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6th November 2020, 20:40 | #60621 | Link | |
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Quote:
Does that happen even after adjusting LG's new near black Gamma correction values ?
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6th November 2020, 21:04 | #60622 | Link |
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What are these new near black Gamma correction values?
They aren't going to change 10 bit v.s. 8 bit at all but it would be excellent to get better performance with full range RGB. I used Calman Video Pro to calibrate the TV so most of the calibration options in the UI are disabled but I do not see any new gamma correction options.
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7th November 2020, 01:44 | #60623 | Link | |
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Quote:
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7th November 2020, 02:03 | #60624 | Link |
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Ah, yes, there is a mode specifically for these TVs in Calman that uses a lot of near black steps. My i1d3 has trouble measuring the lowest step sometimes, even with near black read times turned way up.
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7th November 2020, 04:04 | #60625 | Link |
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Anybody know if there's a severe disadvantage to adjusting gamma in madVR (with the Gamma Processing dropdown) vs creating separate 3DLUTs for multiple targets? I like to switch between targets based on content or viewing conditions sometimes, and the dropdown is just a lot less fussy ...
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7th November 2020, 05:07 | #60626 | Link |
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No, that is a good use case for the gamma processing drop down.
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7th November 2020, 06:14 | #60628 | Link |
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make sure the loaded 3D LUT is 2.2 in this case so you will get the gamma you select not "something".
but this should be as accurate as creating a new 3D LUT with the same gamma. ignore bt 709/601 in there that seems to be a sRGB transfer function. if someone know what it really does feel free to tell us. |
7th November 2020, 06:53 | #60629 | Link | |
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I'd be wary of making any hard statements about what madVR is doing, but-- while there's no actual BT.709/601 electro-optical transfer function (gamma), the inverse of their optical-electrical transfer function is apparently quite similar to the sRGB EOTF/gamma. (You can even calibrate to this hypothetical curve in DisplayCAL if you really really really want to check this.) So that option resembling sRGB makes visual sense, even if exactly what's being done under the hood is unclear. |
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7th November 2020, 13:51 | #60630 | Link |
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I guess if Smart Access Memory will provide any performance enhancement depends on whether you're using software/copyback or native decoding, as decoded frames is the only thing that uses a lot of bandwidth between CPU and GPU in madVR. It's not clear how much devs need to add manual optimisations, AMD said you should get some benefits automatically. But if this needs manual optimisations to get the most out of it, maybe LAV is where the changes are needed and not madVR itself.
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7th November 2020, 15:57 | #60631 | Link |
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i don't except much from smart access video player.
currently you can address close to 256 mb at a time that's bigger then a 8K 16 bit image and i just assume it's fine to send each frame individual because if you have one ready send it i guess? does this mean it will not add anything obviously not they are assumes. |
8th November 2020, 16:36 | #60632 | Link |
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Guys, I would appreciate very much if someone could answer these questions regarding HDR reproduction, as this is a very big thread:
When using madVR's tonemapping (pixel shader), what is recommended to adjust on the TV side? Should I set it to full brightness - backlight full, contrast 100 etc - and gamma 2.2 (which I believe "hdr mode" fixes to on LG OLEDs) Also, should I change the TV's color gamut to extended/wide etc, or Auto is enough for it to correctly display colors when using madvr's hdr-to-sdr tonemapping? Thanks! |
8th November 2020, 19:55 | #60633 | Link |
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You can use the tone mapping, but you should enable HDR in madVR and set nits to 700. Leave everything as it is on the TV (100, 100, 50, AUTO). Make sure Dynamic Contrast/Tone-mapping (whatever it's called on newer models) is off.
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Henry | LG OLED65C7P | Denon AVR-X3500H | ELAC Uni-Fi x7 | ELAC Debut 2.0 SUB3030 x2 | NVIDIA SHIELD TV Pro 2019 | Plex Last edited by VBB; 8th November 2020 at 19:58. |
8th November 2020, 21:59 | #60634 | Link | |
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But I also have a Sony X900F. How would you suggest me to set it if not passing HDR signal trough? My PC is kind of bugging and hdr signal passthough is a lottery. sometimes it will just dull the entire picture. |
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8th November 2020, 22:30 | #60635 | Link |
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I would do the same for the Sony, which can get a little brighter than the OLED. So, maybe set nits at 800 or higher. HDR to SDR tone-mapping is really meant for projectors.
If your HDR picture is dull, that could be due to the current Nvidia drivers. Once you go full screen without any OSD/GUI, it should be fine.
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Henry | LG OLED65C7P | Denon AVR-X3500H | ELAC Uni-Fi x7 | ELAC Debut 2.0 SUB3030 x2 | NVIDIA SHIELD TV Pro 2019 | Plex |
9th November 2020, 00:18 | #60636 | Link | |
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So, when using madvr with televisions, we should still send the hdr metadata to put the tv in the appropriate brightness/gamma/color gamut mode? And since we are limiting the nits, the TV wont apply significant double-tonemapping? Thanks once again |
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9th November 2020, 00:23 | #60637 | Link |
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That's the point, yes. You want to make the best use of your HDR-capable display.
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9th November 2020, 05:26 | #60638 | Link |
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Optimus options disappeared from Windows 10 and MadVR/LAV
Recently an Intel update ran that I think is responsible for breaking the Optimus (Nvidia+Intel selection for which video card to use with which program) in Windows 10. I can't launch Nvidia Control Panel (its missing from the right click selection on the desktop), and clicking on it in Windows Control Panel does nothing. Has anyone else with an Optimus system encountered this issue? If so, did you find a solution and what is it (are there particular driver versions for both Intel and Nvidia that are recommended?). Anyone find a different way to control which GPU is used to run specific programs. I wouldn't mind primarily using the Nvidia for most tasks, but I suspect some things are tied directly to the Intel GPU (like the HDMI) so not everything could be run through the Nvidia GPU if there was even a way to do so. I'm hoping there is still a way to get MPC and MadVR to play my videos using my Nvidia Geforce GTX 680M instead of the much weaker Intel HD graphics 4000 that can't handle mid to high level scaling, rendering, and processing settings that the Nvidia does.
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9th November 2020, 10:16 | #60640 | Link | ||
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On the B8 DV is even better than HDR10. Quote:
Normally you have to measure what nits your TV is capable of (B8 is around 700), or take values from rtings. The issue is that LG needs proper metadata sent, that certain driver versions can screw up (even with nvidia). LG needs BT.2020 with HDR10, DV is a complete black box You can take a look the the link in my signature for madvr config.
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direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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