[FFmpeg-cvslog] r14736 - trunk/doc/ffmpeg-doc.texi

[stefano]

Author: stefano
Date: Wed Aug 13 21:49:37 2008
New Revision: 14736

Log:
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


Modified:
   trunk/doc/ffmpeg-doc.texi

Modified: trunk/doc/ffmpeg-doc.texi
==============================================================================
--- trunk/doc/ffmpeg-doc.texi	(original)
+++ trunk/doc/ffmpeg-doc.texi	Wed Aug 13 21:49:37 2008
@@ -429,6 +429,12 @@ Select the pass number (1 or 2). It is u
 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:
+ at 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
+ at end example
 
 @item -passlogfile @var{file}
 Set two pass logfile name to @var{file}.