[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):

 There are other bugs still open

 https://trac.ffmpeg.org/ticket/3345
 https://trac.ffmpeg.org/ticket/7978

 I also tried to compare y4m files with vbindiff (console program) and they
 surely differ :(

 I also found suggestion by Paul (?) that input/output range must be always
 set, explicitly. I wonder how to handle this in our cinelerra-GG, given
 this data not always present at container/codec level, so we easily can
 get unknown....

 https://trac.ffmpeg.org/ticket/9407#comment:10

 also see top of https://trac.ffmpeg.org/ticket/3785#comment:16

 https://trac.ffmpeg.org/ticket/3801 - still open, but I am not worried
 about +/-1 right now .

 May be I should try dither=0 sws flag too
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11182#comment:25>
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