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| author | Nicolas George <nicola.george@normalesup.org> | 2010-10-18 21:47:15 +0000 |
|---|---|---|
| committer | Stefano Sabatini <stefano.sabatini-lala@poste.it> | 2010-10-18 21:47:15 +0000 |
| commit | 4ad08021e8e81057d89c75fd63b97cd1f0757a23 (patch) | |
| tree | 9ac4c2b056547e55a1e0f183bc3137d3e215098c /doc | |
| parent | 43945b2766befcb4b2a5eb9b57fd9c25d9f4c849 (diff) | |
| download | ffmpeg-4ad08021e8e81057d89c75fd63b97cd1f0757a23.tar.gz | |
Add a -force_key_frames option to ffmpeg.
The option is useful to ensure that there is a seek point exactly at a
place the user will probably want to jump precisely sometime, the
major example would be the end of an opening and the beginning of a
chapter. The scene change detection system will often make it happen,
but not always for example if there is a fade-in.
See the thread:
Subject: [FFmpeg-devel] [PATCH] -force_key_frames option
Date: Tue, 12 Oct 2010 15:16:26 +0200
Patch by Nicolas George -mail nicolas,george,normalesup,org.
Originally committed as revision 25526 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/ffmpeg-doc.texi | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/doc/ffmpeg-doc.texi b/doc/ffmpeg-doc.texi index 875edde03c..21a9a662dd 100644 --- a/doc/ffmpeg-doc.texi +++ b/doc/ffmpeg-doc.texi @@ -495,6 +495,12 @@ Bitstream filters available are "dump_extra", "remove_extra", "noise", "h264_mp4 @example ffmpeg -i h264.mp4 -vcodec copy -vbsf h264_mp4toannexb -an out.h264 @end example +@item -force_key_frames @var{time}[,@var{time}...] +Force key frames at the specified timestamps, more precisely at the first +frames after each specified time. +This option can be useful to ensure that a seek point is present at a +chapter mark or any other designated place in the output file. +The timestamps must be specified in ascending order. @end table @section Audio Options |