[FFmpeg-trac] #4986(undetermined:new): video artifacts when encoding a 10 bit image sequence, using 10 bit build of x264

[FFmpeg]

#4986: video artifacts when encoding a 10 bit image sequence, using 10 bit build
of x264
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             Reporter:  spacediver   |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by spacediver):

 Yes, I think I meant values (so, in a PC RGB 8 bit context, encoding a
 pixel value of "0" would result in the minimum luminance, and 255 would
 result in the peak luminance).

 Your comment inspired me to do another test in 8 bit.

 The same problem occurs with values in an 8 bit gradient, which makes me
 think it might have something to do with the RGB to YUV conversion.
 Perhaps a 16-235 vs 0-255 range issue? Is there a way to preserve the
 "full swing" in the YUV conversion?

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Ticket URL: <https://trac.ffmpeg.org/ticket/4986#comment:2>
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