[FFmpeg-trac] #4780(undetermined:new): FFMpeg ignores the logfile of first pass when encoding through libxvid

FFmpeg trac at avcodec.org
Tue Aug 18 15:22:20 CEST 2015


#4780: FFMpeg ignores the logfile of first pass when encoding through libxvid
-------------------------------------+-------------------------------------
             Reporter:  academic     |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:
              Version:  git-master   |  undetermined
             Keywords:  passlogfile  |               Resolution:
  libxvid regression                 |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by cehoyos):

 * keywords:   => passlogfile libxvid regression
 * priority:  normal => important
 * component:  ffmpeg => undetermined


Comment:

 I tested the following:
 {{{
 $ ffmpeg -f lavfi -i testsrc -vcodec libxvid -vb 80k -pass 1 -passlogfile
 log.pass -t 60 -y out1.avi
 $ ffmpeg -f lavfi -i testsrc -vcodec libxvid -vb 80k -pass 2 -passlogfile
 log.pass -t 60 -y out1.avi
 $ ffmpeg -f lavfi -i testsrc -vcodec libxvid -vb 200k -pass 1 -passlogfile
 log.pass -t 60 -y out2.avi
 $ ffmpeg -f lavfi -i testsrc -vcodec libxvid -vb 200k -pass 2 -passlogfile
 log.pass -t 60 -y out2.avi
 }}}
 The output files have different size, the size changes when I empty the
 log file (that is present) between first and second pass, so I don't think
 the log file is ignored. What do I miss?

 If this is a regression, please point us to the exact change introducing
 the issue.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4780#comment:1>
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