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23rd April 2018, 18:41 | #50341 | Link | |
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So if I was doing peak=100 diffuseWhite=40 before, my new peak=250? Thanks for all you do madshi. Cheers, -donger |
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24th April 2018, 01:55 | #50342 | Link |
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Target peak nits
What should I enter for "Target peak nits" when converting HDR to SDR?
I have a JVC DLA-RS400, 126" screen, 170 lamp hours, dark room. According to webprojectorcalculator.com I have: 79 nits in low lamp mode 106 nits in high lamp mode I'm using the latest madvr version. Edit: Also, my projector has not been calibrated (except basic gray scale by eye) but is set to BT.2020 color space. Nevertheless, should I set madvr to calibrated to BT.2020, or DCI-P3, and power curve 2.40? I tried DCI-P3 but the colours went too red, BT.2020 with 2.40 appears to look very good, as does my current peak nits of 100 - if I up the peak nits, it just appears to produce increasing black crush AND somewhat over exposed whites. I have manual iris fully open and auto iris on 2 (which apparently is more graduated that the other more contrasty setting) Last edited by MrDVader; 24th April 2018 at 02:08. |
24th April 2018, 09:57 | #50343 | Link | |
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Seriously though, HDR processing is not very uniform right now so we would need experiance with your projector and a meter to be sure. That said, the HDR output should probably be set to BT.2020 as you found. Almost everything HDR is encoded in the very wide BT.2020 color space so I think most displays do better mapping when receiving BT.2020. Gamma is very much user preference and madVR's settings only have an effect when using madVR to change the gamma.
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madVR options explained |
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24th April 2018, 12:47 | #50344 | Link |
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I wonder whether Mr. madshi has a plan to integrate the Open GL renderer with madvr .When I play 4K HDR movies in Open GL rendering mode,i can get better image quality in open gl mode than i do in D3D11 rendering mode of Madvr.Better color images at least.I look up the parameters in the format in Open GL mode of potplayer.
The orders is :NV12(INPUT)-->RGBA(video)-->XRGB(backbuffer-->display).Due to RGBA(video) conversion,my TV set displays lifelike color images.Unfortunately,there is no 60fps feature to be available as the Open GL rendering mode of potplayer runs. So i hope Mr. madshi integrate the Open GL renderer in madvr . Thanks in advance,Mr.madshi |
24th April 2018, 15:56 | #50345 | Link | |
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HOW TO - Set up madVR for Kodi DSPlayer & External Media Players |
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24th April 2018, 15:58 | #50346 | Link | |
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HOW TO - Set up madVR for Kodi DSPlayer & External Media Players |
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24th April 2018, 16:11 | #50347 | Link |
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OpenGL or D3D do not have an impact on the image quality - it all depends on the algorithms you use to process the image. I'm not madshi, but I think I can safely state that madVR will never use OpenGL.
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LAV Filters - open source ffmpeg based media splitter and decoders |
24th April 2018, 17:18 | #50348 | Link | |
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24th April 2018, 17:42 | #50349 | Link |
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Something is wrong then. I have an i1 Pro 2 and i1 Display Pro which I regularly use to measure the color generated by madVR. madVR is very accurate and able to perfectly display any in gamut color. I have never used PotPlayer but it seems obvious that it is doing some saturation enhancement or something.
As nevairiel said, any differences are due to processing, not the API used to get the video into the GPU.
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madVR options explained |
24th April 2018, 18:04 | #50350 | Link |
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I am fairly certain OpenGL is limited to 8-bit processing. At least, it is on Linux. Kodi has been waiting for updates to support 10-bit passthrough. The rest of the processing likely comes down to the algorithms chosen. The poster noted the input is also converted to sRGB, like Kodi, so maybe this is also standard or the preferred method of rendering in OpenGL.
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HOW TO - Set up madVR for Kodi DSPlayer & External Media Players |
24th April 2018, 20:44 | #50351 | Link | |
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openGL is not limited to 8 bit processing it's 32 bit: https://www.khronos.org/opengl/wiki/Image_Format
but as always these open standarts are to open same counts for vulkan: Quote:
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24th April 2018, 21:44 | #50352 | Link |
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Ok, so I don't know what technological limitations are limiting rendering in Kodi.
I have nothing against Kodi. I just think its video rendering needs to be updated to keep up with the times. I thought OpenGL standards were to blame.
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HOW TO - Set up madVR for Kodi DSPlayer & External Media Players |
24th April 2018, 21:52 | #50353 | Link |
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Hi guys, recently took off the lazy hat and setup 3dlut through display cal
How do I verify the output with madvr// madtpg ? The profile is installed into madvr and as far as I can tell, the color correction is working when videos play but I don't see a test tab anywhere.
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24th April 2018, 22:25 | #50354 | Link |
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I like ColorHCFR. Simply measure your color space with the 3DLUT enabled in madTPG.
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madVR options explained Last edited by Asmodian; 25th April 2018 at 06:39. |
25th April 2018, 00:37 | #50355 | Link | |
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You're better off using madVR to get the picture you want, rather than relying on a renderer that's clearly deviating from the original image by default. |
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25th April 2018, 00:47 | #50356 | Link | |
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To be honest I'm not good at the technologies about video, processing algorithms,renderer and so on.I only use potplayer to play 4K HDR or 1080p movies on my TV set. BY the way,Could you build any ***.zip instead of ***.exe in nightly version about LAV files? |
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25th April 2018, 00:57 | #50357 | Link | |
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25th April 2018, 07:15 | #50359 | Link |
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But there is also to say that no TV or vpr, currently, sufficiently covers the color space BT.2020 (for example my vpr OPTOMA UHZ65 covers it at 56%), while there are some displays that cover the DCI-P3 to 100% .... then also in Madvr in the information says "BT.2020> DCI-P3", so "in this dispalay is already calibrated" would not it be fair to use DCI-P3?
Last edited by stefanelli73; 25th April 2018 at 07:17. |
25th April 2018, 07:30 | #50360 | Link |
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3D APIs are just different ways to the same goal: Graphic card internal features. DirectX under Windows is a more direct way there (and there may be even shorter paths), OpenGL under Windows rather a detour in comparison. The advantage of OpenGL is portability across different operating systems; that's not important for a DirectShow renderer which will work only under Windows anyway.
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direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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