From c52e13f1a154929808508def4ba9d3ba0c7a6fa1 Mon Sep 17 00:00:00 2001 From: Benjamin Larsson Date: Sat, 19 Aug 2006 20:00:22 +0000 Subject: [PATCH] -async and -vsync documentation. Based on info from the mailinglist. Originally committed as revision 6028 to svn://svn.ffmpeg.org/ffmpeg/trunk --- doc/ffmpeg-doc.texi | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/doc/ffmpeg-doc.texi b/doc/ffmpeg-doc.texi index 9f3f85146b..c9b7c22994 100644 --- a/doc/ffmpeg-doc.texi +++ b/doc/ffmpeg-doc.texi @@ -504,6 +504,16 @@ streams. This option is used for automatic FFserver testing. @item -loop_output number_of_times Repeatedly loop output for formats that support looping such as animated GIF (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 @node FFmpeg formula evaluator