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JRVR Video Renderer

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mattkhan:
Any info on what exactly has changed? Is it described in some libplacebo config perhaps?

Do you think custom shader support can be exposed sooner rather than later btw?

Hendrik:
If you want to read about the major changes, only really the libplacebo changelog is where any information can be found. We are shipping a git master snapshot from yesterday.

gamut mapping: https://code.videolan.org/videolan/libplacebo/-/commit/64099247d799272b9c72997c0fc834426b02ccee
tone mapping: https://code.videolan.org/videolan/libplacebo/-/commit/c378870595d3254490183352057d07359da4d54c

Alas, I couldn't find any good one about the new histogram based peak measurements. And there are more tweaks and improvements all around.

Summary:
- Fancy math to improve gamut mapping (eg. reducing BT.2020 to BT.709), resulting in improved details
- Tone mapping is now done in the IPTQc4 colorspace, which improves the quality (its a derivative of the ICtCp/IPT colorspace specifically tuned for libplacebo, which is designed for image processing)
- Histogram for peak detection, improving the peak and average brightness values, excluding outliers

Some of the other features related to that will need hooking up to settings and providing the necessary metadata, those changes will come over the next builds.

SamuriHL:
Very kuel.  I'll give it a try soon.  I'm excited!

SamuriHL:
I don't think it's working properly for me on my LG G2.  It's not passing any HDR metadata to the display at all.

EOTF 2: SMPTE ST 2084 [PQ], MT: unknown, WP: unknown
GRN: 31982, 16503 [0.63964, 0.33006]
BLU: 14990, 29980 [0.2998, 0.5996]
RED: 7519, 2978 [0.15038, 0.05956]
WP: 15625, 16455, [0.3125, 0.3291]
Max/Min Lum: 0 / 0 nits
MaxCLL/FALL: 0 / 0 nits

And yes, I know how you have to enable HDR in windows before starting it.  Worked in 30, does not seem to work in 31.

Hendrik:
Verify settings maybe? HDR pass-through enabled in the JRVR config?

I could see metadata arrive with my HDFury Arcana.

Tone mapping with HDR output is coming once I put in the options for that, I assume within the next two weeks maybe.

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