HDR encoding

[mparade]

If you simply want to signal use the options under x265->Signaling

I can do this only by using a lot of customly set parameters (not a problem), because Hybrid does not let me modify e.g. the matrix etc. So, I have to disable them and then
use them as custom parameters.

I just would like to be sure Hybrid does not dither the 10-bit source down to 8-bit and then convert it back to 12-bit (according to the output depth of the encoder).
Cropping can be made on a 10-bit source, right?