[FFmpeg-trac] #11182(swscale:closed): yuvtestsrc and yuv444p->rgba->yuv444p conversion result in huge difference

[FFmpeg]

#11182: yuvtestsrc and yuv444p->rgba->yuv444p conversion result in huge difference
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             Reporter:  Andrew-R     |                    Owner:  (none)
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:  swscale
              Version:  unspecified  |               Resolution:  invalid
             Keywords:  colorspace   |               Blocked By:
  color_primaries                    |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Balling):

 The over/under-shooting doesn't occur.

 Both occur due to lossy x264 behaviour or due to 420 conversion or when
 you render Sony playstation games it used Superwhite quite often. LG C9
 provides 109% superwhite option. You can also add it artifiically to
 encode wide color gamut, as was done in limited range only, never full
 range xvYCC.
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Ticket URL: <https://trac.ffmpeg.org/ticket/11182#comment:21>
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