How to scale 2160p i420 to 1080p i444 without rescaling chroma (UV) components?
So, since the UV components in a YUV i420 source are half the resolution of the full-res luma (Y′) component:
How does one re-scale a i420 2160p source to a i444 1080p source without re-scaling the UV components thus keeping their original quality/resolution/detail/...?
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