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14th March 2018, 19:08 | #49561 | Link | |
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What would you say is the main drawback of using the precomputed data for color space conversion in terms of color accuracy? Is it something a reasonable person should be worried about? Does it make sense to skip the expensive full computation even for critical applications like madVR? |
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16th March 2018, 00:13 | #49566 | Link |
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Best to read a guide and set things to your own preference.
NGU is a popular upscaler/supersampler, SSIM for downscaling (2D generally over 1D) and NGU AA for chroma. Personally I'd grab Asmodian's profile and tweak to suit your available performance. Everyone's settings are different. |
16th March 2018, 01:13 | #49567 | Link |
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I'm using Kodi DSPlayer + madVR to play 4K HDR content on a FullHD SDR screen. It works perfectly until subtitles appear on the screen. After that playback becomes somewhat jerky, it seems there are lots of dropped frames even without subtitles on the screen. I've checked the frame stats with and without subtitles - I see no obvious difference in numbers at all, but there's huge difference in playback smoothness. And there are actually no dropped frames in the stats, the playback just looks as if there are lots of them.
Is it the known issue? Does it have a solution? My system specs: i7700K CPU/iGPU, Win10 Pro x64, Kodi DSPlayer v17.6, madVR v0.92.12, LAV Filters 0.71. |
16th March 2018, 12:40 | #49569 | Link |
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Is smooth motion working correctly in native HDR mode @ 59/60Hz?
I noticed that on pretty much every HDR movie when the credits are rolling it looks like they are flashing/blinking rapidly as if the blended frames had a lower or higher brightness than the real frames. This only happens in native HDR mode. HDR to SDR conversion doesn't show this effect. |
16th March 2018, 16:07 | #49570 | Link |
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DSPlayer uses XySubFilter. This is probably a DSPlayer bug. Give MPC a try.
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16th March 2018, 17:28 | #49572 | Link |
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Fwiw, I've been using the official KODI with no Xysubfilter. Subs have never been a problem from the BD menu and are mapped to my remote keyed 'subtitle menu'. Many customizations in MPC for subs as well. Matter of fact, I've been playing with external.srt's + BDMV file structure to automate them. No English sub for foreign spoken parts (only) are not uncommon. Getting an external sub to load with an iso takes a lot of navigating and requires mouse. I've got it to load with a couple remote clicks now.
I've always been using MPC-BE for all the settings it offers that MPC-HC doesn't. They are very handy and I will miss them. Lately, MPC-BE has been crashing and/or madVR as well, sometimes at video start, sometimes at end. madVR has not been sending crash reports for some reason either. Other oddities like MPC-BE does not auto exit anymore and instead restarts the title. All this despite not changing a thing I know of? Tried many combos or rolling back player versions from the nightlies I've always used as well as LAVFilters. I think I even rolled back madVR a version or two? Last night I got sick of it and replaced MPC-BE with MPC-HC and used the same upgraded external LAVFilters instead of the built in version and now all is well again. Perfect actually. Then proceeded to play with sub settings in MPC-HC trying to mimic what MPC-BE used to do. In the end I just put the .srt inside the bdmv folder and ripped it to iso again so MPC can be at the default directory when 'load sub' is opened. Would Xysubfilter simplify any of this (ripping bdmv with .srt placed in directory) and simplify (loading .srt instead of automating as default), or do you all use partial mkv's and not full iso disc backups?
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HOW TO-Kodi 2D-3D-UHD (4k) HDR Guide Internal & External Players W11 Pro 24H2 GTX960-4GB RGB 4:4:4 @Matched Refresh Rates 8,10,12bit KODI 22 MPC-HC/BE 82" Q90R Denon S720W |
16th March 2018, 18:10 | #49573 | Link |
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Interesting question, all my HDR content is 23.976 so I have not been using smooth motion with it.
Does this still happen with "use linear light for smooth motion" off? It is a trade quality for performance option. I am traveling now but will test it myself when I get home.
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16th March 2018, 19:26 | #49574 | Link | |
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the blended frames are not that bright as the original so the TV is compensating for that creating a very visible difference. make totally sense SDR is pretty stable unlike HDR which is currently a total mass with no TV even getting close to the spec and every one does what he wants. |
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16th March 2018, 19:28 | #49575 | Link |
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I already had all the trade quality for performance options turned off but enabling "use linear light for smooth motion" amplifies the blinking/flashing even more.
I do only notice this during the scrolling credits though, not within the movie but I guess it also persists during the movie but is way less obvious. Switching between "passthrough HDR" and "Convert HDR to SDR" it becomes really apparent that there is something wrong with smooth motion combined with passthrough HDR. edit: It's not ABL, it still flickers if I turn the contrast on my TV (LG 55C6) to 0 which eliminates ABL. Last edited by j82k; 16th March 2018 at 19:34. |
16th March 2018, 19:40 | #49576 | Link |
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it'S not possible to disable ABL on OLED.
and changing the contrast doesn't change that the input brightness is way way higher than that what the TV is able to do so it need to be compensated. and just to make this clear OLED are the worst at this for multiply reasons. |
16th March 2018, 20:04 | #49577 | Link |
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On the 2016 Oleds lowering contrast (in the TVs settings) does reduce the effect ABL has. Reducing contrast below ~46 for SDR or ~20 for HDR causes ABL to not have any visible effect anymore. It's easily verifiable as a small white window will have the same brightness as a fullscreen white window if you lower the contrast to the mentioned values.
So it can't be ABL that's causing this. But that doesn't mean I would rule out some other weird thing the TV is doing for whatever reason. If someone with an LCD HDR TV could test this we would know if it's a TV or a madVR problem. Last edited by j82k; 16th March 2018 at 20:08. |
16th March 2018, 20:32 | #49578 | Link |
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a Tv with what ever setting can now magical display 1000+ nits or what are you trying to say me?
HDR has a brightness way over what any screen can do even at max brightness so it has to compensate for it. so what does a TV do ? it scans the image to see how much of the maximal brightness is used in the image and compensate for it. and like i said before an blended black image with white text doesn't have the same max brightness is "different" so the TV will compensate more for it. so what does an OLED screen do if the image isn't at it max brightness it make less bright images brighter and bright image dimmer. which is just ABL or if you prefer dynamic contrast. why doesn't this happen with SDR? because it doesn'T try to display 1000+ nit and it doesn't have to heavily compensate in this case. |
16th March 2018, 20:52 | #49580 | Link | |
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I also notice that at low OLED brightness settings it doesn't matter what patch size I use, I measure the same brightness and gamma curve. This is true even in 10000 nits HDR mode and is independent of the peak white being displayed during a particular frame. I can drag in a window displaying peak white and a 20% brightness patch measures exactly the same as when it is the only thing being displayed.
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direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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