Originally Posted by Onkyoman
Is the TV being output at 25 Hz by the GPU or 50 Hz? If it is 25 Hz from the GPU and 50 Hz at the display, then 12-bit RGB is possible. If is being sent out at 50 Hz from the GPU, then it must be a typo in the OSD. You can check the GPU control panel during playback to see what it says.
GPU is set to 50 hz and the OSD reads “display 50.0000” ( or something like that - not home at the moment). LAV filters are set to use yadif for deinterlacing. ( can’t remember why - but I read at some point it could be useful to use the CPU to deinterlace before madVR processing).
The HTPC - running win 7 pro 64 - also keeps my NCP settings on reboot, with 417.71, using RGB, 50 hz,“blank” color depth, for desktop. Display is LG B7, using blu ray input icon.
(I am unsure what actually happens when a 12 bit RGB 23 hz signal arrives at the LG B7... And why this is better than Yrbrc 4:2:2 10 bit output, matching what the LG can actually handle on a Blu ray input icon.
Does the LG Dither in high quality from12 bit to the native 10 bit panel color depth? And if the LG B7 sub samples a 4:4:4 signal to 4:2:2 on the blu Ray input, why bother sending it? .)
I am unable to get NCP to accept same 12 bit setup on my new HTPC running win 10 (motherboard only had drivers for win 10) and 417.71 (also tried 418.xx no change). This HTPC is sourcing a JVC 7900 through a Denon X4400H - I have not tested it on the LG B7.
When entering the desktop resolution of 50 hz, instead of blanking color depth, it writes 8 bit. I switched fine between 23 hz 12 bit (UHD HDR) and 50 hz 8 bit, but it does not stick after reboot - all framerates are 8 bit then.
And HDR pass through does not work at 8 bit with the JVC... magenta bug.
Solution for the win 10 / JVC setup right now is desktop refresh rate set to 23 hz. Then it stays after reboot and switches correctly for 50hz sources (TV).
But setting up my JVC and madVR for HDR tone mapping is probably a better way to go rather than try to fix the NCP problem... Right?
I will have to read up on how to do that (calibrate the JVC for madVR tone mapping), without losing the ability to play 4K SDR sources on the JVC (I guess this is a question for a JVC thread...).
Any links to appropriate post(s) for that appreciated - reading so many threads right now on 4K HTPC builds, madVR (including on doom9 and on kodi), custom hdr curves on the JVCs, calibrating the JVC using JVC auto cal, it’s making my head spin 😱😁