[FFmpeg-trac] #2509(undetermined:new): Bigger MOOV headers regression

FFmpeg trac at avcodec.org
Sun Apr 28 23:26:54 CEST 2013

#2509: Bigger MOOV headers regression
             Reporter:  zimbatm      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
 Summary of the bug:

 FFmpeg's mp4 moov header is almost twice as big as when produced with
 MP4Box in some cases. I'm trying to hunt down why it's the case, esp.
 because it hasn't always been the case.

 How to reproduce:
 # NOTE: big-header-video.mp4 got cut from a larger 2h file
 % wget http://ffmpeg-debug.s3.amazonaws.com/big-header-video.mp4
 % ffmpeg -i big-header-video.mp4 -acodec copy -vcodec copy ffmpeg.mp4

 See https://gist.github.com/zimbatm/5473549 for the details on the
 investigation. It's a little bit mixed up because I didn't really know
 what I was looking for.

 I am still investigating the issue, please bear with me.

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2509>
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