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Old 10th December 2018, 21:35   #81  |  Link
SpasV
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Join Date: Nov 2013
Location: Sofia, Bulgaria
Posts: 31
Quote:
Originally Posted by jpsdr View Post
This is a plugin with functions made to work on HDR videos, but can also eventualy work to do some color conversions.

Note: ConvertXYZ_Scale_HDRtoSDR is a simple scalar function, i've made just to see what result it produces. Don't have expectations on this plugin, but if by luck it works for you...
Hi, I think you have succeeded. Great.
I haven't tried your work. I have some interest in programming video filters and I could do some work for you if you need.

Actually, I'm interesting in formal evaluating of color space transformations. In particularly, I've tried a simple transformation - truncating the color codes' two LSB, maybe analogous to ConvertXYZ_Scale_HDRtoSDR with this script:
Code:
DGSource("F:\Gladiator-2160p\Gladiator.hevc.dgi",i420=true,fulldepth=true)
z_ConvertFormat(width=1920,height=1080,pixel_type="YV12",dither_type="none"
to get an 2160p HDR (10-bit color) BluRay video conveted to 1080p SDR (8-bit) color retaining the Rec.2020/PQ color space.
Using Sony Catalyst Browse I've seen
Source: Rec.2020/PQ, Working Rec.709, Preview: Rec.709.
and video in the working space visually undistinguished from the source with waveform under 67 %.

So, I'm interested in programming a waveform/histogram generating Avisynth function.
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