[FFmpeg-trac] #9972(undetermined:new): Converting audio with cover art fails with MXF output.

[FFmpeg]

#9972: Converting audio with cover art fails with MXF output.
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             Reporter:  steipal      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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 It seem that converting audio (mp3 in this case) with cover art does not
 behave consistant. Here's some examples with the attached file:
 {{{
 ffmpeg -r 25 -i cover.mp3 -filter_complex loop -ar 48k cover.mov
 ffmpeg -r 25 -i cover.mp3 -filter_complex loop -ar 48k cover.mp4
 ffmpeg -r 25 -i cover.mp3 -ar 48k cover.avi
 ffmpeg -r 25 -i cover.mp3 -ar 48k cover.mkv
 ffmpeg -r 25 -i cover.mp3 -filter_complex loop -ar 48k cover.mxf
 }}}
 With the first two (mpv/mp4) I had to add -filter_complex loop to make it
 work. A simple -vf loop did not work. Not sure why cause I would expect
 them to behave the same.
 The other two (avi/mkv) worked without any looping needed.
 The mxf one fails with all combinations I've tried so far. It does create
 the file but it's one frame (0.04 duration) instead of the expected 14
 frames, about 0.58 in duration.
 "Cleaning" through piping is not an option. I need to do direct
 converting.

 I'm using master built 12. Oct. 2022
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Ticket URL: <https://trac.ffmpeg.org/ticket/9972>
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