[FFmpeg-trac] #1851(swscale:reopened): libswscale does incorrect range conversion for RGB->YUV and RGB->RGB

[FFmpeg]

#1851: libswscale does incorrect range conversion for RGB->YUV and RGB->RGB
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             Reporter:  gjdfgh      |                    Owner:  (none)
                 Type:  defect      |                   Status:  reopened
             Priority:  normal      |                Component:  swscale
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Changes (by Balling):

 * status:  closed => reopened
 * resolution:  invalid =>

Comment:

 >Please do not reopen ancient tickets.

 https://w3c.github.io/PNG-spec/#cICP-chunk

 PNG cICP now requires limited range RGB. HAHAHA, wasted.
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Ticket URL: <https://trac.ffmpeg.org/ticket/1851#comment:8>
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