[FFmpeg-cvslog] r15969 - trunk/doc/ffmpeg-doc.texi

[stefano]

Author: stefano
Date: Mon Dec  1 09:27:53 2008
New Revision: 15969

Log:
Improve documentation for the -pass and -passlog options. Add mention
to how the log file is used and specify the default log file name.


Modified:
   trunk/doc/ffmpeg-doc.texi

Modified: trunk/doc/ffmpeg-doc.texi
==============================================================================
--- trunk/doc/ffmpeg-doc.texi	(original)
+++ trunk/doc/ffmpeg-doc.texi	Mon Dec  1 09:27:53 2008
@@ -439,10 +439,11 @@ tell that the raw codec data must be cop
 Use same video quality as source (implies VBR).
 
 @item -pass @var{n}
-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.
+Select the pass number (1 or 2). It is used to do two-pass
+video encoding. The statistics of the video are recorded in the first
+pass into a log file (see also the option -passlogfile),
+and in the second pass that log file is used to generate the video
+at the exact requested bitrate.
 On pass 1, you may just deactivate audio and set output to null,
 examples for Windows and Unix:
 @example
@@ -451,7 +452,9 @@ ffmpeg -i foo.mov -vcodec libxvid -pass 
 @end example
 
 @item -passlogfile @var{file}
-Set two pass logfile name to @var{file}.
+Set two-pass log file name to @var{file}. Default name is
+ at file{ffmpeg2pass-N.log}, where N is a number specific to the output
+stream.
 
 @item -newvideo
 Add a new video stream to the current output stream.