[FFmpeg-trac] #9856(avformat:new): MXF demuxer does not set AVStream::avg_frame_rate and ::r_frame_rate

[FFmpeg]

#9856: MXF demuxer does not set AVStream::avg_frame_rate and ::r_frame_rate
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             Reporter:  Pierre-      |                    Owner:  (none)
  Anthony Lemieux                    |
                 Type:  enhancement  |                   Status:  new
             Priority:  normal       |                Component:  avformat
              Version:  unspecified  |               Resolution:
             Keywords:  mxf          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Pierre-Anthony Lemieux):

 Replying to [comment:4 Tomas Härdin]:
 > Strange, countdown-small.mxf r_frame_rate=24/1 but avg_frame_rate=0/0.
 Perhaps some way to specify time code rate and drop frame via metadata
 would be an appropriate solution? In my experience relying on frame rate
 is brittle

 I like the idea of specifying timecode start, rate and drop frame in the
 metadata channels -- as opposed to merely specifying timecode start.

 Independently, I think it would be good if the MXF demuxer filled in
 avg_frame_rate for video tracks since it knows that information.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9856#comment:5>
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