[Gereral1]

Ah, now I understand the point of the project. Quite nice, and really well done. But not exactly what I'm after then. Having to manually adjust my TVs brightness would quickly become a chore, so I need a solution where the TV is properly told there is HDR going on, so it will trigger the brightness changes etc.. But you've done some really good work!
Er you familiar with any such solutions? Would the recent PowerDVD version that supports UHD Blu-ray be sufficient? (If you have a 10-series Nvidia card)

You can always try madvr and use the sdi function set nit value to 400 and it will try to convert HDR to its best ability. This is DCI . As for XDR it's not adjusted on TV. It's done in mpcbe and saved to an XDR.Cal file to be added automatically then reset on exit. Your desktop and TV remain untouched! Have achieved wonderful results with assins Creed UHD, lala land and fate and furious. Also add 10 point contrast and -3 to my blurays and they now pop and the dull colors are gone on my whole Blu-ray collection. Great toolif you have a good eye for video.