I'm trying to convert some of my library to HEVC to save space. The idea being I re-encode the existing media and save 20-50% file size.
What would be some recommended settings for converting and having minimal quality loss, while saving as much file size as possible (quality over file size).
The current command I'll be using is generally
ffmpeg -i input.mkv -c:v hevc -c:a copy -crf ??? output.mkv
Note that encoding from the original medium is not an option for me right now. I would have to use the current files I have.