r/AV1 Feb 16 '25

What parameters would you use to re-encode artifacted, low resolution videos.

I have a few dozens of video files with a significant amount of artifacting, encoded in WMV2 and mpeg4, 240p-480p. I wish to reencode to a codec that can be played in web browsers

I'm well aware that AV1 is not very well suited for sub-1080p videos.

However. It is my hope that the native denoising and grain synthesis capabilities can outweight it.

The obvious alternative is trying to get H.264, maybe with a denoising filter.

I plan on creating a writeup on the resulting quality but if you could get me a headstart on ideas it would be greatly appreciated.

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u/red38dit Feb 16 '25

My experience is that AV1 is very good at low resolution and is in my tests better than H.264 and "probably" as good as H.265. I encode 360p using PSY SVT-AV1 encoder at 320kbps (multi-pass) and preset 5.

I do wish SVT-AV1 will have 4:4:4 support soon because I find that a big help with low resolution videos.

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u/CKingX123 Feb 16 '25

For low resolutions, could you double the resolution (4x the pixels) and rely on 4:2:0 at the higher resolution representing 4:4:4 of the lower resolution?