u/Alone_Suggestion_252

Moving from x264 to AV1, need advice

Hi, I’ve been encoding with x264 for a while using this config:

  • Preset: VerySlow
  • 2‑pass, 4700 kbps
  • tune: film
  • Everything else same as source
  • Config: aq-mode=3:qcomp=0.7

This gave me great results for micro 1080p.

Now I want to switch to AV1. I tested with Blade Runner 2049, and the encode took about 4–5 hours (similar to my x264 2‑pass times). But I’m not sure if my settings are optimal, because the output file size didn’t quite make sense to me.

First test:
AV1 10‑bit, preset 4, tune=vq, CRF 14, plus some advanced settings I can’t fully recall.
Result: 2 GB for a 2h40min movie.

Current test:
CRF 10, with these advanced options:
enable-qm=1:enable-variance-boost=1:film-grain-denoise=1:film-grain=12

(Left it encoding this morning, it said 5h) (btw, I use a ryzen 5 5600, it is not a best, thats why it isn't making sense to me)

Does anyone have suggestions for a good AV1 encoding setup that would be roughly equivalent to my old x264 quality (VerySlow, 4700 kbps 2‑pass, tune film)? I’m targeting transparent or near‑transparent quality for 1080p.

Thanks in advance!

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u/Alone_Suggestion_252 — 3 days ago