[FFmpeg-trac] #4448(avformat:open): Support writing album cover art image embedded in ogg / opus metadata

[FFmpeg]

#4448: Support writing album cover art image embedded in ogg / opus metadata
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             Reporter:  llogan       |                    Owner:  (none)
                 Type:  enhancement  |                   Status:  open
             Priority:  wish         |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  ogg opus     |               Blocked By:
  metadata                           |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by iconoclasthero):

 Replying to [comment:14 neitsab]:
 > Just got caught by this, trying to transcode a Flac file with an
 embedded cover to an Opus file, only to find that the cover had been
 stripped and that there were no options to embed it into a matching
 stream:
 ⋮
 > As a workaround, opusenc works out-of-the-box without any extra option,
 but darn it it forces us to use another tool! ;-)
 >
 >
 > Dear devs please consider reviewing this 🙏🏻

 As another workaround to modify existing ogg/opus files (i.e., rather than
 opusen which cannot and only accepts wav/flac input) `opustags` as it can
 modify the ogg/opus file directly/in-place.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/4448#comment:15>
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