https://source.ffmpeg.org/gitweb/ffmpeg.git/commit/677cf95ea4be805fa326adb08... looks like it uses standard one input-one output, so it may even work in cinelerra-gg, if nothing else broke.. Not sure how to properly define configuration for such filter - may be Blender have some GUI for this? Random link I stumbled upon while looking at OCIO search results - some notes on digital photography, it seems? https://juraj-notes.tomori.sk/