[FFmpeg-trac] #8455(avcodec:open): 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:  (none)
                 Type:  enhancement  |                   Status:  open
             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 john123):

 Sorry for not following all of that, but did you imply some of those
 command line arguments would be able to work around the current bug?  I
 tried the 709 blob of arguments and the color_range blob, and neither
 seemed to do anything.  If there is some blob of arguments that would fix
 it, I would very much appreciate it, since I'm still sitting on MP4 videos
 that I can't convert to AV1/webm due to this bug.

 Is the current bug identical to the John Carmack bug, just with a
 different codec?  I've never understood why one was fixed, but the other
 has been left broken.
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Ticket URL: <https://trac.ffmpeg.org/ticket/8455#comment:14>
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