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8th January 2019, 22:00 | #54161 | Link |
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O.k. I have read a fair bit and you guys (and gals) seem to know what you are talking about.
I have a 1080ti and sending the image to a JVC projector that is 4k capable. My questions are: I am using 'tone map HDR using pixel shaders'. Would ticking 'measure each frame's peak luminance' be the correct thing to do? Also, where do I check the DXVA scaling/decoding? Is it in LAV filters? Thanks |
8th January 2019, 22:04 | #54162 | Link |
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Quite true. That's where the compromises come into play if you're on a performance limited card, however. Do you lean more toward the HDR processing (I am right now) or toward chroma upscaling? It really depends on what you've got under the hood and the content you're trying to watch. And that's also where profiles can come into play. Something I've still not delved into myself yet but really should soon. Cause you can crank up chroma upscaling if you're e.g. scaling a blu-ray to UHD resolution and sacrifice chrome upscaling to save performance for HDR tonemapping when watching UHD content. That's just one example, but, you get the idea.
At the moment I'm fighting with my 1060, AVR, and TV to get my picture to not be cut off. I tried activating scaling in the nVidia control panel but it kills HDR as soon as I enable it. So I'm stuck with native res that's now for whatever reason getting cut off on the TV. I really can't win. LOL
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8th January 2019, 22:26 | #54163 | Link | ||||
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For full HD content on my 1080 I do a 2x supersample with NGU sharp and downscale with SSIM 2D, it's demanding as hell but because I have no other sharpening on my set or with madVR the resulting picture is very nice.. the edges are sharp and the picture does not look sharpened at all and the whole thing has a very high res sort of pop to it. For hand drawn animated content I don't do this because the detail isn't there (most anime is actually captured at 720P, so much of it is upscaled anyway) and I've tested what I gain from supersampling this and it's next to nothing.. You got to know where to invest those resources. From the 750ti->960->1060 6GB-> 1080 it's been a balancing act I think I've managed particularly well, not a lot has changed when it comes to non HDR content upscaling/processing. Quote:
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You may wish to select the chroma DXVA options in 'Trade quality for performance' if you want the best performance from your card at the expense of image quality, evaluate for yourself. Last edited by ryrynz; 8th January 2019 at 22:43. |
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8th January 2019, 23:24 | #54164 | Link | |
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Thanks for the help so far. |
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9th January 2019, 00:14 | #54165 | Link | ||
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9th January 2019, 00:16 | #54166 | Link |
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Unless you NEED copy back for whatever reason (black bar detection, deinterlacing, etc), I would personally recommend D3D11. It's what I've been using for a long time now and it works very well.
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9th January 2019, 00:17 | #54168 | Link |
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Definitely D3D11 Native with pixel shader tone mapping.
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9th January 2019, 01:16 | #54169 | Link | |
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However, my basement ATI 7870xt isn't showing the measure screen nit and the highlight restoration seems to have no effect.. is it not hooking into the old gpu's direct compute ?
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9th January 2019, 02:15 | #54170 | Link | |
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Have you tried exclusive mode? Does your TV really not have any mode with no overscan, even an hidden one like in a service menu or something?
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9th January 2019, 04:55 | #54171 | Link | |
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I tried exclusive mode but it made no difference. My TV is pretty old (Mitsubishi LaserView, purchased in '08) and doesn't have many options. The video format options it does has are more for people dealing with black borders or 4:3 content. And I only have slight (1 or 2 letters cutoff on the madvr ODR) overscan on all 4 sides. Not really noticeable when I'm watching something but enough to make navigating Windows fun. |
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9th January 2019, 05:23 | #54172 | Link | |
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@glc650 look into the AMD driver for something similar to adjust desktop size and position that nvidia has. this option is creating a smaller moved image not by scaling it down like an underscan but by creating a new resolution so everything stays bit perfect on the PC side which is preferable worth a shoot my fix the presentation issue. what type of windows version are you running and can you make a screen of your OSD. forced over scan is sadly a not unusually for older screens. |
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9th January 2019, 10:00 | #54173 | Link | |
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edit: enabling the option in CCC made it available in Radeon Settings (see pic) https://1drv.ms/u/s!AnsGKXR_EKR0hCYcEtxKSYFM0GeS Last edited by glc650; 9th January 2019 at 10:10. |
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9th January 2019, 13:40 | #54174 | Link |
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I seem to be going backwards some days with the HDR side.
What seems to be the most constant nVidia drivers for toggling HDR ? It seems it all depends on which way the wind is blowing, I did have no issues, but now it does toggle with no TV indication and I have to re-select the input on my TV for it to actually display ? I have tried various drivers, some work, then stop, I think the hard part is its mostly indications on my TV I am having issues with as it does look to go to HDR as such, as when I reslect the TV input and the HDR Signal comes on the screen, nothing changes apart from the feedback I get from the TV on colour space. |
9th January 2019, 14:00 | #54175 | Link | |
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you didn't say what windows version this is but you seem to have 2 displays and this can create a lot of presentation glitches. |
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9th January 2019, 14:42 | #54176 | Link | |
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This is the first time an AMD driver makes some trouble, on Nvidia side I had already more than 5 times trouble with driver. @all: Do you think a dedicated thread for driver versions and its issues of AMD/Intel and Nvidia would be a nice idea? Then you don't have to look up one specific post of this monster thread. |
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9th January 2019, 14:48 | #54177 | Link |
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If you wanted to maintain a thread on driver versions, go ahead. You would likely get few reports to verify if the reports are true or false for everyone.
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9th January 2019, 16:08 | #54179 | Link |
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4K HDR pixel shader, gamma settings
I remember that madshi said that 4K HDR pixel shader internally uses 2.2 gamma. Is there any "hard" rule what gamma (2.2/2.4/bt1886/etc) should be used in the actual device? Or is it like with SDR content?
Btw, here's the current state of madVR in this regard: image comparison
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9th January 2019, 16:21 | #54180 | Link |
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the brightness level of the none compressed parts match at gamma 2.2.
so if you want the correct brightness levels you set this screen is already calibrated to your screens response where unlike SDR madVR will automatic change your "gamma" for HDR sources to 2.2. as i said before i'm not a friend of this inconsistent behaviour between HDR and SDR. |
Tags |
direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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