So I was wondering if some kind of 3d lut can be saved in media files directly ...and answer seems to be yes?
https://github.com/google/lut3d_utils "A tool for manipulating production metadata, specifically tone map metadata (3D LUT), in MP4 and MOV files. It can be used to inject 3D LUT metadata into a file or validate metadata in an existing file." I wonder if libavformat's mov de/muxer can be extended for handling those cases .....
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