[FFmpeg-trac] #8455(avcodec:new): libaom-av1 damages brightness range by switching yuvj420p to yuv420p

[FFmpeg]

#8455: libaom-av1 damages brightness range by switching yuvj420p to yuv420p
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             Reporter:  john123      |                    Owner:
                 Type:  enhancement  |                   Status:  new
             Priority:  wish         |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  libaom       |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by pdr0):

 No, it's fundamentally the same. Full range 4:2:0 in ffmpeg parlance is
 "yuv420j"

 You could try making the patch for the pixel format; but the full range
 flag  should also be implemented in the official AOM AV1 library (like it
 is for official AVC, HEVC specs in the VUI parameters for the bitstream) ,
 otherwise it might break compliance with official streams, official
 decoders.

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Ticket URL: <https://trac.ffmpeg.org/ticket/8455#comment:10>
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