Thanks for the above - I was pulling the commands from NVidia’s developer site - it seemed like it exposed a subset vs FFMPEG overall - I also noticed from some of the logs that hevc_nvenc is the new name for the encoder and that nvenc_hevc has been deprecated.
So I’ll try this modification to the encoding profile:
[----------------------]
[MKV HVEC Constant Quality]
Description=WARNING: Handbrake Constant Quality encoding (25) with Nvidia HVEC.
order=ffmpeg, handbrake
AllowH264CopyRemuxing=true
FixedResolution=true
AutoDeinterlace=true
ffmpeg-UsingHardwareEncoding=True
ffmpeg-general=-threads 0 -hwaccel auto
ffmpeg-video=-ss 9 -c:v hevc_nvenc -cq 25 -rc vbr -map 0:v
ffmpeg-audio=-acodec ac3 -ab 192k -map 0:a
ffmpeg-audioac3=-acodec ac3 -ab 384k -map 0:a
ffmpeg-ext=.mkv
ffmpeg-audiodelay=skip
handbrake-UsingHardwareEncoding=true
handbrake-general=--decomb --denoise="weak" --loose-anamorphic --verbose=2 -T -O
handbrake-video=--start-at duration:3 -e x265 -q 18
handbrake-audio=-E ffac3 -R auto -B 192 -D 0 -a 1,2,3,4,5
handbrake-audioac3=-E ffac3 -R auto -B 384 -D 0 -a 1,2,3,4,5
handbrake-ext=.mkv
handbrake-audiodelay=skip
PreConversionCommercialRemover=true