Quote:
Originally Posted by cretindesalpes
If your input is YUV422P10 it must be converted to 4:4:4 before applying the matrix, and converted back to 4:2:2 after. This is how it should be done. This will yield a more reliable result than for example ColorMatrix, which processes the chroma without taking the luma into account (well, this is not important for the specific 601<->709 case), and processes the luma by point-resizing the chroma on the fly. This approximation is fast but not very accurate.
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So matrix on something other than 4:4:4 is not just not yet implemented, but is not implemented on purpose?