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| author | Erwan Ducroquet <erwan.ducroquet@gmail.com> | 2008-08-13 19:49:37 +0000 |
|---|---|---|
| committer | Stefano Sabatini <stefano.sabatini-lala@poste.it> | 2008-08-13 19:49:37 +0000 |
| commit | 850a8d42ab017c4726944414ecab0a46bfa3d280 (patch) | |
| tree | b8e013af9b39ae69b09ad7eb0d309d315de4c226 /doc/ffmpeg-doc.texi | |
| parent | 06cddea060870254675dbbe74e4e5bed6f7b6fc2 (diff) | |
| download | ffmpeg-850a8d42ab017c4726944414ecab0a46bfa3d280.tar.gz | |
Add examples in documentation showing how to avoid to decode audio and
output video in pass 1 for 2-pass encoding.
Patch by Erwan Ducroquet erwan _dot_ ducroquet _at_ gmail _dot_ com
Originally committed as revision 14736 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'doc/ffmpeg-doc.texi')
| -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 1660980e03..928751463b 100644 --- a/doc/ffmpeg-doc.texi +++ b/doc/ffmpeg-doc.texi @@ -429,6 +429,12 @@ Select the pass number (1 or 2). It is useful to do two pass encoding. The statistics of the video are recorded in the first pass and the video is generated at the exact requested bitrate in the second pass. +On pass 1, you may just deactivate audio and set output to null, +examples for Windows and Unix: +@example +ffmpeg -i foo.mov -vcodec libxvid -pass 1 -an -f rawvideo -y NUL +ffmpeg -i foo.mov -vcodec libxvid -pass 1 -an -f rawvideo -y /dev/null +@end example @item -passlogfile @var{file} Set two pass logfile name to @var{file}. |