#10839: incorrect YCoCg to RGB conversion in swscale
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Reporter: Connor | Owner: (none)
Worley |
Type: defect | Status: reopened
Priority: wish | Component: swscale
Version: unspecified | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by Connor Worley):
Summarizing what I believe is wrong:
* In ffplay, going through vf_scale should cause an error after 45e09a3041
(vf_scale: use colorspace negotiation API), but ffplay does not set the
colorspace parameter on the buffersrc filter so some default conversion is
chosen.
* In ffplay, automatic conversion can erroneously happen without going
through vf_scale because the buffersink filter accepts YCoCg as a
mergeable colorspace.
* swscale silently returns nonsense coefficients for YCoCg
I would like for these things to work, but if they can't, I would much
rather they error than produce incorrect output.
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Ticket URL: <https://trac.ffmpeg.org/ticket/10839#comment:13>
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