[FFmpeg-trac] #7764(undetermined:new): Support for HW accelerated 10-bit -> 8-bit conversion support

[FFmpeg]

#7764: Support for HW accelerated 10-bit -> 8-bit conversion support
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             Reporter:  eero-t       |                    Owner:
                 Type:  enhancement  |                   Status:  new
             Priority:  wish         |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  vaapi        |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by eero-t):

 > Just got hit by this on AMD RAVEN APU with the same error, while trying
 to transcode 10bit hevc to h264 via vaapi

 * Does that HW '''and''' its driver support 10bit HEVC decode + 10-bit ->
 8-bit conversion i.e. are you sure it's FFmpeg VAAPI backend and not
 driver issue?
 * If yes, does it work if you add scaling, like happens with iHD?
 * If yes, have you still a problem in 4K like I have with iHD?

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Ticket URL: <https://trac.ffmpeg.org/ticket/7764#comment:5>
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