diff options
author | Stefano Sabatini | 2010-06-01 14:00:44 +0000 |
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committer | Stefano Sabatini | 2010-06-01 14:00:44 +0000 |
commit | 9f41ed5a7ef89d4d0afafa00da7515aa7869d468 (patch) | |
tree | 184cd344d656e2b8eecb97969c6c4dbe891cd249 /doc/ffmpeg-doc.texi | |
parent | acbdbf815ae8c84a4b4c7687a9af63cf04e12492 (diff) |
Fix texi2pod.pl rendering of the Tips section by putting each @item
command on its own line, and create a corresponding "TIPS" man page
section.
Note that such section is not displayed, as currently only sections
with pre-defined names are rendered.
Originally committed as revision 23409 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'doc/ffmpeg-doc.texi')
-rw-r--r-- | doc/ffmpeg-doc.texi | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/doc/ffmpeg-doc.texi b/doc/ffmpeg-doc.texi index 6b2193eb3a..6f2038d512 100644 --- a/doc/ffmpeg-doc.texi +++ b/doc/ffmpeg-doc.texi @@ -917,9 +917,11 @@ FFserver (see the FFserver documentation). When FFmpeg will be a video player it will also be used for streaming :-) @chapter Tips +@c man begin TIPS @itemize -@item For streaming at very low bitrate application, use a low frame rate +@item +For streaming at very low bitrate application, use a low frame rate and a small GOP size. This is especially true for RealVideo where the Linux player does not seem to be very fast, so it can miss frames. An example is: @@ -928,30 +930,36 @@ frames. An example is: ffmpeg -g 3 -r 3 -t 10 -b 50k -s qcif -f rv10 /tmp/b.rm @end example -@item The parameter 'q' which is displayed while encoding is the current +@item +The parameter 'q' which is displayed while encoding is the current quantizer. The value 1 indicates that a very good quality could be achieved. The value 31 indicates the worst quality. If q=31 appears too often, it means that the encoder cannot compress enough to meet your bitrate. You must either increase the bitrate, decrease the frame rate or decrease the frame size. -@item If your computer is not fast enough, you can speed up the +@item +If your computer is not fast enough, you can speed up the compression at the expense of the compression ratio. You can use '-me zero' to speed up motion estimation, and '-intra' to disable motion estimation completely (you have only I-frames, which means it is about as good as JPEG compression). -@item To have very low audio bitrates, reduce the sampling frequency +@item +To have very low audio bitrates, reduce the sampling frequency (down to 22050 Hz for MPEG audio, 22050 or 11025 for AC-3). -@item To have a constant quality (but a variable bitrate), use the option +@item +To have a constant quality (but a variable bitrate), use the option '-qscale n' when 'n' is between 1 (excellent quality) and 31 (worst quality). -@item When converting video files, you can use the '-sameq' option which +@item +When converting video files, you can use the '-sameq' option which uses the same quality factor in the encoder as in the decoder. It allows almost lossless encoding. @end itemize +@c man end TIPS @bye |