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Originally Posted by Terka
Its rather complicated also because the interlace. My goal is to achieve the best i can pull of of the source.
Luma is compressed by 50% because of interlace 4:2:0
Cr by 50% and again by 25% => 12,5%
Cb by 50% and again by 25% => 12,5%
I might go for upsampling. Question is which should i use - if going to 4:2:2 or even 4:4:4 is not overkill. Not sure how the filesize will change.
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Yes, interlaced 4:2:0 chroma has issues
Upsampling depends a lot on the source quality. Sometimes there are other problems with the chroma
In general, I'd say upsampling the chroma has marginal benefits
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I can imagine that some kind of coloring based on the Luma, which has 4times higher resolution.
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There is chromareconstructor by feisty2, but it's very slow
http://forum.doom9.net/showthread.php?t=173005