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30th September 2018, 17:32 | #52863 | Link |
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jerry, the newest OLEDs top out at about 800nits, or something like that. Definitely very far away from 10000nits. I can't really tell you which settings are the best. I can only advise to try different "target peak nits" values, in combination with "output video in HDR format" either on or off. And then use the settings combination that looks best to your eyes.
The other options are less important. The "measure each frame's peak luminance" and "highlight recovery strength" options can help sometimes, so they might be worth trying. You can leave the other options (tone mapping curve & color tweaks) at default. |
30th September 2018, 17:34 | #52864 | Link | |
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First, no OLED is reaching 10000 nits. That's the theoretical unicorn screen. No consumer device comes even remotely close. OLED, particularly LG OLED can MAYBE hit 800-850 max depending on how it's set up. This is why most of us with an LG OLED tend to run around the 700-800 target nit range. The theory being that if you're setting a target higher than the display is capable of, it is going to trigger the TV's internal tone mapping (CAVEAT: It probably is regardless, but, we're trying to get as close with the target nit as possible to the TV max nit...whether tone mapping is always done or not in HDR mode is something we're still working on figuring out). So, there's no easy answer to your questions, unfortunately. Trial and error are what it's going to take to determine what looks best to you. If you're on an LG OLED, I'd probably stay below 850 as my target nit. I've been using 800 lately and think that's probably a bit too high.
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30th September 2018, 17:36 | #52865 | Link | |
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30th September 2018, 17:50 | #52867 | Link |
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@madshi thanks for the prompt reply! I have seen some comparison pictures with "highlight recovery strength" in hdr to sdr conversion and I assume it works pretty much the same when outputting in hdr format, and I think it definitely looks better with this on so I will use this and maybe keep it at low or medium. Maybe I should try with 750 nit next time and see how does it differ from passthrough. Though, at first glance it seems to me that the resulting image in passthrough is brighter than when I set this to 1000, doesn't that mean the screen can actually go over 1000 nits? Though it might just have been the wrong tone mapping by the TV that made the whole area a bit more bright so I though it was " brighter", I can't say for sure yet
@SamuriHL may I ask what result did you get that makes you think 800 is "too high"? Maybe I can use the same criteria to better adjust my setting Thanks! |
30th September 2018, 17:58 | #52868 | Link |
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@madshi
I reduce physical resolution of TV set so that i can play fluently HDR movies with highlight recovery algorithm by choosing high option.When i set bright peak nits to 100,the dynamic images effects look obviously brighter than it does in passthrough mode.As it is 200 nits,dynamic images effects get close to passthrough.While choosing more than 600 nits,the effects seem undifferentiated with passthrough. |
30th September 2018, 18:03 | #52869 | Link |
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I want to be clear, at 800 it looks fantastic. My reasoning for saying that it may be too high is that I don't know the max nit level for my specific TV. I have no way to measure it. My goal is to keep the target nit under the max nit that my TV is capable of in an effort to minimize my TV's internal tone mapping. It's very likely that it's tone mapping regardless, but, if madvr does its job at the theoretical max limit for my TV, I'm HOPING that whatever the TV does internally doesn't mess with it too much. As from my experience so far, that seems to be the case. At 800, I can see a NOTICEABLE improvement over pass-through. Hope this makes sense.
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30th September 2018, 18:11 | #52870 | Link |
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@SamuriHL Thanks! I'll test this again a few times to see what works better then.
@madshi may I also ask does "measure each frame's peak luminance" works kinda like sending dynamic data to the TV, if it's just about how the result looks? Like the tone mapping could be tuned according to what is needed for each frame? |
30th September 2018, 19:24 | #52871 | Link | |
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About Defeating TV's internal tone mapping, i've measured my LG OLED HDR peak arround 394nits so i've set madvr target nit to 400nits for HDR Processing and while comparing it to HDR>SDR i couldn't see any loss of details while enjoying the luminance boost of HDR mode. Hope madshi can implement his idea of outputing maxCLL based on selected target nits in the next official or test release. Thanks for making my TV HDR mode usefull again
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30th September 2018, 19:46 | #52872 | Link | |
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30th September 2018, 20:11 | #52873 | Link |
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I've tried to insert those custom resolution values madVR calculated (first picture) into the CRU tool which you can see in picture 2.
Why is the horizontal front porch not accepted by CRU? It's red and the OK button is greyed out. It looks like madVR and the GPU driver doesn't have any problem with that front porch value. There wasn't any error message obviously. |
30th September 2018, 20:57 | #52874 | Link |
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I've not done a WHOLE lot of testing yet, but, in the testing I did yesterday I've found that I get better results with the LG dynamic HDR turned ON. I suspect that's because it's looking at each frame and madvr's output is probably close to what it would change. I don't really know and this is just a guess. But to me, it definitely looks better with the dynamic HDR turned on.
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30th September 2018, 21:17 | #52875 | Link |
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Yeah I've found Active HDR to be very effective so I wouldn't want to lose that in order to use MadVR's tone mapping. I'll be honest though, I've gone backwards and forwards between MadVR tone mapping at 700nits (with highlight recovery set to medium...I have no idea what this should be set to), and straight passthru, and I can't see any difference...ok MadVR tone mapping is ever so slightly darker (I guess I can increase target nits to make brighter) but aside from that almost imperceivable difference it looks the same. What are the benefits of MadVR tone mapping vs letting the TV do it (LG C7)
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30th September 2018, 22:01 | #52876 | Link |
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If you're going to tone map while in HDR mode, medium highlight recovery is probably not strong enough. Try the Are you nuts?! setting and see if that makes a difference for you. The tone mapping option was originally designed (I believe) with projectors in mind that don't necessarily have native HDR capability. The idea would be to tone map HDR to SDR. On OLED, we have trouble getting high enough brightness in SDR mode so we have to try to see if it works for us in HDR mode if we want to keep the brightness. If the difference in the TV's tone mapping vs madvr isn't perceptible to you there may not be a benefit in using the option. Try 800 nits and see what you think with a stronger highlight recovery. Also know that this is a work in progress and that it's being worked on by madshi between each version. So this option will get better with time. I already prefer it with my setup to pass-through as I can definitely see a difference.
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HTPC: Windows 11, AMD 5900X, RTX 3080, Pioneer Elite VSX-LX303, LG G2 77" OLED Last edited by SamuriHL; 30th September 2018 at 22:03. |
30th September 2018, 22:51 | #52879 | Link | ||||||
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SDR is supposed to have peak white at around 100-200nits. Which is easy for OLED. |
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1st October 2018, 01:11 | #52880 | Link |
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Well, AMD may be a piece junk for you but in my set up I have perfect 4K and 3D playback with RX-460 on Windows 10.I am using 18.5.1 driver and have not updated to new drivers as I am not having any issues. May I ask what issues you are having or had with AMD? If you are having issues, then I am 100% sure it's your own setup related, and AMD has got nothing to do with it. I am a proud user of AMD for years and it definitely isn't a piece of junk.
Last edited by alps006; 1st October 2018 at 01:40. |
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direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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