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[darichman]

Hi team

I have recently built a new PC, including a Samsung Odyssey G9 49inch curved monitor (which is totally awesome btw!). The desktop resolution is 5120x1440.

I notice a consistent and reproducible issue when playing high quality video rips (eg an example file is a 52.7Gb  3940x2160 10-bit Bluray rip in MKV format). My MC video settings are set to Red October HQ with hardware acceleration. It's a pretty high-specced system, so I didn't think I'd have issues, but when I open these video files in fullscreen I have had two issues:

• 1. the whole screen dims, including the MC play header, volume bar etc
• 2. colour is washed out, Like all the colours are there but really subdued and lacking vibrancy
• 3. when I stop playback and open any other standard video file (which would usually play fine without the above issues) the colours are now garbled... like bright reds and purples with otherwise normal audio, seeking etc
• 4. If I close down MC and reopen, standard quality video files play fine again, but above issues recur when playing any higher quality 4k+ file per above

If I change to Red October standard, issue 1 goes away, but issue 2 still occurs.
Opening same files in any other windows default player plays them fine.
I tried to troubleshoot, and have managed to fix issue 2. by forcing the Nvideo display to full dynamic range/colour, but the dimming issue and then funky colours with other files still persists after the dimming issue occurs.

System specs and a benchmark copied below. I could just run in Red October Standard, but feel the system should be able to cope with anything I can throw at it!

Thanks for any advice

MB: Asus ROG Maximus XII Extreme LGA 1200 E-ATX Intel Z490
CPU: Intel Core i9 10900K 10 Core LGA 1200 3.70GHz CPU Processor
Graphics: Asus ROG Strix GeForce RTX 3080 Ti OC Gaming 12G Graphics Card
RAM: Corsair 128GB (4x32GB) Vengeance RGB PRO 3200MHz DDR4
Windows 11 pro 64-bit (although happened on Windows 10 too)

=== Running Benchmarks (please do not interrupt) ===

Running 'Math' benchmark...
    Single-threaded integer math... 3.136 seconds
    Single-threaded floating point math... 2.142 seconds
    Multi-threaded integer math... 0.395 seconds
    Multi-threaded mixed math... 0.270 seconds
Score: 3197

Running 'Image' benchmark...
    Image creation / destruction... 0.228 seconds
    Flood filling... 0.235 seconds
    Direct copying... 0.383 seconds
    Small renders... 0.714 seconds
    Bilinear rendering... 0.303 seconds
    Bicubic rendering... 1.191 seconds
Score: 7205

Running 'Database' benchmark...
    Create database... 0.078 seconds
    Populate database... 0.719 seconds
    Save database... 0.093 seconds
    Reload database... 0.065 seconds
    Search database... 0.981 seconds
    Sort database... 0.730 seconds
    Group database... 0.709 seconds
Score: 6370

JRMark (version 28.0.66 64 bit): 5591

[Hendrik]

Colors being washed out means that HDR is not actually being processed, which would be normal for ROStd, but if it also happens with ROHQ, it would seem to indicate that your screen somehow claims to support HDR, but doesn't actually process it.

In ROHQ settings, under devices, you can set HDR to be tonemapped to SDR, that should resolve all the issues, since HDR output seems to be broken.

[darichman]

Thanks very much Hendrik - I will defer to you in all matters video. Will try tonight.

[darichman]

So, the monitor does support HDR, but for some reason HDR is not enabled in Windows 10 by default! All working as expected. Thanks again