I know but result of that translation is bad enough or some 'know how' must be known to get it working well.
Besides - I don't really sure libplacebo (only?) do desirable color transformation (HLGtoSDR) or VLC uses something else - I'm not programmer at all and moreover I'm not shader programmer (
Here's somehow working HLGtoSDR shaders
https://transfiles.ru/svler - Convert HDR to SDR.hlsl in HDR folder work well enough but for ordinary HDR files like 23_Samsung_HDR_Wonderland.mkv (97 MB)
https://yadi.sk/i/ZgkOWjcEwWQNkQ - not for HLG files like 20190831-160457_RTL UHD.mkv (135 MB)
https://yadi.sk/i/SRloXWrOP-L-xA
I even don't know that (not in HDR folder) shaders was taken from
libplacebo or somewhere else
PS. Here's long time (more than 4 minutes) test files
https://forum.doom9.org/showthread.p...34#post1919134