#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):
"Interesting technology, but probably not something ffmpeg can do (or
expose to external use). "
Yes, encoding negative RGB into alpha channel is insane. It does utilise
it, as zscale support xvYCC, which is what those "illegal" YCbCr values
are (at the time where Silicon graphics was Nvidia, lol, it may have been
illegal, but even then BBC wrote some quides how to limit data in YCbCr).
Paul fixed some code so some of the LUTs are also preserving these data.
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Ticket URL: <https://trac.ffmpeg.org/ticket/11182#comment:31>
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