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-async and -vsync documentation. Based on info from the mailinglist.

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Originally committed as revision 6028 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Benjamin Larsson 2006-08-19 20:00:22 +00:00
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doc/ffmpeg-doc.texi
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@ -504,6 +504,16 @@ streams. This option is used for automatic FFserver testing.
@item -loop_output number_of_times @item -loop_output number_of_times
Repeatedly loop output for formats that support looping such as animated GIF Repeatedly loop output for formats that support looping such as animated GIF
(0 will loop the output infinitely). (0 will loop the output infinitely).
@item -vsync parameter
Video sync method. Video will be stretched/sqeezed to match the timestamps,
it is done by duplicating and droping frames. 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 samples_per_second
Audio sync method. "Stretches/sqeezes" the audio stream to match the timestamps,
the parameter is the maximum samples per second by which the audio is changed.
-async 1 is a special case where only the start of the audio stream is corrected
without any later correction.
@end table @end table
@node FFmpeg formula evaluator @node FFmpeg formula evaluator