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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}
Thread count.
@item -vsync @var{parameter}
Video sync method. Video will be stretched/squeezed to match the timestamps,
it is done by duplicating and dropping frames. With -map you can select from
Video sync method.
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
audio unchanged and sync the remaining stream(s) to the unchanged one.
@item -async @var{samples_per_second}