[FFmpeg-trac] #9637(ffmpeg:open): Color matrix behaviour in colr box

[FFmpeg]

#9637: Color matrix behaviour in colr box
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             Reporter:  Ulysse       |                    Owner:  (none)
  Dansin                             |
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:  ffmpeg
              Version:  git-master   |               Resolution:
             Keywords:  x265 hdr     |               Blocked By:
  color_matrix colr_box              |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Changes (by Balling):

 * status:  new => open

Comment:

 Your original file is not actually encoded with BT.2020 CL. That is why it
 happens. No, PQ (PQ is HDR and HDR is PQ) does not support CL. Use ICtCp,
 tjat has both CL and CI.

 Of course I agree that nclx atom should not use CL and should not preserve
 the "original" values like this. There is prefix SEI for that after all.

 Also mediainfo think that the conatiner values should overwrite the VUI in
 SPS data (AVIF mandates it) it is not actually the case in ffmpeg.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9637#comment:1>
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