[FFmpeg-trac] #1678(undetermined:new): Regression with -vsync 1

FFmpeg trac at avcodec.org
Sat Aug 25 15:56:53 CEST 2012


#1678: Regression with -vsync 1
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             Reporter:  jwjwjw       |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by jwjwjw):

 I don't think it is an issue with vlc. I don't have MPlayer but I also see
 the problem using ffplay.

 I am recording a longer clip now. But even with the previously provided
 clip, converting it to an image sequence shows the problem:

 ffmpeg -i bbc1-fail.mov badjpg/video%d.jpg
 ffmpeg -i bbc1-ok.mov goodjpg/video%d.jpg

 Despite having identical frame rates and audio, the scene changes from the
 track to the man in vision at video402.jpg in the 'fail' clip and
 video400.jpg in the 'ok' clip. Do you see that too, and if so, isn't that
 confirmation of the bug as it's changing 2 frames later in the failed clip
 so the sync is out by 2 frames?

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1678#comment:3>
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