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Originally Posted by soresu
Even the big 10 bpc AVX2 dump only covers film grain for 420 content, but as that covers probably everything currently on Youtube or any other commercial source using AV1 significantly it should be fine for most people.
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Yeah, I don't see any reason why content distribution beyond 4:2:0 10-bit would happen in the 2020s. Especially where software decode may be required, as 444 is about half the speed without any quality advantage in >99% of content.
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There is also the beginnings of 10 bpc NEON optimisations though which was added just before 0.9 - so I would expect either a 0.9.1/0.9.2 to cover it all before too long since it was only a couple of months from the first NEON 8 bpc FG patch to the last.
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I would anticipate that 8-bit will be standard for where SW decode is needed, and 10-bit for HW, unless the perf overhead of 10-bit drops to <25% over 8-bit.