HEVC 10bit encoding with nvenc doesnt support CRF encoding

[teb]

hi, any reason why this isnt enabled? Handbrake got it in the nvenc mode..

[cdgriffith]

That is entirely dependent on the encoder itself, and does not exist in rigaya encoders:

https://github.com/rigaya/NVEnc/blob/master/NVEncC_Options.en.md#encode-mode-options