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5th December 2010, 20:00 | #4982 | Link | |
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I use Spline 4 with luma upscaling and downscaling
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MPC-HC/MPC-BE, Lav Filters, MadVR CPU: AMD Ryzen 5 1600, Video: AMD Radeon RX Vega 56 -> TCL S405 55", Audio: Audio-Technica M50S |
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5th December 2010, 20:17 | #4983 | Link | |
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luma: Lanzcos4 for downscaling / Lanczos3 for upscaling. Anything more rings like hell to my eyes. I use LSF for sharpening, much more efficient Last edited by leeperry; 5th December 2010 at 20:19. |
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5th December 2010, 20:36 | #4984 | Link | |
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What's LSF btw? Edit: NM, found what LSF was. I never have really gotten into Avisynth. I figured all those extra features are mostly pointless when you are watching digital sources (such as 720p or 1080p encoded XVID/X264 videos). http://forum.doom9.org/showthread.php?t=142706
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MPC-HC/MPC-BE, Lav Filters, MadVR CPU: AMD Ryzen 5 1600, Video: AMD Radeon RX Vega 56 -> TCL S405 55", Audio: Audio-Technica M50S Last edited by fairchild; 5th December 2010 at 20:52. |
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5th December 2010, 22:26 | #4985 | Link | |
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PS: yeah, spline gives more aliasing than lanczos from what mVR says. LSF is such a smart algorithm that it also sharpens up the motion blur...together w/ Reclock and mVR, it's a god send Last edited by leeperry; 5th December 2010 at 22:28. |
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5th December 2010, 23:21 | #4986 | Link |
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Spline @ 3 taps on all. You will not see ringing unless you're sources have not been encoded properly or you don't have the right setup and are sending madVR garbage. Calibration can also help with this issue as well. In addition, having the latest drivers and setting them up properly can prevent a lot of issues.
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5th December 2010, 23:56 | #4987 | Link |
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a question regarding bitdeph, at the front page its said that madvr supports 16-bit. but when I play HD videos on my LCD TV, then reclock (1.8.7.3) tells me 12-bit for video information. so is there some misconfiguration of my system?
radeon mobility HD 4850, catalyst 10.11,win xp prof, connected to TV via VGA-cable @1360x768, madvr 0.32, 3dlut use, video renderers and resampler of reclock bypassed. Last edited by Thunderbolt8; 5th December 2010 at 23:58. |
6th December 2010, 00:06 | #4988 | Link | |
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alright, more tests to go then! my displays are fully calibrated using a brand new i1d2, no worries..Color.HCFR and ARGYLL ftw PS: I upscale over my display native res in ffdshow, and then let mVR downscale in order to improve my Avisynth scripts accuracy...ffdshow only has "spline", you can't select the number of taps. PPS: indeed, spline upscale in ffdshow and then spline3 downscale in mVR looks better I think...less noisy and more details visible apparently Last edited by leeperry; 6th December 2010 at 01:54. |
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6th December 2010, 03:55 | #4990 | Link |
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It's hard to believe that an original->very_big->target can be any better than an original->target resize.
May be it can fool you but I think you loose some of the original information: Upscaling produces some interpolated (fake) informations. When you downscale it, you loose some informations of the big upscaled image. In an average situation, you have to loose some of the original information too (some interpolated fake information will remain while some original information will be lost). May be it helps to sharpen or soften the image. But I think you should choose the resize algorithm according to your taste (softer or sharper result) instead of this "trick". But this is only my theory. And, of course, you are free to do whatever you want... |
6th December 2010, 10:53 | #4991 | Link | |
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on LSF, it makes a pretty drastic improvement..LSF being plagued w/ jaggies at 1.0, and it's pretty sweet to have the last downscaling part done by the GPU got screenshot? I don't see how that's possible. Last edited by leeperry; 6th December 2010 at 10:56. |
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6th December 2010, 18:48 | #4992 | Link | ||
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From my extensive testing, Bicubic75 produces the best results when chroma detail is compared to luma. After that it is spline, but spline has an 'artificial' look to it due to everything being drawn as curves. For luma upscaling, I prefer SoftCubic50. Unlike most resampling algorithms this does not introduce much if any ringing into the picture, exaggerate noise or other compression artefacts, and keeps aliasing to a minimum. It is the closest result to what the source material looks like when viewed at native resolution on a good CRT. It seems like this would be a good starting point as well if you plan on doing additional sharpening processing on top. For luma downscaling I would use lanczos4. (or perhaps 8 but my system cannot handle it) Quote:
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6th December 2010, 19:25 | #4993 | Link |
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I like the idea of having the softest possible chroma + the sharpest luma...now, I might be willing to make compromises. I'm still undecided on spline luma up/down, but I like what I see so far...it still might look unnatural indeed.
madshi is always full of mysteries, but he recently said that maybe the most faithful to the source chroma wasn't the softest...need to chew on this, as he didn't seem too willing to back up this statement |
6th December 2010, 20:50 | #4994 | Link |
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Upscaling on video wiedth = display width
Hello,
I just noticed that madVR upscales videos if display width (1280px in my case) is the same as video width (1280px). Is there any need for upscaling in this kind of situation? @madshi: thank you very much for releasing madVR, it is the best video renderer I've ever used :-) Cheers airblaster |
7th December 2010, 02:00 | #4996 | Link |
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I can't decide what looks better to my eyes. I want image quality nirvana :
chroma upscaling= Bicubic 75 luma upscaling = SoftCubic 50 luma downscaling= Lanczos 4 or 8 or chroma upscaling= Spline 3 luma upscaling = Spline 3 luma downscaling= Spline 3 while using AviSynth LFS script (for both setups) LimitedSharpenFaster(ss_x=1.0,ss_y=1.0,strength=40)
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MPC-HC/MPC-BE, Lav Filters, MadVR CPU: AMD Ryzen 5 1600, Video: AMD Radeon RX Vega 56 -> TCL S405 55", Audio: Audio-Technica M50S Last edited by fairchild; 7th December 2010 at 02:09. |
7th December 2010, 03:11 | #4997 | Link |
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I've done a bit more testing, I still very much enjoy the softest chroma + sharpest luma combo...it gives the most stunning PQ to my eyes
upscaling in ffdshow: bicubic 0.0 for chroma, spline for luma in mVR: softcubic100 for chroma, spline3 for luma up/down I use CRT and DLP, no LCD.. |
7th December 2010, 06:27 | #4998 | Link | |
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Edit: @ Mangix: The video isn't upscaled but the chroma is upscampled. That's correct. That will happen with everything you feed to madVR since it does it's own internal conversions from YV12 4:2:2 -> RGB 4:4:4. @ ALL: please understand that madVR resizes essentially to what YOU tell it to. if you put it at full screen and the scenario that airbender mentioned above is your situation, eg. (1920 x something on a 1080p or 1920 x 1200 screen or a 1280 x something on a 720p screen) then it will NOT upscale anything. If you have altered the viewing window from full-screen for full resolution video or from the normal size of the video then it will upscale/downscale. very easy concept to understand, don't understand why some people aren't getting this and are getting confused. Last edited by dansrfe; 7th December 2010 at 15:58. |
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Tags |
direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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