[FFmpeg-trac] #7186(undetermined:new): use " -c copy ", but the output's duration and file size doubled

FFmpeg trac at avcodec.org
Thu May 3 11:20:00 EEST 2018


#7186: use  " -c  copy ", but  the output's duration and file size doubled
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             Reporter:  zjj1209354   |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by mkver):

 Your video has two edit list entries each of which says that the whole
 video should be played from the beginning to the end; your audio has no
 edit list. ffmpeg honours these edit lists when it demuxes the file and
 that explains what you have experienced. This is actually a complete
 duplicate of #6832 (including the fact that the file is actually invalid
 because the duration in the media header box for the video track is not
 the sum of the durations of the entries of the edit lists).
 You can use the ignore_editlist argument for the mp4 demuxer.
 Unfortunately the muxer creating this file seems to be dead so files like
 these will continue to be created.
 (Btw: the most recent version of MKVToolNix (23.0) has a workaround for
 broken files like these so that the video isn't duplicated with it any
 more.)

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Ticket URL: <https://trac.ffmpeg.org/ticket/7186#comment:2>
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