Devices > Video Cards, Monitors, Televisions, and Projectors
UHD 4K Blu-ray disc playing with "8-bit HDR"
Manfred:
10 bit works only if you have the correct settings in madVR/GPU/TV. e.g. my GTX 960 does not support 10 bit at RGB (0-255).
madbrain:
--- Quote from: Manfred on June 07, 2020, 08:06:01 am ---10 bit works only if you have the correct settings in madVR/GPU/TV. e.g. my GTX 960 does not support 10 bit at RGB (0-255).
--- End quote ---
I'm typing this response on my main desktop PC with a GTX 960 . With my LG32UD59-B monitor connected via DisplayPort, I have set 4K/60 Hz /RGB 10-bit in the nVidia control panel. My monitor isn't HDR, though, so it transmitting 10 bits probably doesn't buy me much. Spyder5Pro calibration shows that it has about 80% of 100% of DCI-P3 in 10 bits mode. I should switch to 8 bits and do another calibration to see if the % of DCI-P3 drops any.
On this card and monitor, CTRL-J playing an HDR 24 p movie, Star Wars: last Jedi shows this :
display : 59.99 Hz (10 bit RGB, full)
D3D11 fullscreen windowed (8 bit) <- not sure why it says windowed here, or 8 bits
primaries BT.2020 (says upstream)
HDR 1000 nits, BT.2020 -> DCI-P3
Edit: looks like MC won't switch to 24p on this monitor. Not sure if it's because it's part of a triple monitor setup, or because it just doesn't support 24 Hz. I tried to play with custom modes but didn't have any luck so far.
My HTPCs are using GTX 1050Ti and GTX 1030, though.
madbrain:
--- Quote from: tij on June 07, 2020, 02:11:04 am ---https://yabb.jriver.com/interact/index.php/topic,124136.0.html
--- End quote ---
Thanks, I will study this link.
--- Quote ---Setting RGB to 24/12 and playing 60fps movie ... MadVR able to switch to 60/8 and after movie successfully return to 24/12 ... keep in mind i am using NVidia (might be different for ATI)
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Thank you. Yes, I have found the same on my HTPC.
Correct me if I'm wrong, but I think the ideal settings on an HDMI 2.0 GPU are :
60/RGB 8 bits for the desktop to have the sharpest text and no laggy mouse movements
24/RGB 12 bits for playing HDR 24p movies
60/YCbCr422 10 bits (or 12 bits) for playing HDR 60p movies
What I'm looking for is a way to achieve all 3 without having to fiddle with the nVidia control panel repeatedly when I play a movie.
--- Quote ---I suspect this has nothing to do with MC … but rather video driver … sitting initially on 60/8, MadVR might not determine in real time if it can switch to 24/12 or 24/10 (depends on display connected to GPU) ... so it might go for safe 24/8
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You may be right, I just don't know. Would like a definitive answer on whether the current behavior is forced by the driver and/or OS, or whether it's something MC/MadVR could change, but currently does not.
--- Quote ---Mouse for me is not an issue as my PC is sitting in Theatre View and I use remote with no mouse.
--- End quote ---
Ah, not the case for me, though. I use other apps.
--- Quote ---If you want to pass video unprocessed … no point in using MadVR … for 4K - you use madVR to upsample chroma and can tone map HDR, which supposedly is much better than what is usually offered by TV/projectors (and imho it is much better)
But if you really want to pass video untouched to TV for processing … if your TV is DLNA render and is connected to network … can choose under [playing now] your TV … then when you play movie, it is send directly to your TV
--- End quote ---
The display in my home theater is a 4K projector, Optoma UHD65. It only accepts video signals from its HDMI or VGA inputs. There is no DLNA support or smart features of any kind. It isn't networked also. There is an Ethernet jack but it's not for end-users, only service.
The new display in my bedroom is a 4K TV, Samsung Q7DR 82". Not certain whether it supports DLNA or not. I just got it a week ago. I just downloaded the full PDF manual and a search for DLNA didn't find anything.
I think even if it did support DLNA, the Wifi would be the bottleneck in that case to play 4K HDR blu-ray disc. Both the HTPC near and the Samsung TV are using Wifi.
I can play a UHD BR ISO from my NAS over the HDMI out. But if I needed to play it over Wifi, that's twice the bandwidth. It could be up to 200 Mb/s. That's at the upper limit of what I can achieve at the 40 ft distance from the nearest wired Ubiquiti Wifi access point.
Edit: the TV does not show up as a DLNA target under MC.
My old TV does support DLNA, though, but I never used it. I moved it downstairs and it no longer has any device attached to it. I'll try to see if I can play videos from MC onto that TV over DLNA. One of my HTPCs was attached to this TV, but is now attached to the Samsung TV.
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