Devices > Video Cards, Monitors, Televisions, and Projectors

4k HDR colors are muted with 1030 video card

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curiousMonkey:
I am trying to get HDR content working with MC27 and my NVidia 1030 video card. Initially I noticed that my JVC projector was accepting an HDR stream and automatically enabling dynamic tone mapping. Unfortunately the colors looked muted to me and I discovered that the signal was described as 8-but RGB. My Bluray player sends a stream that is described as 12-bit YUV. Obviously a PC deals with RGB but somehow the information is not getting translated correctly.

I found this old thread that described the issue with MadVR:
https://yabb.jriver.com/interact/index.php/topic,125636.msg870371.html#msg870371

After switching my Windows desktop to 12-bit using the NVidia control panel, the projector reports that the stream is 12-bit RGB. Unfortunately the colors still look muted compared to the Bluray player.

What else am I missing?

tij:
If using madvr ... press ctrl+j while movie playing to bring MadVR info screen ... screen cap that and post it here

curiousMonkey:
I played around with the MadVR settings a little bit and now have two configurations with slightly different behavior.

1) The full color gamut seems to be passed through and looks very close to the Bluray. However the projector reports it as SDR.
   a) If I change the Windows Display setting to enable HDR, the image is received by the projector as HDR.
   b) This also forces the desktop to report some sort of pseudo HDR information and washes it out. In addition it forces the projector into high lamp mode all the time.

2) I changed the MadVR setting for the device HDR from "Let MadVR decide" to "pass HDR metadata".
   a) The projector detects this as HDR but I am back to the muted 12-bit colors with everything looking washed out.

I will attach two screen shots showing the MC output, labeled SDR and HDR.

tij:
Read this first to understand little bit on what HDR is and what involves in displaying it ... https://yabb.jriver.com/interact/index.php/topic,126153.0.html

You have to give more info for ppl to be able to help ... otherwise is just guess work ... at the moment all i know is you using Nvidia GTX1080, which is powerful enough not to cause any performance issues

1. What JVC projector you using? If it supports HDR, i would assume it support 4K ... yet your MadVR is scaling 4K resolution to HD (1920x1080)

2. Never use Windows HDR ... its rubbish for movie watching (at least on Windows 10 and lower) ... turn that off ... and let MadVR manage HDR switching

3. For each scenario you provided screen shots ... can you post screen cap of MadVR HDR settings

curiousMonkey:
The projector is a JVC NX7, it definitely has no problem with 4K HDR.
I started collecting the screen shot for MadVR but since there are a lot of screens that don't seem related to this issue, I only selected a few.
I think I did change the Quality Setting to Max (requires Medium range GPU) but I don't see that highlighted now.
Is there a specific setting that forces 4K resolution down to 2K?

The interesting thing is that now the MadVR output shows a 4K image and the HDR is correct.
I can't verify the desktop settings again because I have turned off the projector and I am accessing the Windows system via a VNC.
That seems to change the desktop from 4K resolution back to 2K for some reason.

Start by reviewing SettingsWorking file to see the latest MadVR output.

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