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24th August 2019, 11:25 | #57201 | Link |
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Sorry, clearly I've lost the plot, as there I was thinking we were discussing HDR playback on a 4K TV that would, one way or another, by default have to support 10bit - my bad...
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24th August 2019, 12:07 | #57202 | Link |
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The TV supports 10-bit input but of course not with RGB at 60 Hz so you either have to send YCC 4:2:2 10-bit or RGB 8-bit. If you output YCC 4:2:2 obviously you lose chroma precision, but you also risk the graphics driver using lower quality conversion so many people using madVR prefer sending 8-bit RGB even with HDR, but as AMD insists on 10-bit for its HDR API it's the graphics driver that is doing the 10- to 8-bit dithering for output, and it would be better if madVR was doing it.
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24th August 2019, 12:18 | #57203 | Link |
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Makes perfect sense, from a technical point, but given all UHD HDR movies are 23p or 24p (apart from a few), why is it an issue? I guess thats what I am failing to understand.
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LG OLED55BX6LB, Zidoo Z1000 Pro, Yamaha RX-A3060, Polk Signature Fronts & Centre, Wharfedale D300 Atmos surrounds, Polk Signature HTS 10 Sub, DSPeaker Antimode 8033 Cinema Last edited by oldpainlesskodi; 24th August 2019 at 12:22. |
24th August 2019, 13:03 | #57205 | Link |
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Little help guys. Amd card, oled c8. When I manually switch hdr in win10 (madvr set to choose), everything is ok (pic 1). If i want hdr passthrough by choosing d3d11 10bit, hdr passthrough, display shows hdr tag but blacks are crushed (pic 2). On hdmi front everything is set to full (0-255). Any ideas?
pic1 pic2 |
24th August 2019, 13:18 | #57206 | Link |
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HDR may invoke a diffrerent preset for HDR, you may not have configured your black level, if your black level is set to "LOW", try changing it to HIGH.
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24th August 2019, 13:45 | #57207 | Link |
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Thats the thing. OS HDR works as intended, AMD HDR is crushed. On tv (hdr settings) and gpu its on high, full, also madvr and lan video decoder. Dont know where else to set it.
p.s. Basicly it seems d3d11 is to blame, but dont know what i can do about it. Last edited by mgermo; 24th August 2019 at 14:23. |
24th August 2019, 18:08 | #57209 | Link |
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Both, core is very important but a memory overclock has a big impact too.
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24th August 2019, 18:48 | #57211 | Link | |
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Quote:
Mine: windows - 444 full RGB 8 bit MADVR - 0-255 / 10 bit / FSE & use DIRECT3D ticked - LG OLED EF950v TV - black level - high - brightness 50 / gamma 2.2
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24th August 2019, 19:33 | #57212 | Link | |
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Quote:
He might be using a displayport to Hdmi2.0 converter. These often cause gamma crush on TVs.
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24th August 2019, 19:39 | #57213 | Link | |
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Quote:
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HOW TO-Kodi 2D-3D-UHD (4k) HDR Guide Internal & External Players W11 Pro 24H2 GTX960-4GB RGB 4:4:4 @Matched Refresh Rates 8,10,12bit KODI 22 MPC-HC/BE 82" Q90R Denon S720W |
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24th August 2019, 20:19 | #57214 | Link |
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I have same settings. Windows default is 12bit, changed to 8bit for testing, no difference.
Discovered that you dont need to have hdr passthrough enabled, even if you have it on let madvr decide it decides on hdr mode (if you have d3d). And you dont need 10bit, if you put it on auto it goes to 10bit anyway. Unfortunately picture ramains way too dark aka i cant see anything (probably more than just black crush). If you need any more info... p.s. Before I was on old 19.2 drivers, updated to new 19.8.1, same difference. p.s.2. No hdmi-displayport converters |
24th August 2019, 20:23 | #57215 | Link |
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With AMD you have to send it 10 bit data or you cannot enable HDR. It is less than ideal.
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24th August 2019, 23:36 | #57217 | Link |
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So my 5700 went back to Best Buy today. I'm using my RX 560 until the non-reference 5700 XT's become available. I just got a new receiver and I'm having issues passing through 4k @ 60Hz, so I've got that mess to keep me busy until then.
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25th August 2019, 05:22 | #57218 | Link | |
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Quote:
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25th August 2019, 05:23 | #57219 | Link | |
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Quote:
12bit 23.976hz 444 no more fiddling. It's just easier.
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Tags |
direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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