Direct Encode of hchcsen’s BDRemux: https://nyaa.si/view/1676768

Video:
AV1 main profile 0 1920x1080@10bit, crf 31
Audio:
5.1ch Opus 128kbit (JP)
Subs:
ASS - OZC/hchcsen

ffmpeg -i [infile] -c:v libsvtav1 -crf 31 -preset 2 -svtav1-params tune=0:enable-overlays=1:scd=1:scm=2:enable-tf=0:lookahead=120:pin=0:lp=8 -vf format=yuv420p10le -map 0 -acodec libopus -b:a:0 128k -filter:a:0 "channelmap=channel_layout=5.1" -c:s copy -threads 10 [outfile]