Library reqeust: enabling `libopencolorio`

[okaneco]

Would it be feasible to enable libopencolorio for full builds?
https://ffmpeg.org/ffmpeg-filters.html#ocio

My use case is for using the OpenColorIO filters to convert EXRs rendered from Blender into encoded media without intermediate color management tools.

Thanks

[GyanD]

Will look into it next week.