Devices > Video Cards, Monitors, Televisions, and Projectors
UHD/HDR/3D Setup
rec head:
I know some of you have similar setups so I thought I'd ask here about settings for playing 4K HDR rips.
Setup is HTPC w/1060 ->Denon 4300 -> 2016 LG OLED.
When I use RGB in the Nvidia settings I get random white noise and loose a lot of detail in the darkest areas of some content. It doesn't happen everywhere. The opening sequence in Shape of Water is a good example.
I noticed the white sparkles a while back and immediately thought it was the cable. Bought new ones and it didn't help. I've had similar HDMI issues in the past and I still thought it was an HDMI issue so I bought an HDMI splitter to go between the HTPC and AVR. Voila! It worked, sparkles gone. Then some months later after some messing with video settings the sparkles came back. While testing I realized I was missing a lot of detail in those dark scenes. Since it was always new content that I was watching I didn't know until switching back and forth.
I don't know if different versions of the drivers are causing this or what exactly the problem is. It is possible that the splitter didn't do anything but that I had changed a setting or driver and not viewed the troubled content until after getting the switch.
The question is are those of you with similar setups using RGB mode in the Nvidia settings?
tij:
I had a sparkles with HDMI 4K cables
tried different brands and length
still sparkles (only on highest setting
4k RGB @60fps)
was considering those super duper expensive Monster cables ... but then gave a shot to CERTIFIED HDMI cable (choose correct certification) ... no more troubles anymore (cable is 1.5m long)
basically CERTIFIED cables guarantee speed ... lousy so called 4K HDMI cables only work for BluRay players as those only do 4K at 4:2:2 at 23fps (but connect those to PC and run RGB at 60fps ... and all hell starts)
I have no problems with black levels running in MadVR ... desktop had a problem with blacks (look more grey ... especially when supposedly black screen saver screen show) ... solved that by setting [dynamic range] to full in NVIDIA control panel
rec head:
Thanks. I really don't think it is the cables. It seems settings or more likely settings+drivers based.
tij:
One way to test if its cable ... is to drop resolution to 1080p60 RGB or 4:4:4 ... if no sparkles ... then likely cable has not enough bandwidth to do 2160p60 RGB, and information get lost ... hence sparkles
stricko:
Just done a bit of an upgrade (projector to Optoma UHD51 and graphics card to GT1030) and was looking forward to 4k and UHD playback, but I've run into the same problems as people seem to be having on this thread. Set PC display to 4k, 4k stuff plays fine, 3d is displayed SBS, but projector doesn't recognise it as 3d. Set display to 1080p, 3d is fine, 4k is downscaled (as you'd expect). Sound familier?
I was sort of hoping that MC would deal with it all automatically, but I guess that is not the case.
I'll be having a play with some of the ideas in this (and other) threads, and I'll let you know how I'm getting on. (W10/64 up to date and latest Nvidia drivers). Cheers
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