zimg

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How does libgsl.a compile into libzimg.a? I want to use the gls function writing algorithm.

chenshanyi

Color space conversion happens under premultiplied alpha

1

As far as I can infer from the code and have observed empirically, zimg premultiplies alpha before performing color space conversion. This has unexpected consequences when the conversion is nonlinear....

LoadingByte

Add `use_scene_referred` to `zimg_graph_builder_params`

4

As the title says, adds this param to the public API. I also edited the test example to include it. I don't know if you didn't want the changelog to...

Setsugennoao

Feature request: CIELAB and/or CIECAM02 colorspace.

1

As far as I can tell, zimg currently lacks a proper perceptually uniform color space (except, arguably, ICtCp). They’d be very nice to have, imo, seeing as they appear to...

Lypheo

Possibility of implementing YCCK color transform as available in some jpeg files?

8

For more info read: http://halicery.com/Image%20Decoders/JPEG/JPEG%20notes/CMYK.html

richardpl

Feature request: Quality-optimized subsampling

2

There are methods for producing 4:2:0 subsampled video that aim to provide more optimal results once displayed (both subjectively, and via cross-coefficient PSNR and CIEDE2000 metrics): https://norkin.org/pdf/SPIE_2016_HDR_conversion_metrics.pdf Despite the HDR...

tdaede

Fix unit tests on big endian systems

2

mgorse

Very useful for GaussianBlur with large sigmas: ```py def gauss_fmtc(src: vs.VideoNode, sigma: float = 2) -> vs.VideoNode: wsrc, hsrc = src.width, src.height wdown, hdown = round(wsrc/sigma), round(hsrc/sigma) src = src.resize.Bilinear(wdown,...

dnjulek

Dolby Vision Profile 5/7 (RPU) support

4

Reverse-engineering documentation: https://github.com/testing-av/testing-video/blob/master/core/src/main/java/band/full/video/dolby z.lib changes needed: add new API to receive per-frame RPU data. Will cause ABI compatibility break Pending: documentation of RPU-related equations is incomplete

sekrit-twc

SMPTE 240M discussion

20

sekrit-twc