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Better documentation of -vsync

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Originally committed as revision 22739 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Michael Niedermayer 2010-03-31 00:41:31 +00:00
parent 330d86f593
commit 49553ec865
1 changed files with 9 additions and 2 deletions
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doc/ffmpeg-doc.texi
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@ -757,8 +757,15 @@ Repeatedly loop output for formats that support looping such as animated GIF
@item -threads @var{count} @item -threads @var{count}
Thread count. Thread count.
@item -vsync @var{parameter} @item -vsync @var{parameter}
Video sync method. Video will be stretched/squeezed to match the timestamps, Video sync method.
it is done by duplicating and dropping frames. With -map you can select from 0 Each frame is passed with its timestamp from the demuxer to the muxer
1 Frames will be duplicated and droped to achive exactly the requested
constant framerate.
2 Frames are passed through with their timestamp or droped so as to prevent
2 frames having the same timestamp
-1 Chooses between 1 and 2 depending on muxer capabilities. This is default.
With -map you can select from
which stream the timestamps should be taken. You can leave either video or which stream the timestamps should be taken. You can leave either video or
audio unchanged and sync the remaining stream(s) to the unchanged one. audio unchanged and sync the remaining stream(s) to the unchanged one.
@item -async @var{samples_per_second} @item -async @var{samples_per_second}