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Niklas Haas authored
Doing this with REDUCE_FORMATS() instead of swap_color_*() is not only shorter, but more importantly comes with the benefit of being done inside a loop, allowing us to correctly propagate complex graphs involving multiple conversion filters (e.g. -vf scale,zscale). The latter family of swapping functions is only used to settle the best *remaining* entry if no exact match was found, and as such was never the correct solution to YUV colorspaces, which only care about exact matches.
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