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2nd November 2018, 02:08 | #53521 | Link |
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For your SDR problem, have you tried BT.2020, DCI-P3, and BT.709 options to see if that oversaturated red gets controlled? I use a profile for BT.2020 and another for BT.709 for calibration. Also 8bit or auto instead of 10bit for SDR 8bit? I use an 8bit and a 10bit profile for properties.
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2nd November 2018, 03:26 | #53523 | Link | |
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2nd November 2018, 09:08 | #53524 | Link |
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What gamma are you using for HDR content? I tested so far a 3D LUT DCI-P3 with power gamma 2.2-2.4 with nice results. Now I tried a 3D LUT with madvr set to output in HDR format and ST2048 and JVC also on ST2048 and Guardians of the Galaxy looked fantastic. But when I looked at Iron Man 1 it was not watchable with it. Might be caused by just recalculating the 3D LUt instead of creating a new one with the JVC on ST2048 and HDR profile.
I was thinking I should go for: 1. A 3DLUT for 709 content with a gamma 2.2 or a bit higher using JVC 2020 profile since the calibration was made in DCI-P3 2. A 3DLUT for DCI-P3/BT2020 with gamma ST2048 using JVC HDR profile (which it would switch to automattically on my 7900) Does this makes sense? NoTechi Last edited by NoTechi; 2nd November 2018 at 09:12. |
2nd November 2018, 10:49 | #53525 | Link | |
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Hi mate, luckily yes that does work, ive been using it as a workaround for a good while now. I use BT2020 as BT709 still gives quite a red image. Like Huhn says though this shouldht be required which is the core problem, many thanks for your input though.
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2nd November 2018, 10:53 | #53526 | Link | |
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Hi, I find by calibrating for BT2020 resolves the issue completely for me and I dont need separate profiles for any other material, no other material seems affected by this for me which in itself is odd suggesting whatever is happening is happening towards the end of the processing chain maybe. its quite a bizzare problem but I guess its nice to know i'm not the only one who has it and not an issue with my own setup.
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2nd November 2018, 11:12 | #53527 | Link | |
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Just like 8-bit HDR or even 8-bit UHD, maybe BT.709 UHD is technically accepted by some displays but not following the standard and therefore not tested/considered by manufacturers?
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HTPC: Windows 10 22H2, MediaPortal 1, LAV Filters/ReClock/madVR. DVB-C TV, Panasonic GT60, Denon 2310, Core 2 Duo E7400 oc'd, GeForce 1050 Ti 536.40 Last edited by el Filou; 2nd November 2018 at 11:15. |
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2nd November 2018, 11:20 | #53528 | Link |
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Both exist and are valid. You'll probably find more BT.709 content still though. If you have a BT.2020/DCI-P3 capable screen with a decent color volume, I would probably calibrate for DCI-P3 (or even BT.2020) and let madVR change all content to that.
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2nd November 2018, 14:05 | #53529 | Link | |
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Hi,if this were the case you'd see this with NVIDA cards too though surely, I have no issues with my 1050 card, i've even tried two different HDR capable TVs
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2nd November 2018, 14:56 | #53530 | Link |
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Hmmm....the other day, when I connected my very old comp with ATI HD6570 to plasma, it reported xv.color color signal which is kind of like old wide gamut "standard" and I don't know how this happens, I never activated it if I can recall correctly...I haven't looked closer into this, and can't tell if I get wider gamut and more saturated colors because i didn't have time to look into how to deactivate this...I could connect it to my UHD over the weekend, but perhaps this could be a clue for you -> perhaps BT.2020 is signalled to TV without you knowing about it (like a sort of AMD-specific user friendliness)and TV switches to it's wide gamut mode (probably native colorspace)
Last edited by mytbyte; 2nd November 2018 at 15:01. |
2nd November 2018, 15:23 | #53531 | Link | |
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for an HDR signal it should assume bt 2020 or even better the connection should say bt 2020 and this API is broken for AMD. if amd is changing the HDMI color information based on bit deep and resolution alone than they are as dumb as they could be. GPU are mostly created for gaming and there is at least 1 game that can be rendered in 10 bit SDR and nearly every d3d11 game could do the same way before HDR or bt2020 was a thing so they are SDR and most important windows doesn't change its color space based on bit deep and resolution so if in doubt use the same as windows. than don't use sharpen complex. |
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2nd November 2018, 15:25 | #53532 | Link | |
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One other thing fixes this that I mentioned a while back but I didnt really look into my settings to hard to this might be a false positive, if I put my TV in PC mode this fixes it, could be something to do with that as well, perhaps the TV knows its a PC as is adjuting accordingly but as I have it in Bluray mode is showing the wrong colour space / saturation. There could be a difference between how a PC outputs 10 bit and how a bluray player does. its all very complicated, just glad i have a workaround for now
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LG OLED EF950-YAM RX-V685-RYZEN 3600 - 16GBRAM - WIN10 RX 5700 - https://www.videohelp.com/software/madVR/old-versions |
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2nd November 2018, 21:58 | #53533 | Link |
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(1) - sorry if this is a stupid question, (2) sorry if i've asked this before but why is there no profile group allowed for rendering, if this was possible it could solve a few issues, being able to turn DIRECT3D11 off for SDR material would be useful, perhaps being able to turn off FSE per media type might also be useful?
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LG OLED EF950-YAM RX-V685-RYZEN 3600 - 16GBRAM - WIN10 RX 5700 - https://www.videohelp.com/software/madVR/old-versions |
2nd November 2018, 22:48 | #53535 | Link |
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oh feck so you can, sorry.
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2nd November 2018, 22:52 | #53536 | Link |
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would it be true to say that the DIRECT3D11 option is only required for HDR 10bit playback and doesnt need to be on for any 8 bit SDR playback at all then?
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LG OLED EF950-YAM RX-V685-RYZEN 3600 - 16GBRAM - WIN10 RX 5700 - https://www.videohelp.com/software/madVR/old-versions |
3rd November 2018, 15:57 | #53538 | Link | |
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2. A 3D LUT is used to tone map in PQ using the projector's HDR mode. You would lose HDR -> SDR pixel shader, which I know you like. The 3D LUT could do a fine job, but it is a fixed curve for all videos and not dynamic like pixel shader. A 3D LUT for HDR content is not yet the reference, so choose the option with the best image quality. You could also try multiple 3D LUTs for different video peaks.
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HOW TO - Set up madVR for Kodi DSPlayer & External Media Players |
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3rd November 2018, 16:30 | #53539 | Link | |
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These measurements are used to do something similar to what Dolby Vision/HDR10+ do with regular HDR10 material? So madVR can make full use of a panel highlights capabilities on a scene by scene basis? |
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3rd November 2018, 16:45 | #53540 | Link |
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It reduces the compression applied by the tone mapping curve when possible by setting the curve for each scene. If you measure a file before playing it, it is possible to pick out scenes and the measurement tool will flag the brightness of the scene. Then the tone curve is set for each scene in the video. This has the most impact slightly above the set target nits.
Tone mapping goes under the PQ curve, which makes the image darker, and dynamic tone mapping attempts to dynamically reduce compression when possible.
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HOW TO - Set up madVR for Kodi DSPlayer & External Media Players |
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direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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