[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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Comment (by Ulysse Dansin):

 Replying to [comment:6 Balling]:
 > BTW, who produces such bad files, looks like you use ffmpeg too? There
 is only one player that supports constant luminance like that (mpv) and
 even then bt.2020-cl is not supported with pq transfer. I saw it on 8k
 sattelites but even there sdr [transfer] was used.

 Us :) We were investigating the behavior of colr box with different inputs
 when we saw the mismatch between colr box and NAL SPS for one of our QA
 tests... Our current encodes are using bt.2020-ncl with ST2084. Thanks so
 much for your help!
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Ticket URL: <https://trac.ffmpeg.org/ticket/9637#comment:7>
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