[FFmpeg-trac] #3499(avformat:open): Error transcoding AVID H264 file with seek (-ss) option

[FFmpeg]

#3499: Error transcoding AVID H264 file with seek (-ss) option
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             Reporter:  chq.contact  |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  mxf h264     |               Blocked By:
  regression                         |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |
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Comment (by reimar):

 I would expect this is a broken file (beyond it having .mp4 extension when
 it is actually a MXF file).
 Broken in such a way that it fails to put the SPS/PPS into the video
 stream descriptor but instead puts it at the start of the stream.
 After the patch FFmpeg will generate a standard AVCI SPS/PPS, which stops
 FFmpeg from searching the video stream itself for them.
 One option might be to move the ff_generate_avci_extradata near the end of
 avformat_find_stream_info and/or make sure it is only used for actual
 AVCI.

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Ticket URL: <https://trac.ffmpeg.org/ticket/3499#comment:2>
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