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zanny | 4 years ago

I use either aom for trying to make "optimized" encodes of things to get quality at the smallest file size or svt for fast encodes that aren't really any more efficient than h265, just with the better codec.

I just transcoded some movies with vmaf of 98% from 4k hdr blurays this last week. Takes about two days of mostly single core work with cpu-used=4 on a 5950x but they get average bitrates of around 4400 kbps. Which is like, really, really good for hitting that quality target.

The trick is that since its mostly single core I just do 16 movies at a time, or 24 on my server.

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jaytaylor|4 years ago

I was like "wtf is vmaf?!"

Turns out it's $NFLXs OSS automated encoding quality assessment tool. Pretty cool!

https://github.com/Netflix/vmaf

p.s. zanny, nice casual stealth drop you did there ;)

zanny|4 years ago

I have no affiliation with Netflix, I just like using av1an which supports vmaf quality targets.

If Netflix wants to hire me, dm me, lol.