ab1c075 100644
--- a/libavformat/riff.c
+++ b/libavformat/riff.c
@@ -502,7 +502,7 @@ void ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
             codec->bits_per_coded_sample = avio_rl16(pb);
             codec->channel_layout = avio_rl32(pb); /* dwChannelMask */
             id = avio_rl32(pb); /* 4 first bytes of GUID */
-            avio_seek(pb, 12, SEEK_CUR); /* skip end of GUID */
+            avio_skip(pb, 12); /* skip end of GUID */
             cbSize -= 22;
             size -= 22;
         }
@@ -515,7 +515,7 @@ void ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
 
         /* It is possible for the chunk to contain garbage at the end */
         if (size > 0)
-            avio_seek(pb, size, SEEK_CUR);
+            avio_skip(pb, size);
     }
     codec->codec_id = ff_wav_codec_get_id(id, codec->bits_per_coded_sample);
     if (codec->codec_id == CODEC_ID_AAC_LATM) {
diff --git a/libavformat/rl2.c b/libavformat/rl2.c
index 4538d5c5cd..93d4c34459 100644
--- a/libavformat/rl2.c
+++ b/libavformat/rl2.c
@@ -95,7 +95,7 @@ static av_cold int rl2_read_header(AVFormatContext *s,
     int i;
     int ret = 0;
 
-    avio_seek(pb,4, SEEK_CUR);          /* skip FORM tag */
+    avio_skip(pb,4);          /* skip FORM tag */
     back_size = avio_rl32(pb); /**< get size of the background frame */
     signature = avio_rb32(pb);
     data_size = avio_rb32(pb);
diff --git a/libavformat/rmdec.c b/libavformat/rmdec.c
index e2e9b0298c..1ffeae56ee 100644
--- a/libavformat/rmdec.c
+++ b/libavformat/rmdec.c
@@ -132,7 +132,7 @@ static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
     if (version == 3) {
         int header_size = avio_rb16(pb);
         int64_t startpos = avio_tell(pb);
-        avio_seek(pb, 14, SEEK_CUR);
+        avio_skip(pb, 14);
         rm_read_metadata(s, 0);
         if ((startpos + header_size) >= avio_tell(pb) + 2) {
             // fourcc (should always be "lpcJ")
@@ -141,7 +141,7 @@ static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
         }
         // Skip extra header crap (this should never happen)
         if ((startpos + header_size) > avio_tell(pb))
-            avio_seek(pb, header_size + startpos - avio_tell(pb), SEEK_CUR);
+            avio_skip(pb, header_size + startpos - avio_tell(pb));
         st->codec->sample_rate = 8000;
         st->codec->channels = 1;
         st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
@@ -150,7 +150,7 @@ static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
         int flavor, sub_packet_h, coded_framesize, sub_packet_size;
         int codecdata_length;
         /* old version (4) */
-        avio_seek(pb, 2, SEEK_CUR); /* unused */
+        avio_skip(pb, 2); /* unused */
         avio_rb32(pb); /* .ra4 */
         avio_rb32(pb); /* data size */
         avio_rb16(pb); /* version2 */
@@ -321,7 +321,7 @@ ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
 skip:
     /* skip codec info */
     size = avio_tell(pb) - codec_pos;
-    avio_seek(pb, codec_data_size - size, SEEK_CUR);
+    avio_skip(pb, codec_data_size - size);
 
     return 0;
 }
@@ -340,7 +340,7 @@ static int rm_read_index(AVFormatContext *s)
         size     = avio_rb32(pb);
         if (size < 20)
             return -1;
-        avio_seek(pb, 2, SEEK_CUR);
+        avio_skip(pb, 2);
         n_pkts   = avio_rb32(pb);
         str_id   = avio_rb16(pb);
         next_off = avio_rb32(pb);
@@ -353,10 +353,10 @@ static int rm_read_index(AVFormatContext *s)
             goto skip;
 
         for (n = 0; n < n_pkts; n++) {
-            avio_seek(pb, 2, SEEK_CUR);
+            avio_skip(pb, 2);
             pts = avio_rb32(pb);
             pos = avio_rb32(pb);
-            avio_seek(pb, 4, SEEK_CUR); /* packet no. */
+            avio_skip(pb, 4); /* packet no. */
 
             av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
         }
@@ -469,7 +469,7 @@ static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
             goto header_end;
         default:
             /* unknown tag: skip it */
-            avio_seek(pb, tag_size - 10, SEEK_CUR);
+            avio_skip(pb, tag_size - 10);
             break;
         }
     }
@@ -529,7 +529,7 @@ static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_
             if(state == MKBETAG('I', 'N', 'D', 'X')){
                 int n_pkts, expected_len;
                 len = avio_rb32(pb);
-                avio_seek(pb, 2, SEEK_CUR);
+                avio_skip(pb, 2);
                 n_pkts = avio_rb32(pb);
                 expected_len = 20 + n_pkts * 14;
                 if (len == 20)
@@ -566,7 +566,7 @@ static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_
         if (i == s->nb_streams) {
 skip:
             /* skip packet if unknown number */
-            avio_seek(pb, len, SEEK_CUR);
+            avio_skip(pb, len);
             rm->remaining_len = 0;
             continue;
         }
@@ -929,7 +929,7 @@ static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
                 break;
         }
 
-        avio_seek(s->pb, len, SEEK_CUR);
+        avio_skip(s->pb, len);
     }
     *ppos = pos;
     return dts;
diff --git a/libavformat/rmenc.c b/libavformat/rmenc.c
index 8a608861f5..4835cf4435 100644
--- a/libavformat/rmenc.c
+++ b/libavformat/rmenc.c
@@ -341,7 +341,7 @@ static int rm_write_header(AVFormatContext *s)
 
     if (rv10_write_header(s, 0, 0))
         return AVERROR_INVALIDDATA;
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     return 0;
 }
 
@@ -368,7 +368,7 @@ static int rm_write_audio(AVFormatContext *s, const uint8_t *buf, int size, int
     } else {
         avio_write(pb, buf, size);
     }
-    put_flush_packet(pb);
+    avio_flush(pb);
     stream->nb_frames++;
     av_free(buf1);
     return 0;
@@ -413,7 +413,7 @@ static int rm_write_video(AVFormatContext *s, const uint8_t *buf, int size, int
     avio_w8(pb, stream->nb_frames & 0xff);
 
     avio_write(pb, buf, size);
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     stream->nb_frames++;
     return 0;
@@ -454,7 +454,7 @@ static int rm_write_trailer(AVFormatContext *s)
         avio_wb32(pb, 0);
         avio_wb32(pb, 0);
     }
-    put_flush_packet(pb);
+    avio_flush(pb);
     return 0;
 }
 
diff --git a/libavformat/rsoenc.c b/libavformat/rsoenc.c
index fc7df76f76..58cfc798c9 100644
--- a/libavformat/rsoenc.c
+++ b/libavformat/rsoenc.c
@@ -60,7 +60,7 @@ static int rso_write_header(AVFormatContext *s)
     avio_wb16(pb, enc->sample_rate);
     avio_wb16(pb, 0x0000);           /* play mode ? (0x0000 = don't loop) */
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     return 0;
 }
@@ -95,7 +95,7 @@ static int rso_write_trailer(AVFormatContext *s)
     avio_wb16(pb, coded_file_size);
     avio_seek(pb, file_size, SEEK_SET);
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     return 0;
 }
diff --git a/libavformat/rtpdec.c b/libavformat/rtpdec.c
index b4b8ffcd72..438ceda810 100644
--- a/libavformat/rtpdec.c
+++ b/libavformat/rtpdec.c
@@ -320,7 +320,7 @@ int rtp_check_and_send_back_rr(RTPDemuxContext *s, int count)
         avio_w8(pb, 0);
     }
 
-    put_flush_packet(pb);
+    avio_flush(pb);
     len = url_close_dyn_buf(pb, &buf);
     if ((len > 0) && buf) {
         int result;
@@ -348,7 +348,7 @@ void rtp_send_punch_packets(URLContext* rtp_handle)
     avio_wb32(pb, 0); /* Timestamp */
     avio_wb32(pb, 0); /* SSRC */
 
-    put_flush_packet(pb);
+    avio_flush(pb);
     len = url_close_dyn_buf(pb, &buf);
     if ((len > 0) && buf)
         url_write(rtp_handle, buf, len);
@@ -363,7 +363,7 @@ void rtp_send_punch_packets(URLContext* rtp_handle)
     avio_wb16(pb, 1); /* length in words - 1 */
     avio_wb32(pb, 0); /* our own SSRC */
 
-    put_flush_packet(pb);
+    avio_flush(pb);
     len = url_close_dyn_buf(pb, &buf);
     if ((len > 0) && buf)
         url_write(rtp_handle, buf, len);
diff --git a/libavformat/rtpdec_asf.c b/libavformat/rtpdec_asf.c
index 8c4969111c..3c19ad6e5b 100644
--- a/libavformat/rtpdec_asf.c
+++ b/libavformat/rtpdec_asf.c
@@ -187,11 +187,11 @@ static int asfrtp_parse_packet(AVFormatContext *s, PayloadContext *asf,
                 flags |= RTP_FLAG_KEY;
             len_off = avio_rb24(pb);
             if (mflags & 0x20)   /**< relative timestamp */
-                avio_seek(pb, 4, SEEK_CUR);
+                avio_skip(pb, 4);
             if (mflags & 0x10)   /**< has duration */
-                avio_seek(pb, 4, SEEK_CUR);
+                avio_skip(pb, 4);
             if (mflags & 0x8)    /**< has location ID */
-                avio_seek(pb, 4, SEEK_CUR);
+                avio_skip(pb, 4);
             off = avio_tell(pb);
 
             if (!(mflags & 0x40)) {
@@ -214,7 +214,7 @@ static int asfrtp_parse_packet(AVFormatContext *s, PayloadContext *asf,
                     return AVERROR(EIO);
 
                 avio_write(asf->pktbuf, buf + off, len - off);
-                avio_seek(pb, len - off, SEEK_CUR);
+                avio_skip(pb, len - off);
                 if (!(flags & RTP_FLAG_MARKER))
                     return -1;
                 out_len     = url_close_dyn_buf(asf->pktbuf, &asf->buf);
@@ -234,7 +234,7 @@ static int asfrtp_parse_packet(AVFormatContext *s, PayloadContext *asf,
                 asf->buf = av_realloc(asf->buf, out_len);
                 memcpy(asf->buf + prev_len, buf + off,
                        FFMIN(cur_len, len - off));
-                avio_seek(pb, cur_len, SEEK_CUR);
+                avio_skip(pb, cur_len);
             }
         }
 
diff --git a/libavformat/rtpdec_qt.c b/libavformat/rtpdec_qt.c
index 4041a0fca5..206ed347b4 100644
--- a/libavformat/rtpdec_qt.c
+++ b/libavformat/rtpdec_qt.c
@@ -149,13 +149,13 @@ static int qt_rtp_parse_packet(AVFormatContext *s, PayloadContext *qt,
                 break;
             }
             default:
-                avio_seek(&pb, tlv_len, SEEK_CUR);
+                avio_skip(&pb, tlv_len);
                 break;
             }
         }
 
         /* 32-bit alignment */
-        avio_seek(&pb, ((avio_tell(&pb) + 3) & ~3) - avio_tell(&pb), SEEK_CUR);
+        avio_skip(&pb, ((avio_tell(&pb) + 3) & ~3) - avio_tell(&pb));
     } else
         avio_seek(&pb, 4, SEEK_SET);
 
diff --git a/libavformat/rtpenc.c b/libavformat/rtpenc.c
index 6c49d34c31..71ccdabf4a 100644
--- a/libavformat/rtpenc.c
+++ b/libavformat/rtpenc.c
@@ -206,7 +206,7 @@ static void rtcp_send_sr(AVFormatContext *s1, int64_t ntp_time)
     avio_wb32(s1->pb, rtp_ts);
     avio_wb32(s1->pb, s->packet_count);
     avio_wb32(s1->pb, s->octet_count);
-    put_flush_packet(s1->pb);
+    avio_flush(s1->pb);
 }
 
 /* send an rtp packet. sequence number is incremented, but the caller
@@ -225,7 +225,7 @@ void ff_rtp_send_data(AVFormatContext *s1, const uint8_t *buf1, int len, int m)
     avio_wb32(s1->pb, s->ssrc);
 
     avio_write(s1->pb, buf1, len);
-    put_flush_packet(s1->pb);
+    avio_flush(s1->pb);
 
     s->seq++;
     s->octet_count += len;
diff --git a/libavformat/sauce.c b/libavformat/sauce.c
index 8f1acb4a77..41e991e3e7 100644
--- a/libavformat/sauce.c
+++ b/libavformat/sauce.c
@@ -51,14 +51,14 @@ int ff_sauce_read(AVFormatContext *avctx, uint64_t *fsize, int *got_width, int g
     GET_SAUCE_META("artist",    20)
     GET_SAUCE_META("publisher", 20)
     GET_SAUCE_META("date",      8)
-    avio_seek(pb, 4, SEEK_CUR);
+    avio_skip(pb, 4);
     datatype    = avio_r8(pb);
     filetype    = avio_r8(pb);
     t1          = avio_rl16(pb);
     t2          = avio_rl16(pb);
     nb_comments = avio_r8(pb);
     flags       = avio_r8(pb);
-    avio_seek(pb, 4, SEEK_CUR);
+    avio_skip(pb, 4);
     GET_SAUCE_META("encoder",   22);
 
     if (got_width && datatype && filetype) {
diff --git a/libavformat/siff.c b/libavformat/siff.c
index 880132ff67..d0f682b0cf 100644
--- a/libavformat/siff.c
+++ b/libavformat/siff.c
@@ -103,7 +103,7 @@ static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
     }
     width = avio_rl16(pb);
     height = avio_rl16(pb);
-    avio_seek(pb, 4, SEEK_CUR);
+    avio_skip(pb, 4);
     c->frames = avio_rl16(pb);
     if(!c->frames){
         av_log(s, AV_LOG_ERROR, "File contains no frames ???\n");
@@ -113,7 +113,7 @@ static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
     c->rate = avio_rl16(pb);
     c->block_align = c->rate * (c->bits >> 3);
 
-    avio_seek(pb, 16, SEEK_CUR); //zeroes
+    avio_skip(pb, 16); //zeroes
 
     st = av_new_stream(s, 0);
     if (!st)
@@ -145,7 +145,7 @@ static int siff_parse_soun(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
         av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
         return -1;
     }
-    avio_seek(pb, 4, SEEK_CUR); //unknown value
+    avio_skip(pb, 4); //unknown value
     c->rate = avio_rl16(pb);
     c->bits = avio_rl16(pb);
     c->block_align = c->rate * (c->bits >> 3);
@@ -160,7 +160,7 @@ static int siff_read_header(AVFormatContext *s, AVFormatParameters *ap)
 
     if (avio_rl32(pb) != TAG_SIFF)
         return -1;
-    avio_seek(pb, 4, SEEK_CUR); //ignore size
+    avio_skip(pb, 4); //ignore size
     tag = avio_rl32(pb);
 
     if (tag != TAG_VBV1 && tag != TAG_SOUN){
@@ -176,7 +176,7 @@ static int siff_read_header(AVFormatContext *s, AVFormatParameters *ap)
         av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n");
         return -1;
     }
-    avio_seek(pb, 4, SEEK_CUR); //ignore size
+    avio_skip(pb, 4); //ignore size
 
     return 0;
 }
diff --git a/libavformat/soxdec.c b/libavformat/soxdec.c
index 6d99033f47..5e1e220f76 100644
--- a/libavformat/soxdec.c
+++ b/libavformat/soxdec.c
@@ -58,14 +58,14 @@ static int sox_read_header(AVFormatContext *s,
     if (avio_rl32(pb) == SOX_TAG) {
         st->codec->codec_id = CODEC_ID_PCM_S32LE;
         header_size         = avio_rl32(pb);
-        avio_seek(pb, 8, SEEK_CUR); /* sample count */
+        avio_skip(pb, 8); /* sample count */
         sample_rate         = av_int2dbl(avio_rl64(pb));
         st->codec->channels = avio_rl32(pb);
         comment_size        = avio_rl32(pb);
     } else {
         st->codec->codec_id = CODEC_ID_PCM_S32BE;
         header_size         = avio_rb32(pb);
-        avio_seek(pb, 8, SEEK_CUR); /* sample count */
+        avio_skip(pb, 8); /* sample count */
         sample_rate         = av_int2dbl(avio_rb64(pb));
         st->codec->channels = avio_rb32(pb);
         comment_size        = avio_rb32(pb);
@@ -105,7 +105,7 @@ static int sox_read_header(AVFormatContext *s,
                                AV_METADATA_DONT_STRDUP_VAL);
     }
 
-    avio_seek(pb, header_size - SOX_FIXED_HDR - comment_size, SEEK_CUR);
+    avio_skip(pb, header_size - SOX_FIXED_HDR - comment_size);
 
     st->codec->sample_rate           = sample_rate;
     st->codec->bits_per_coded_sample = 32;
diff --git a/libavformat/soxenc.c b/libavformat/soxenc.c
index fb68d0b908..214acdd59b 100644
--- a/libavformat/soxenc.c
+++ b/libavformat/soxenc.c
@@ -78,7 +78,7 @@ static int sox_write_header(AVFormatContext *s)
     for ( ; comment_size > comment_len; comment_len++)
         avio_w8(pb, 0);
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     return 0;
 }
@@ -107,7 +107,7 @@ static int sox_write_trailer(AVFormatContext *s)
             avio_wb64(pb, num_samples);
         avio_seek(pb, file_size, SEEK_SET);
 
-        put_flush_packet(pb);
+        avio_flush(pb);
     }
 
     return 0;
diff --git a/libavformat/spdifdec.c b/libavformat/spdifdec.c
index 8a6b79dd52..dd29a5fecc 100644
--- a/libavformat/spdifdec.c
+++ b/libavformat/spdifdec.c
@@ -201,7 +201,7 @@ static int spdif_read_packet(AVFormatContext *s, AVPacket *pkt)
     }
 
     /* skip over the padding to the beginning of the next frame */
-    avio_seek(pb, offset - pkt->size - BURST_HEADER_SIZE, SEEK_CUR);
+    avio_skip(pb, offset - pkt->size - BURST_HEADER_SIZE);
 
     if (!s->nb_streams) {
         /* first packet, create a stream */
diff --git a/libavformat/spdifenc.c b/libavformat/spdifenc.c
index b4111f62b7..f6d4ec160e 100644
--- a/libavformat/spdifenc.c
+++ b/libavformat/spdifenc.c
@@ -531,7 +531,7 @@ static int spdif_write_packet(struct AVFormatContext *s, AVPacket *pkt)
     av_log(s, AV_LOG_DEBUG, "type=%x len=%i pkt_offset=%i\n",
            ctx->data_type, ctx->out_bytes, ctx->pkt_offset);
 
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     return 0;
 }
 
diff --git a/libavformat/swfdec.c b/libavformat/swfdec.c
index c63052c66c..f90564f3db 100644
--- a/libavformat/swfdec.c
+++ b/libavformat/swfdec.c
@@ -70,7 +70,7 @@ static int swf_read_header(AVFormatContext *s, AVFormatParameters *ap)
     /* skip rectangle size */
     nbits = avio_r8(pb) >> 3;
     len = (4 * nbits - 3 + 7) / 8;
-    avio_seek(pb, len, SEEK_CUR);
+    avio_skip(pb, len);
     swf->frame_rate = avio_rl16(pb); /* 8.8 fixed */
     avio_rl16(pb); /* frame count */
 
@@ -159,7 +159,7 @@ static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
                 st = s->streams[i];
                 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->id == -1) {
             if (st->codec->codec_id == CODEC_ID_MP3) {
-                avio_seek(pb, 4, SEEK_CUR);
+                avio_skip(pb, 4);
                 av_get_packet(pb, pkt, len-4);
             } else { // ADPCM, PCM
                 av_get_packet(pb, pkt, len);
@@ -202,7 +202,7 @@ static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
             return pkt->size;
         }
     skip:
-        avio_seek(pb, len, SEEK_CUR);
+        avio_skip(pb, len);
     }
     return 0;
 }
diff --git a/libavformat/swfenc.c b/libavformat/swfenc.c
index 182cb65660..052d7205e8 100644
--- a/libavformat/swfenc.c
+++ b/libavformat/swfenc.c
@@ -326,7 +326,7 @@ static int swf_write_header(AVFormatContext *s)
         put_swf_end_tag(s);
     }
 
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
     return 0;
 }
 
@@ -432,7 +432,7 @@ static int swf_write_video(AVFormatContext *s,
     put_swf_tag(s, TAG_SHOWFRAME);
     put_swf_end_tag(s);
 
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
 
     return 0;
 }
@@ -489,7 +489,7 @@ static int swf_write_trailer(AVFormatContext *s)
     put_swf_tag(s, TAG_END);
     put_swf_end_tag(s);
 
-    put_flush_packet(s->pb);
+    avio_flush(s->pb);
 
     /* patch file size and number of frames if not streamed */
     if (!url_is_streamed(s->pb) && video_enc) {
diff --git a/libavformat/tmv.c b/libavformat/tmv.c
index c632988e18..0a16ae111a 100644
--- a/libavformat/tmv.c
+++ b/libavformat/tmv.c
@@ -152,7 +152,7 @@ static int tmv_read_packet(AVFormatContext *s, AVPacket *pkt)
     ret = av_get_packet(pb, pkt, pkt_size);
 
     if (tmv->stream_index)
-        avio_seek(pb, tmv->padding, SEEK_CUR);
+        avio_skip(pb, tmv->padding);
 
     pkt->stream_index  = tmv->stream_index;
     tmv->stream_index ^= 1;
diff --git a/libavformat/tta.c b/libavformat/tta.c
index 8669057fbd..d5f8e1ed61 100644
--- a/libavformat/tta.c
+++ b/libavformat/tta.c
@@ -50,7 +50,7 @@ static int tta_read_header(AVFormatContext *s, AVFormatParameters *ap)
     if (avio_rl32(s->pb) != AV_RL32("TTA1"))
         return -1; // not tta file
 
-    avio_seek(s->pb, 2, SEEK_CUR); // FIXME: flags
+    avio_skip(s->pb, 2); // FIXME: flags
     channels = avio_rl16(s->pb);
     bps = avio_rl16(s->pb);
     samplerate = avio_rl32(s->pb);
@@ -65,7 +65,7 @@ static int tta_read_header(AVFormatContext *s, AVFormatParameters *ap)
         return -1;
     }
 
-    avio_seek(s->pb, 4, SEEK_CUR); // header crc
+    avio_skip(s->pb, 4); // header crc
 
     framelen = samplerate*256/245;
     c->totalframes = datalen / framelen + ((datalen % framelen) ? 1 : 0);
@@ -91,7 +91,7 @@ static int tta_read_header(AVFormatContext *s, AVFormatParameters *ap)
         av_add_index_entry(st, framepos, i*framelen, size, 0, AVINDEX_KEYFRAME);
         framepos += size;
     }
-    avio_seek(s->pb, 4, SEEK_CUR); // seektable crc
+    avio_skip(s->pb, 4); // seektable crc
 
     st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
     st->codec->codec_id = CODEC_ID_TTA;
diff --git a/libavformat/txd.c b/libavformat/txd.c
index 22dcfdbe77..05eb0ce6f3 100644
--- a/libavformat/txd.c
+++ b/libavformat/txd.c
@@ -73,7 +73,7 @@ next_chunk:
             if (chunk_size > 100)
                 break;
         case TXD_EXTRA:
-            avio_seek(s->pb, chunk_size, SEEK_CUR);
+            avio_skip(s->pb, chunk_size);
         case TXD_FILE:
         case TXD_TEXTURE:
             goto next_chunk;
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 469737378a..89eb557647 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -54,13 +54,13 @@ unsigned avformat_version(void)
 
 const char *avformat_configuration(void)
 {
-    return FFMPEG_CONFIGURATION;
+    return LIBAV_CONFIGURATION;
 }
 
 const char *avformat_license(void)
 {
 #define LICENSE_PREFIX "libavformat license: "
-    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
+    return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
 }
 
 /* fraction handling */
@@ -624,7 +624,7 @@ int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
             goto fail;
         }
         if (buf_size > 0) {
-            url_setbufsize(pb, buf_size);
+            ffio_set_buf_size(pb, buf_size);
         }
         if (!fmt && (err = av_probe_input_buffer(pb, &fmt, filename, logctx, 0, logctx ? (*ic_ptr)->probesize : 0)) < 0) {
             goto fail;
@@ -3823,3 +3823,54 @@ int ff_find_stream_index(AVFormatContext *s, int id)
     }
     return -1;
 }
+
+void ff_make_absolute_url(char *buf, int size, const char *base,
+                          const char *rel)
+{
+    char *sep;
+    /* Absolute path, relative to the current server */
+    if (base && strstr(base, "://") && rel[0] == '/') {
+        if (base != buf)
+            av_strlcpy(buf, base, size);
+        sep = strstr(buf, "://");
+        if (sep) {
+            sep += 3;
+            sep = strchr(sep, '/');
+            if (sep)
+                *sep = '\0';
+        }
+        av_strlcat(buf, rel, size);
+        return;
+    }
+    /* If rel actually is an absolute url, just copy it */
+    if (!base || strstr(rel, "://") || rel[0] == '/') {
+        av_strlcpy(buf, rel, size);
+        return;
+    }
+    if (base != buf)
+        av_strlcpy(buf, base, size);
+    /* Remove the file name from the base url */
+    sep = strrchr(buf, '/');
+    if (sep)
+        sep[1] = '\0';
+    else
+        buf[0] = '\0';
+    while (av_strstart(rel, "../", NULL) && sep) {
+        /* Remove the path delimiter at the end */
+        sep[0] = '\0';
+        sep = strrchr(buf, '/');
+        /* If the next directory name to pop off is "..", break here */
+        if (!strcmp(sep ? &sep[1] : buf, "..")) {
+            /* Readd the slash we just removed */
+            av_strlcat(buf, "/", size);
+            break;
+        }
+        /* Cut off the directory name */
+        if (sep)
+            sep[1] = '\0';
+        else
+            buf[0] = '\0';
+        rel += 3;
+    }
+    av_strlcat(buf, rel, size);
+}
diff --git a/libavformat/vc1test.c b/libavformat/vc1test.c
index 2f84b52674..4ab9bca1af 100644
--- a/libavformat/vc1test.c
+++ b/libavformat/vc1test.c
@@ -68,7 +68,7 @@ static int vc1t_read_header(AVFormatContext *s,
     st->codec->width = avio_rl32(pb);
     if(avio_rl32(pb) != 0xC)
         return -1;
-    avio_seek(pb, 8, SEEK_CUR);
+    avio_skip(pb, 8);
     fps = avio_rl32(pb);
     if(fps == 0xFFFFFFFF)
         av_set_pts_info(st, 32, 1, 1000);
diff --git a/libavformat/vc1testenc.c b/libavformat/vc1testenc.c
index 65ac6029ac..89ee9ef78c 100644
--- a/libavformat/vc1testenc.c
+++ b/libavformat/vc1testenc.c
@@ -62,7 +62,7 @@ static int vc1test_write_packet(AVFormatContext *s, AVPacket *pkt)
     avio_wl32(pb, pkt->size | ((pkt->flags & AV_PKT_FLAG_KEY) ? 0x80000000 : 0));
     avio_wl32(pb, pkt->pts);
     avio_write(pb, pkt->data, pkt->size);
-    put_flush_packet(pb);
+    avio_flush(pb);
     ctx->frames++;
 
     return 0;
@@ -76,7 +76,7 @@ static int vc1test_write_trailer(AVFormatContext *s)
     if (!url_is_streamed(s->pb)) {
         avio_seek(pb, 0, SEEK_SET);
         avio_wl24(pb, ctx->frames);
-        put_flush_packet(pb);
+        avio_flush(pb);
     }
     return 0;
 }
diff --git a/libavformat/vocdec.c b/libavformat/vocdec.c
index f4fb8cc37b..d11e68c49f 100644
--- a/libavformat/vocdec.c
+++ b/libavformat/vocdec.c
@@ -45,13 +45,13 @@ static int voc_read_header(AVFormatContext *s, AVFormatParameters *ap)
     int header_size;
     AVStream *st;
 
-    avio_seek(pb, 20, SEEK_CUR);
+    avio_skip(pb, 20);
     header_size = avio_rl16(pb) - 22;
     if (header_size != 4) {
         av_log(s, AV_LOG_ERROR, "unknown header size: %d\n", header_size);
         return AVERROR(ENOSYS);
     }
-    avio_seek(pb, header_size, SEEK_CUR);
+    avio_skip(pb, header_size);
     st = av_new_stream(s, 0);
     if (!st)
         return AVERROR(ENOMEM);
@@ -114,13 +114,13 @@ voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
             dec->bits_per_coded_sample = avio_r8(pb);
             dec->channels = avio_r8(pb);
             tmp_codec = avio_rl16(pb);
-            avio_seek(pb, 4, SEEK_CUR);
+            avio_skip(pb, 4);
             voc->remaining_size -= 12;
             max_size -= 12;
             break;
 
         default:
-            avio_seek(pb, voc->remaining_size, SEEK_CUR);
+            avio_skip(pb, voc->remaining_size);
             max_size -= voc->remaining_size;
             voc->remaining_size = 0;
             break;
diff --git a/libavformat/vqf.c b/libavformat/vqf.c
index 49ed8b4e95..94ba543ba5 100644
--- a/libavformat/vqf.c
+++ b/libavformat/vqf.c
@@ -72,7 +72,7 @@ static int vqf_read_header(AVFormatContext *s, AVFormatParameters *ap)
     if (!st)
         return AVERROR(ENOMEM);
 
-    avio_seek(s->pb, 12, SEEK_CUR);
+    avio_skip(s->pb, 12);
 
     header_size = avio_rb32(s->pb);
 
@@ -101,7 +101,7 @@ static int vqf_read_header(AVFormatContext *s, AVFormatParameters *ap)
             st->codec->channels = avio_rb32(s->pb) + 1;
             read_bitrate        = avio_rb32(s->pb);
             rate_flag           = avio_rb32(s->pb);
-            avio_seek(s->pb, len-12, SEEK_CUR);
+            avio_skip(s->pb, len-12);
 
             st->codec->bit_rate              = read_bitrate*1000;
             st->codec->bits_per_coded_sample = 16;
@@ -140,7 +140,7 @@ static int vqf_read_header(AVFormatContext *s, AVFormatParameters *ap)
             av_log(s, AV_LOG_ERROR, "Unknown chunk: %c%c%c%c\n",
                    ((char*)&chunk_tag)[0], ((char*)&chunk_tag)[1],
                    ((char*)&chunk_tag)[2], ((char*)&chunk_tag)[3]);
-            avio_seek(s->pb, FFMIN(len, header_size), SEEK_CUR);
+            avio_skip(s->pb, FFMIN(len, header_size));
             break;
         }
 
diff --git a/libavformat/wav.c b/libavformat/wav.c
index 8023a791f3..876defb51d 100644
--- a/libavformat/wav.c
+++ b/libavformat/wav.c
@@ -71,7 +71,7 @@ static int wav_write_header(AVFormatContext *s)
     /* data header */
     wav->data = ff_start_tag(pb, "data");
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     return 0;
 }
@@ -96,7 +96,7 @@ static int wav_write_trailer(AVFormatContext *s)
     WAVContext    *wav = s->priv_data;
     int64_t file_size;
 
-    put_flush_packet(pb);
+    avio_flush(pb);
 
     if (!url_is_streamed(s->pb)) {
         ff_end_tag(pb, wav->data);
@@ -107,7 +107,7 @@ static int wav_write_trailer(AVFormatContext *s)
         avio_wl32(pb, (uint32_t)(file_size - 8));
         avio_seek(pb, file_size, SEEK_SET);
 
-        put_flush_packet(pb);
+        avio_flush(pb);
 
         if(s->streams[0]->codec->codec_tag != 0x01) {
             /* Update num_samps in fact chunk */
@@ -118,7 +118,7 @@ static int wav_write_trailer(AVFormatContext *s)
             avio_seek(pb, wav->data-12, SEEK_SET);
             avio_wl32(pb, number_of_samples);
             avio_seek(pb, file_size, SEEK_SET);
-            put_flush_packet(pb);
+            avio_flush(pb);
         }
     }
     return 0;
@@ -160,7 +160,7 @@ static int64_t find_tag(AVIOContext *pb, uint32_t tag1)
         size = next_tag(pb, &tag);
         if (tag == tag1)
             break;
-        avio_seek(pb, size, SEEK_CUR);
+        avio_skip(pb, size);
     }
     return size;
 }
@@ -217,7 +217,7 @@ static int wav_read_header(AVFormatContext *s,
         avio_rl64(pb); /* RIFF size */
         data_size = avio_rl64(pb);
         sample_count = avio_rl64(pb);
-        avio_seek(pb, size - 16, SEEK_CUR); /* skip rest of ds64 chunk */
+        avio_skip(pb, size - 16); /* skip rest of ds64 chunk */
     }
 
     /* parse fmt header */
@@ -243,7 +243,7 @@ static int wav_read_header(AVFormatContext *s,
             sample_count = avio_rl32(pb);
             size -= 4;
         }
-        avio_seek(pb, size, SEEK_CUR);
+        avio_skip(pb, size);
     }
     if (rf64)
         size = data_size;
@@ -276,7 +276,7 @@ static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16])
             return -1;
         if (!memcmp(guid, guid1, 16))
             return size;
-        avio_seek(pb, FFALIGN(size, INT64_C(8)) - 24, SEEK_CUR);
+        avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
     }
     return -1;
 }
@@ -410,7 +410,7 @@ static int w64_read_header(AVFormatContext *s, AVFormatParameters *ap)
 
     /* subtract chunk header size - normal wav file doesn't count it */
     ff_get_wav_header(pb, st->codec, size - 24);
-    avio_seek(pb, FFALIGN(size, INT64_C(8)) - size, SEEK_CUR);
+    avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
 
     st->need_parsing = AVSTREAM_PARSE_FULL;
 
diff --git a/libavformat/wc3movie.c b/libavformat/wc3movie.c
index a4dd26b442..0f2e077859 100644
--- a/libavformat/wc3movie.c
+++ b/libavformat/wc3movie.c
@@ -101,7 +101,7 @@ static int wc3_read_header(AVFormatContext *s,
     wc3->vpkt.data = NULL; wc3->vpkt.size = 0;
 
     /* skip the first 3 32-bit numbers */
-    avio_seek(pb, 12, SEEK_CUR);
+    avio_skip(pb, 12);
 
     /* traverse through the chunks and load the header information before
      * the first BRCH tag */
@@ -114,12 +114,12 @@ static int wc3_read_header(AVFormatContext *s,
         case SOND_TAG:
         case INDX_TAG:
             /* SOND unknown, INDX unnecessary; ignore both */
-            avio_seek(pb, size, SEEK_CUR);
+            avio_skip(pb, size);
             break;
 
         case PC__TAG:
             /* number of palettes, unneeded */
-            avio_seek(pb, 12, SEEK_CUR);
+            avio_skip(pb, 12);
             break;
 
         case BNAM_TAG:
@@ -240,7 +240,7 @@ static int wc3_read_packet(AVFormatContext *s,
         case TEXT_TAG:
             /* subtitle chunk */
 #if 0
-            avio_seek(pb, size, SEEK_CUR);
+            avio_skip(pb, size);
 #else
             if ((unsigned)size > sizeof(text) || (ret = avio_read(pb, text, size)) != size)
                 ret = AVERROR(EIO);
diff --git a/libavformat/westwood.c b/libavformat/westwood.c
index adb35319e2..818fe2d8d3 100644
--- a/libavformat/westwood.c
+++ b/libavformat/westwood.c
@@ -303,7 +303,7 @@ static int wsvqa_read_header(AVFormatContext *s,
             break;
         }
 
-        avio_seek(pb, chunk_size, SEEK_CUR);
+        avio_skip(pb, chunk_size);
     } while (chunk_tag != FINF_TAG);
 
     return 0;
@@ -348,7 +348,7 @@ static int wsvqa_read_packet(AVFormatContext *s,
             }
             /* stay on 16-bit alignment */
             if (skip_byte)
-                avio_seek(pb, 1, SEEK_CUR);
+                avio_skip(pb, 1);
 
             return ret;
         } else {
@@ -359,7 +359,7 @@ static int wsvqa_read_packet(AVFormatContext *s,
             default:
                 av_log(s, AV_LOG_INFO, "Skipping unknown chunk 0x%08X\n", chunk_type);
             }
-            avio_seek(pb, chunk_size + skip_byte, SEEK_CUR);
+            avio_skip(pb, chunk_size + skip_byte);
         }
     }
 
diff --git a/libavformat/wtv.c b/libavformat/wtv.c
index 0a362dd9da..35d987c061 100644
--- a/libavformat/wtv.c
+++ b/libavformat/wtv.c
@@ -539,7 +539,7 @@ static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int ty
     } else {
         av_freep(&buf);
         av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
-        avio_seek(pb, length, SEEK_CUR);
+        avio_skip(pb, length);
         return;
     }
 
@@ -582,7 +582,7 @@ static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
     WtvContext *wtv = s->priv_data;
     AVIOContext *pb = wtv->pb;
 
-    avio_seek(pb, 72, SEEK_CUR);  // picture aspect ratio is unreliable
+    avio_skip(pb, 72);  // picture aspect ratio is unreliable
     ff_get_bmp_header(pb, st);
 
     return 72 + 40;
@@ -658,17 +658,17 @@ static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
 
         if (size < 32) {
             av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
-            avio_seek(pb, size, SEEK_CUR);
+            avio_skip(pb, size);
             return NULL;
         }
 
-        avio_seek(pb, size - 32, SEEK_CUR);
+        avio_skip(pb, size - 32);
         ff_get_guid(pb, &actual_subtype);
         ff_get_guid(pb, &actual_formattype);
         avio_seek(pb, -size, SEEK_CUR);
 
         st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
-        avio_seek(pb, 32, SEEK_CUR);
+        avio_skip(pb, 32);
         return st;
     } else if (!ff_guidcmp(mediatype, mediatype_audio)) {
         st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
@@ -679,7 +679,7 @@ static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
         } else {
             if (ff_guidcmp(formattype, format_none))
                 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
-            avio_seek(pb, size, SEEK_CUR);
+            avio_skip(pb, size);
         }
 
         if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) {
@@ -708,7 +708,7 @@ static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
         } else {
             if (ff_guidcmp(formattype, format_none))
                 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
-            avio_seek(pb, size, SEEK_CUR);
+            avio_skip(pb, size);
         }
 
         if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) {
@@ -726,7 +726,7 @@ static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
             return NULL;
         if (ff_guidcmp(formattype, format_none))
             av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
-        avio_seek(pb, size, SEEK_CUR);
+        avio_skip(pb, size);
         st->codec->codec_id = CODEC_ID_DVB_SUBTITLE;
         return st;
     } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
@@ -736,21 +736,21 @@ static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
             return NULL;
         if (ff_guidcmp(formattype, format_none))
             av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
-        avio_seek(pb, size, SEEK_CUR);
+        avio_skip(pb, size);
         st->codec->codec_id   = CODEC_ID_DVB_TELETEXT;
         return st;
     } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
                !ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) {
         if (ff_guidcmp(formattype, format_none))
             av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
-        avio_seek(pb, size, SEEK_CUR);
+        avio_skip(pb, size);
         return NULL;
     }
 
     av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"PRI_GUID
                               ", subtype:"PRI_GUID", formattype:"PRI_GUID"\n",
                               ARG_GUID(mediatype), ARG_GUID(subtype), ARG_GUID(formattype));
-    avio_seek(pb, size, SEEK_CUR);
+    avio_skip(pb, size);
     return NULL;
 }
 
@@ -779,17 +779,17 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p
         if (len < 32)
             break;
         sid = avio_rl32(pb) & 0x7FFF;
-        avio_seek(pb, 8, SEEK_CUR);
+        avio_skip(pb, 8);
         consumed = 32;
 
         if (!ff_guidcmp(g, stream_guid)) {
             if (ff_find_stream_index(s, sid) < 0) {
                 ff_asf_guid mediatype, subtype, formattype;
                 int size;
-                avio_seek(pb, 28, SEEK_CUR);
+                avio_skip(pb, 28);
                 ff_get_guid(pb, &mediatype);
                 ff_get_guid(pb, &subtype);
-                avio_seek(pb, 12, SEEK_CUR);
+                avio_skip(pb, 12);
                 ff_get_guid(pb, &formattype);
                 size = avio_rl32(pb);
                 parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
@@ -800,10 +800,10 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p
             if (stream_index >= 0 && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
                 ff_asf_guid mediatype, subtype, formattype;
                 int size;
-                avio_seek(pb, 12, SEEK_CUR);
+                avio_skip(pb, 12);
                 ff_get_guid(pb, &mediatype);
                 ff_get_guid(pb, &subtype);
-                avio_seek(pb, 12, SEEK_CUR);
+                avio_skip(pb, 12);
                 ff_get_guid(pb, &formattype);
                 size = avio_rl32(pb);
                 parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
@@ -822,11 +822,11 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p
                 const uint8_t *pbuf = buf;
                 int buf_size;
 
-                avio_seek(pb, 8, SEEK_CUR);
+                avio_skip(pb, 8);
                 consumed += 8;
                 if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
                     !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) {
-                    avio_seek(pb, 6, SEEK_CUR);
+                    avio_skip(pb, 6);
                     consumed += 6;
                 }
 
@@ -840,7 +840,7 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p
             if (stream_index >= 0) {
                 AVStream *st = s->streams[stream_index];
                 int audio_type;
-                avio_seek(pb, 8, SEEK_CUR);
+                avio_skip(pb, 8);
                 audio_type = avio_r8(pb);
                 if (audio_type == 2)
                     st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
@@ -851,7 +851,7 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p
         } else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) {
             int stream_index = ff_find_stream_index(s, sid);
             if (stream_index >= 0) {
-                avio_seek(pb, 12, SEEK_CUR);
+                avio_skip(pb, 12);
                 if (avio_rl32(pb))
                     av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
                 consumed += 16;
@@ -861,7 +861,7 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p
             if (stream_index >= 0) {
                 AVStream *st = s->streams[stream_index];
                 uint8_t language[4];
-                avio_seek(pb, 12, SEEK_CUR);
+                avio_skip(pb, 12);
                 avio_read(pb, language, 3);
                 if (language[0]) {
                     language[3] = 0;
@@ -874,7 +874,7 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p
         } else if (!ff_guidcmp(g, timestamp_guid)) {
             int stream_index = ff_find_stream_index(s, sid);
             if (stream_index >= 0) {
-                avio_seek(pb, 8, SEEK_CUR);
+                avio_skip(pb, 8);
                 wtv->pts = avio_rl64(pb);
                 consumed += 16;
                 if (wtv->pts == -1)
@@ -885,7 +885,7 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p
                         wtv->epoch = wtv->pts;
                 if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
 #define WTV_PAD8(x) (((x) + 7) & ~7)
-                    avio_seek(pb, WTV_PAD8(len) - consumed, SEEK_CUR);
+                    avio_skip(pb, WTV_PAD8(len) - consumed);
                     return 0;
                 }
                 }
@@ -923,7 +923,7 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p
         } else
             av_log(s, AV_LOG_WARNING, "unsupported chunk:"PRI_GUID"\n", ARG_GUID(g));
 
-        avio_seek(pb, WTV_PAD8(len) - consumed, SEEK_CUR);
+        avio_skip(pb, WTV_PAD8(len) - consumed);
     }
     return AVERROR_EOF;
 }
@@ -954,13 +954,13 @@ static int read_header(AVFormatContext *s, AVFormatParameters *ap)
     wtv->last_valid_pts = AV_NOPTS_VALUE;
 
     /* read root directory sector */
-    avio_seek(s->pb, 0x30, SEEK_CUR);
+    avio_skip(s->pb, 0x30);
     root_size = avio_rl32(s->pb);
     if (root_size > sizeof(root)) {
         av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
         return AVERROR_INVALIDDATA;
     }
-    avio_seek(s->pb, 4, SEEK_CUR);
+    avio_skip(s->pb, 4);
     root_sector = avio_rl32(s->pb);
 
     avio_seek(s->pb, root_sector << WTV_SECTOR_BITS, SEEK_SET);
@@ -1047,7 +1047,7 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt)
         return ret;
     pkt->stream_index = stream_index;
     pkt->pts          = wtv->pts;
-    avio_seek(pb, WTV_PAD8(len) - len, SEEK_CUR);
+    avio_skip(pb, WTV_PAD8(len) - len);
     return 0;
 }
 
diff --git a/libavformat/wv.c b/libavformat/wv.c
index 1b6061ce43..600de9317b 100644
--- a/libavformat/wv.c
+++ b/libavformat/wv.c
@@ -153,7 +153,7 @@ static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb, int appen
                     chmask = avio_rl32(pb);
                     break;
                 case 5:
-                    avio_seek(pb, 1, SEEK_CUR);
+                    avio_skip(pb, 1);
                     chan |= (avio_r8(pb) & 0xF) << 8;
                     chmask = avio_rl24(pb);
                     break;
@@ -166,10 +166,10 @@ static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb, int appen
                 rate = avio_rl24(pb);
                 break;
             default:
-                avio_seek(pb, size, SEEK_CUR);
+                avio_skip(pb, size);
             }
             if(id&0x40)
-                avio_seek(pb, 1, SEEK_CUR);
+                avio_skip(pb, 1);
         }
         if(rate == -1){
             av_log(ctx, AV_LOG_ERROR, "Cannot determine custom sampling rate\n");
diff --git a/libavformat/xa.c b/libavformat/xa.c
index 17cf237a9d..3b6a77f4af 100644
--- a/libavformat/xa.c
+++ b/libavformat/xa.c
@@ -76,9 +76,9 @@ static int xa_read_header(AVFormatContext *s,
 
     st->codec->codec_type   = AVMEDIA_TYPE_AUDIO;
     st->codec->codec_id     = CODEC_ID_ADPCM_EA_MAXIS_XA;
-    avio_seek(pb, 4, SEEK_CUR);       /* Skip the XA ID */
+    avio_skip(pb, 4);       /* Skip the XA ID */
     xa->out_size            =  avio_rl32(pb);
-    avio_seek(pb, 2, SEEK_CUR);       /* Skip the tag */
+    avio_skip(pb, 2);       /* Skip the tag */
     st->codec->channels     = avio_rl16(pb);
     st->codec->sample_rate  = avio_rl32(pb);
     /* Value in file is average byte rate*/
diff --git a/libavformat/yop.c b/libavformat/yop.c
index 20de06ca85..486fdc5616 100644
--- a/libavformat/yop.c
+++ b/libavformat/yop.c
@@ -81,7 +81,7 @@ static int yop_read_header(AVFormatContext *s, AVFormatParameters *ap)
     video_dec->codec_type   = AVMEDIA_TYPE_VIDEO;
     video_dec->codec_id     = CODEC_ID_YOP;
 
-    avio_seek(pb, 6, SEEK_CUR);
+    avio_skip(pb, 6);
 
     frame_rate              = avio_r8(pb);
     yop->frame_size         = avio_r8(pb) * 2048;
@@ -153,7 +153,7 @@ static int yop_read_packet(AVFormatContext *s, AVPacket *pkt)
     // Set position to the start of the frame
     pkt->pos = yop->video_packet.pos;
 
-    avio_seek(pb, yop->audio_block_length - ret, SEEK_CUR);
+    avio_skip(pb, yop->audio_block_length - ret);
 
     ret = avio_read(pb, yop->video_packet.data + yop->palette_size,
                      actual_video_data_size);
diff --git a/libavformat/yuv4mpeg.c b/libavformat/yuv4mpeg.c
index 01366b08b6..a852568a64 100644
--- a/libavformat/yuv4mpeg.c
+++ b/libavformat/yuv4mpeg.c
@@ -143,7 +143,7 @@ static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
             ptr2 += picture->linesize[2];
     }
     }
-    put_flush_packet(pb);
+    avio_flush(pb);
     return 0;
 }
 
diff --git a/libavutil/utils.c b/libavutil/utils.c
index 8a1d32e167..52152f5af3 100644
--- a/libavutil/utils.c
+++ b/libavutil/utils.c
@@ -31,11 +31,11 @@ unsigned avutil_version(void)
 
 const char *avutil_configuration(void)
 {
-    return FFMPEG_CONFIGURATION;
+    return LIBAV_CONFIGURATION;
 }
 
 const char *avutil_license(void)
 {
 #define LICENSE_PREFIX "libavutil license: "
-    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
+    return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
 }
diff --git a/libpostproc/postprocess.c b/libpostproc/postprocess.c
index 92c822b772..6834dd723d 100644
--- a/libpostproc/postprocess.c
+++ b/libpostproc/postprocess.c
@@ -94,13 +94,13 @@ unsigned postproc_version(void)
 
 const char *postproc_configuration(void)
 {
-    return FFMPEG_CONFIGURATION;
+    return LIBAV_CONFIGURATION;
 }
 
 const char *postproc_license(void)
 {
 #define LICENSE_PREFIX "libpostproc license: "
-    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
+    return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
 }
 
 #if HAVE_ALTIVEC_H
diff --git a/libswscale/utils.c b/libswscale/utils.c
index 166e983477..1570297258 100644
--- a/libswscale/utils.c
+++ b/libswscale/utils.c
@@ -53,13 +53,13 @@ unsigned swscale_version(void)
 
 const char *swscale_configuration(void)
 {
-    return FFMPEG_CONFIGURATION;
+    return LIBAV_CONFIGURATION;
 }
 
 const char *swscale_license(void)
 {
 #define LICENSE_PREFIX "libswscale license: "
-    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
+    return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
 }
 
 #define RET 0xC3 //near return opcode for x86
diff --git a/version.sh b/version.sh
index be63945014..be67dc14ef 100755
--- a/version.sh
+++ b/version.sh
@@ -23,7 +23,7 @@ if [ -z "$2" ]; then
     exit
 fi
 
-NEW_REVISION="#define FFMPEG_VERSION \"$version\""
+NEW_REVISION="#define LIBAV_VERSION \"$version\""
 OLD_REVISION=$(cat version.h 2> /dev/null)
 
 # Update version.h only on revision changes to avoid spurious rebuilds
author	Michael Niedermayer	2011-03-17 16:53:58 +0100
committer	Michael Niedermayer	2011-03-17 17:22:52 +0100
commit	0fecf2642b9d909820683647c70031a954f5e58d (patch)
tree	36ca02de9fa27a049829fb589517223d2d0ce5f5
parent	e309fdc7018a1027d187ec27fb1d69a41a4ee167 (diff)
parent	f1f60f5252b0b448adcce0c1c52f3161ee69b9bf (diff)