was looking at how exactly HDR info travels in production environment. https://community.adobe.com/t5/premiere-pro-beta-discussions/discuss-color-management-improvements-h264-hevc-xavc-l-and-xavc-slog/m-p/12390588
===== Francis-Crossman Adobe Employee Sep 17, 2021 This expands the list of color managed codecs. H264/HEVC represents the majority of DSLR and mirrorless prosumer cameras on the market, and XAVC-L / XAVC Slog are heavily used in broadcast HDR workflows. “Color managed” means that Premiere Pro read the color tags in the file metadata and accurately converts the file to the sequence color space. If the color spaces of the file and sequence are the same, the Premiere Pro passes the colors through to the sequence without conversion. Color management is necessary for HDR production. Codecs that are not color managed will always be interpreted as Rec709, which worked just fine for a long time. But with HDR becoming more and more mainstream, proper color management is necessary. Full list of color managed codecs Codec Wrapper Color Space New? Apple ProRes · 422 HQ · 4444 · 4444 XQ .MOV Rec. 709 Rec. 2100 HLG Rec. 2100 PQ Previously supported Sony XAVC-I (all intra) .MXF Rec. 709 Rec. 2100 HLG Previously supported Sony XAVC-L (long GOP) .MXF Rec. 709 Rec. 2100 HLG NEW H.264 / HEVC (H.264) .MP4, .MOV Rec. 709 Rec. 2100 HLG Rec. 2100 PQ NEW ===== so in this case he talked about importing colorspace-tagged material, not embedded icc or display side. x264 support for XVAC-intra + HDR metadata was merged few years ago: https://forum.doom9.org/showthread.php?p=1950549 https://forum.doom9.org/showthread.php?p=1940382 https://code.videolan.org/videolan/x264/-/merge_requests/5 I still wonder how you get those values for mastering display? G(x,y)B(x,y)R(x,y)WP(x,y)L(max,min) hm may be like here, vua libdisplayinfo/EDID https://github.com/doitsujin/dxvk/blob/master/src/wsi/wsi_edid.cpp#L14 from https://github.com/libsdl-org/SDL/issues/6587 but ofc there us dev blog saying edid can be incomplete/inaccurate: https://planet.kde.org/xavers-blog-2024-05-10-hdr-and-color-management-in-kwin-part-3/ ==== There is a fourth option though: Use the color information from the display’s EDID. In Plasma 6.1, you can simply select this in the display settings. color profile settings Note that it comes with some caveats too: the EDID only describes colors with the default display settings, so if you change the “picture mode” or similar things in the display settings, the values may not be correct anymore the manufacturer may not measure every panel and just put generic values for the display model into the EDID the manufacturer may put completely wrong values in there (which is why this is disabled by default) even when correct values are provided, ICC profiles have much more detailed information on the display’s behavior than the EDID can contain ==== but at least this round of search shows that SDL(2.x, 3?) does have some support for HDR now, so may be it also an option!
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