[FFmpeg-devel] [PATCHv2] doc/demuxers: document gif demuxer

Lou Logan lou at lrcd.com
Mon Sep 1 00:16:42 CEST 2014

From ecad89e3edb64da662ae06a9d37c1fa84b02fadb Mon Sep 17 00:00:00 2001
From: Lou Logan <lou at lrcd.com>
Date: Thu, 28 Aug 2014 16:26:11 -0800
Subject: [PATCH] doc/demuxers: document gif demuxer

Signed-off-by: Lou Logan <lou at lrcd.com>
New patch addressing comments from Timothy and Clément.

 doc/demuxers.texi | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/doc/demuxers.texi b/doc/demuxers.texi
index d51b9d0..2c9d142 100644
--- a/doc/demuxers.texi
+++ b/doc/demuxers.texi
@@ -174,6 +174,46 @@ See @url{http://quvi.sourceforge.net/} for more information.
 FFmpeg needs to be built with @code{--enable-libquvi} for this demuxer to be
+ at section gif
+Animated GIF demuxer.
+It accepts the following options:
+ at table @option
+ at item min_delay
+Set the minimum valid delay between frames in hundredths of seconds.
+Range is 0 to 6000. Default value is 2.
+ at item default_delay
+Set the default delay between frames in hundredths of seconds.
+Range is 0 to 6000. Default value is 10.
+ at item ignore_loop
+GIF files can be set to loop infinitely or up to a certain number of
+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
+the GIF dictates.
+This option prevents a GIF stream from looping forever.
+Default value is 1.
+ at end table
+For example, with the overlay filter, place an infinitely looping GIF
+over another video:
+ at example
+ffmpeg -i input.mp4 -ignore_loop 0 -i input.gif -filter_complex overlay=shortest=1 out.mkv
+ at 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 loops infinitely.
 @section image2
 Image file demuxer.

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