Hello,
AV1 is generally more efficient than HEVC encoding, but for high quality output with less priority on file size reduction I would recommend trying -c:v av1_nvenc -preset p7 -tune hq -cq:v 20 -rc-lookahead 48
-rc-lookahead can be adjusted based on the framerate of the input file, but usually it’s recommended to set this to double the framerate.
Here’s a good resource for comparing different options in the CPU and GPU encoders.
