Would it be possible to add an option to override source clip color space?
Not sure how common this problem is, but at least my phone writes incorrect color space metadata to video files in some cases. Color primaries and matrix in metadata is set to bt709 but it should be bt2020. Because of this, colors are slighty off or washed out.
For example, those problematic videos have correct colors when using:
ffplay -i <video> -vf scale=in_color_matrix=bt2020:out_color_matrix=bt709:in_primaries=bt2020:out_primaries=bt709