Handbrake 10bit CLI(ONLY 10 bit)

It supports both 10-bit x264, and 10-bit x265. It also ONLY supports those x264/x265 variants, so if you’re using the standard 8-bit CLI, you’ll still want to keep it around.

It’s critical that when using it, you specify the encoder-profile. For example:

HandBrakeCLI-10bit.exe -i inputVideo.mp4 -o newVideo.mp4 -e x264_10bit --encoder-

profile high10
HandBrakeCLI-10bit.exe -i inputVideo.mp4 -o newVideo.mp4 -e x265_10bit --encoder-

profile main10

The important bits are:
-e x264-10bit –encoder-profile high10 (for x264 10-bit)
-e x265-10bit –encoder-profile main10 (for x265 10-bit)
…if you don’t include the encoder profile, it will *fail*.

As to the rest, if you’re new to using the CLI, you’re best to browse through the guide at:
https://trac.handbrake.fr/wiki/CLIGuide

Alternately you can type “HandBrakeCLI-10bit.exe –help” to see the options, but it’ll completely fill your screen. You can save all that text to a file instead to read with Notepad later with “HandBrakeCLI-10bit.exe –help > hb-help.txt”