--icc-force-contrast does not work with --vo=gpu-next
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Description
icc-profile-auto
icc-force-contrast=inf
--vo=gpu:
--icc-force-contrast=inf should turn BT.1886 gamma curve into pure power 2.4, but it doesn't with --vo=gpu-next:
--vf=format:gamma=gamma2.4 can be used as a workaround.
Log:
output.txt
latest mpv & libplacebo git-master as of today.
Tested on Linux Xorg.
I btw. still think that pure power gamma 2.4 would be a better default for rec709 content, as BT.1886 just looks too bright with most of the content on any display that doesn't have an extremely low black point.
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Research direction
Reproduce with --vo=gpu-next, icc-profile-auto, and icc-force-contrast=inf on Linux Xorg, comparing the result with --vo=gpu and the gamma=gamma2.4 workaround. Trace the gpu-next/libplacebo color-management path and verify that forcing contrast produces a pure power 2.4 curve rather than BT.1886 behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c, linux
- Domain
- cli, computer-graphics
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100