[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 Andrew-R):

 But if I want to turn bmp into yuv (y4m) stream, or import it on YUVA8
 timeline at some point there  will be rgb->yuv conversion via libswscale,
 and if it need color range/colorspace on *both sides* of conversion
 predefined ... May be I really should try and add GUI overrides  for those
 two params per file.
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Ticket URL: <https://trac.ffmpeg.org/ticket/11182#comment:29>
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