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24th February 2019, 15:31 | #54961 | Link |
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cropping doesn't change the AR.
so crop both sides will result in scaling if not you will not scale. if you setup your player to deform your image it will "always" scale. if your source file doesn't match your device AR use an profile. |
24th February 2019, 15:38 | #54962 | Link | |
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For example. If I got a 2.x : 1 movie. It's got both vertical and horizontal bars. But the Vertical bars are only 2-3 pixels wide I definitely want to crop the Normal Big Horizontal bars. This allows for Pushing NGU Luma to Very High vs High. That's good. Render time 35ms But now if the Detection works on the Vertical Bars again, it will add Lanczos Ontop of NGU VH, pushing render time to 40+ms.
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24th February 2019, 16:11 | #54964 | Link |
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Here's what happening
the 1080 is going to 816, Want the 1920 is going to 1918, Do not Want, adds Lanczos ontop of NGU(vh) The scaling option you recommended doesn't seem to impact this. https://imgur.com/a/v2m18bc
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24th February 2019, 16:18 | #54965 | Link |
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There is an option to ignore small changes by X pixel, did you enable that?
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24th February 2019, 16:46 | #54970 | Link | |
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My TV has judder problems by nature,so it's useful I guess. Never done an A B,just use it since introduced and can't see anything wrong.I am used to the ''blur'' it seems and find it normal. Thank you. |
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24th February 2019, 16:57 | #54971 | Link | |
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Because if we're to assume NGU already produces the best image, Why would we want Another Scaling layer Lanczos ontop of that JUST to get rid of a 2 pixel vertical bar ? That is to say, the bestest bacon of the madvr system is NGU, so we're moving all our eggs to optimize performance for this feature. The lanczos cutting 2pixel vertical bar is good, but it's like kale, yea it's healthy, but we showed up at the picnic for bacon. ?
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Ghetto | 2500k 5Ghz Last edited by tp4tissue; 24th February 2019 at 17:09. |
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24th February 2019, 18:27 | #54972 | Link | |
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24th February 2019, 19:02 | #54973 | Link |
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Just tested some more movies. Surprisingly QUITE MANY will cause the blackbar detection to crop 1920 down to 1919 or 1918 which causes the subsequent 2nd phase upscaling to kick in.. After NGU already upscales..
Darn tootn' NGU (High) -> Lanczos AR the disable scaling option doesn't work.
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Ghetto | 2500k 5Ghz Last edited by tp4tissue; 24th February 2019 at 19:20. |
25th February 2019, 19:37 | #54975 | Link | |
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I'd even say the setting would be best if it could be specified as a ‰age of the picture dimensions instead of number of lines, that way you could just get rid of the "disable scaling if image changes by <x> lines only" (although I doubt UHD sources still have small vertical black bars, but you never know).
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25th February 2019, 21:58 | #54976 | Link |
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I think pixel lines would still be best for the option, I would even like it if was the same "disable scaling if image size changes by only" option but applied to post doubling scaling as well. It could also be relative to the screen itself, the number of extra black lines allowed on the display before scaling activates, and do the check at each instance of image scaling (e.g. before lanczos scaling after doubling). Anamorphic is a little more complicated but I would prefer to not check this until after fixing the aspect ratio.
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26th February 2019, 02:37 | #54977 | Link | |
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So, I think disabling Vertical check is best, because with horizontal we almost always have room to safely crop, whereas with vertical it could be risky. I tried another file today, the detection cropped 3840x2160 to 3878, but because it was not doing NGU double, the Ignore scaling function did work in this case. It's the 1920x1080 crops which cause issues when ngu to 3840.
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26th February 2019, 04:06 | #54978 | Link |
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It's not "because it was not doing NGU double", it's simply because it didn't have to scale at all as instructed by the setting in question. It compared 3838 or 3828 or whatever (3878 was a typo, right?) to 3840 and sees it's less than the max number of lines under which it can avoid scaling and doesn't scale.
When it compares 1918 after crop to 3840, it concludes "well this image needs to change more than 50 lines after cropping so let's scale" Using a doubler in your upscaling then just makes the problem worse, but NGU is not the root cause.
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26th February 2019, 05:09 | #54979 | Link | |
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I'm not actually sure if it's just ngu, i haven't tested that. But I think it's prolly just coming up short after cropping to 1918 or 1919, after doubling, short of 3840. But with 3840x2160, I have a file, it'd crop to 3839, detection works here, even though chroma is also NGU. So I guess it all comes down to whether there is a second round of scaling. the first round is detected properly
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Tags |
direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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