[FFmpeg-trac] #8493(avformat:reopened): Allow setting mastering display metadata and content light level information in Quitcktime files

[FFmpeg]

#8493: Allow setting mastering display metadata and content light level
information in Quitcktime files
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             Reporter:  hubner       |                    Owner:  (none)
                 Type:  enhancement  |                   Status:  reopened
             Priority:  wish         |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  mov          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Chris Seeger):

 HEVC, AVC, VVC allow setting this data in an SEI message, but this is
 still required for the QuickTime/MP4 wrapper for other professional codecs
 like ProRes.  As you can see from the Apple Dev document, the atoms exist.
 Can ffmpeg populate them? MediaInfo parses the atoms.  Here's a sample:

 https://www.dropbox.com/scl/fi/qy56mbqvh96dayr1td7ms/PQ_1080_p59.94_BT
 .2111_Colorbars-mdcv-clli-v210.mov?rlkey=yzywjczn78egyv3f4dxyfjoqt&dl=0
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Ticket URL: <https://trac.ffmpeg.org/ticket/8493#comment:12>
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