@mangeurdenuage you wrote about re-coding some series with av1 and opus a while ago, what software (and settings if it isn't too much trouble) did you use?

@bonifartius
It wasn't me, sadly my hardware is so old that it takes hours to even encode a few seconds.
Otherwise the best so far configuration I've seen using ffmpeg and the libaom library was in this torrent for the anime "Sewayaki Kitsune no Senko-san"
https://nyaa.si/view/1155615

Here's the .bat he made which contains the options. Note that this is from 2019 so there might be changes.

ffmpeg -i %1 -map 0 -c copy -c:v libaom-av1 -strict experimental -row-mt 1 -cpu-used 4 -tile-columns 3 -tile-rows 0 -crf 50 -b:v 0 -pass 1 -passlogfile "%~dpn1_HD08a" -arnr-max-frames 7 -lag-in-frames 24 -g 240 -auto-alt-ref 1 -pix_fmt yuv420p -sws_dither none -an -sn -dn -f null NUL
ffmpeg -i %1 -map 0 -c copy -c:v libaom-av1 -strict experimental -row-mt 1 -cpu-used 4 -tile-columns 3 -tile-rows 0 -crf 50 -b:v 0 -pass 2 -passlogfile "%~dpn1_HD08a" -arnr-max-frames 7 -lag-in-frames 24 -g 240 -auto-alt-ref 1 -pix_fmt yuv420p -sws_dither none -c:a libopus -b:a 64k -af aformat=channel_layouts="stereo" "%~dpn1_1080a_temp.mkv"
mkvmerge.exe -o "%~dpn1 [AV1 1080p 8bits q50][opus 64kbs].mkv" "%~dpn1_1080a_temp.mkv"
del "%~dpn1_1080a_temp.mkv"
del "%~dpn1_HD08a-0.log"
pause
EXIT

@mangeurdenuage cool thanks! my most powerful computer is amd fx-8350 from decade ago. i use it mostly for compiling stuff - it has 16 threads so still is pretty good for that, let's see how well it is with encoding :)

i have some old things i want to archive which use ridiculously amounts of space compared to things like av1, and chances that anyone will re-rip them with modern encodings is pretty slim. so i might as well give reencodings a shot, maybe the quality will still be ok and it doesn't take too much time.