From efaa4a8dbf7f4aaf27fabe38037dad6283ac1ed1 Mon Sep 17 00:00:00 2001 From: Lou Logan Date: Thu, 28 Aug 2014 16:26:11 -0800 Subject: doc/demuxers: document gif demuxer Signed-off-by: Lou Logan --- doc/demuxers.texi | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 'doc/demuxers.texi') diff --git a/doc/demuxers.texi b/doc/demuxers.texi index d51b9d0748..e5823227af 100644 --- a/doc/demuxers.texi +++ b/doc/demuxers.texi @@ -174,6 +174,40 @@ See @url{http://quvi.sourceforge.net/} for more information. FFmpeg needs to be built with @code{--enable-libquvi} for this demuxer to be enabled. +@section gif + +Animated GIF demuxer. + +It accepts the following options: + +@table @option +@item min_delay +Set the minimum valid delay between frames in hundredths of seconds. +Range is 0 to 6000. Default value is 2. + +@item default_delay +Set the default delay between frames in hundredths of seconds. +Range is 0 to 6000. Default value is 10. + +@item ignore_loop +GIF files can contain information to loop a certain number of times (or +infinitely). If @option{ignore_loop} is set to 1, then the loop setting +from the input will be ignored and looping will not occur. If set to 0, +then looping will occur and will cycle the number of times according to +the GIF. Default value is 1. +@end table + +For example, with the overlay filter, place an infinitely looping GIF +over another video: +@example +ffmpeg -i input.mp4 -ignore_loop 0 -i input.gif -filter_complex overlay=shortest=1 out.mkv +@end example + +Note that in the above example the shortest option for overlay filter is +used to end the output video at the length of the shortest input file, +which in this case is @file{input.mp4} as the GIF in this example loops +infinitely. + @section image2 Image file demuxer. -- cgit v1.2.3