madVR - high quality video renderer (GPU assisted)

[thighhighs]

Originally Posted by waldnebel

I came across something strange while letting madVR upscale a cute little 240p movie to 4k resolution. Please have a look at the following output:

luma -> NGU Sharp (very high) 4x -> Jinc AR

As I understand it the NGU sharp algorithm is applied 4 times and on the third round my little 240p movie should have a height above 2160 pixels. At this point downscaling is quite an interesting part. Why in the name of this planet is Jinc afterwards applied and no downscaling? I think I'm a little bit too stupid to get it.

Here direct quadrupling: 240p x 4 = 960p. Jinc used for additional upscaling to target resolution.
Im not sure about ngu upscaling abilities after quadrupling step. Anyway quality is bad, because source resolution low and scaling factor big.

[el Filou]

I've tested NGU on "Ultra Low Definition" material, e.g. 360p YouTube, and it's just too weird, the picture looks like a watercolour painting.

[Manni]

Originally Posted by jmone

Yup done that (DDU in safe mode) and it is looking good using what you just posted (just running a UHD BD now to check the frame repeats). The only stuff that I guess will not work is titles like Billy Lynn (UHD @ 60p with HRD). I've read the JVC Calibration thread and got the Spyder5 Ultra ready to go now that the basic config seems to be working well - Thanks for the clear post all in one place

Edit - and resetup and test BD - 3D

It will work fine for Billy Lynn if you disable HDR metadata with 4K60p content, otherwise you will get the magenta bug with the JVC. You also want to tell MadVR that dithering is 8bits, not 10bits in that case. I use profiles to do this automatically.

[njfoses]

Originally Posted by Asmodian

There is an OSD bug that shows the SDR 3DLUT being used even with using HDR passthrough, but the 3DLUT is not actually being used (a test 3DLUT that should change the image a lot does not show any effect). The SDR 3DLUTs are only active for HDR content when madVR first converts HDR to SDR by either method.

Thank you!

[jmone]

Originally Posted by Manni

It will work fine for Billy Lynn if you disable HDR metadata with 4K60p content, otherwise you will get the magenta bug with the JVC. You also want to tell MadVR that dithering is 8bits, not 10bits in that case. I use profiles to do this automatically.

Thanks - I could do that, but so far I've only the one and it is not that great of a movie. I presume however the "better" option will be to use the HRD->SDR conversion option that is currently being work on (when it is ready) for all HDR content?

[leeperry]

Originally Posted by mclingo

dont think that card is a true 4k card, you'll only get a sub 60hz desktop at 4k, fine if you're not using your HTPC for anything else but I wonder if you'll have other issues with it not being a full 4k card with the increased HDMI bandwidth, you'll need to look into that.

you could pickup an RX 460 for about 60, you'll get NGU sharp low around 30ms rendering, that What I was getting prior.

EDIT pretty sure its HDMI 1.4 spec, unless there was a late HDMI 2.0 version?

Right thanks, but even a RX580 isn't all that faster than my o/c 7850(basically as fast as a 7870): http://gpu.userbenchmark.com/Compare...870/3923vs2161

only +54% in some benchmarks and apparently Polaris doesn't like NGU huh, I got all bells and whistles enabled(SSIM 2D, ED2, NGU, Luma & Chroma SuperRes) with my 7850 @1080p so I guess I'll have to throttle it all down a good bit for 2160p and even a RX580 wouldn't quite be the savior either as it would appear.

Apparently Club 3D make dongles that convert DP to HDMI 2.0 allowing 2160p60 on any semi-recent AMD so that's another option, hopefully hiccup-free

[Asmodian]

Originally Posted by el Filou

I've tested NGU on "Ultra Low Definition" material, e.g. 360p YouTube, and it's just too weird, the picture looks like a watercolour painting.

Which NGU? I prefer NGU Anti Aliasing for <SD.

[ryrynz]

Yes.. This is exactly the use case for NGU AA. You don't use normal or sharp NGU on resolutions that low.
Also you'll need to pay particular attention to your screen and madvr sharpness settings.

[huhn]

NGU sharp is known to show significant problems with flawed low res images like DVDs.
using RCA and add grain can help a lot.

Originally Posted by waldnebel

EDIT: I have also a second question. Isn't it possible to apply pixel shaders while using D3D11 copy-back decoding? mpc-hc says it can't use pre or post resize pixel shaders and I simply don't know why.

shaders are done on the GPU is should work with all decoding types.

[Manni]

Originally Posted by jmone

Thanks - I could do that, but so far I've only the one and it is not that great of a movie. I presume however the "better" option will be to use the HRD->SDR conversion option that is currently being work on (when it is ready) for all HDR content?

When it's ready, for sure.

[sniper]

"don't draw subtitles" on screenshots is not working

v0.92.14

Anybody else getting this? tried it on several different videos, anime w/ soft subs and also movies with srt file same results

[sneaker_ger]

What subtitle renderer are you using? The function doesn't work with subtitle filters that render on the video themselves ((xy-)vsfilter), only with those that use a separate subtitle interface (MPC-HC ISR, XySubFilter, AssFilter(Mod)).

[jmone]

Originally Posted by Manni

When it's ready, for sure.

Had a play with the test builds over at AVS. Looks good though the rendering overhead of HDR-->SDR seems to much for my 1070 on UHD HDR 59.94 content. Can't get the render times down under the required 16ms for 59.94 content (all high 20ms+) regardless of the Chroma scaling used. Unless you have any ideas of combos that work with a 1070 it looks like a 1080/1180 will be the next purchase.

[Manni]

Originally Posted by jmone

Had a play with the test builds over at AVS. Looks good though the rendering overhead of HDR-->SDR seems to much for my 1070 on UHD HDR 59.94 content. Can't get the render times down under the required 16ms for 59.94 content (all high 20ms+) regardless of the Chroma scaling used. Unless you have any ideas of combos that work with a 1070 it looks like a 1080/1180 will be the next purchase.

You need profiles to use less power with UHD @ 50/60p, for example with bilinear chroma etc. It should be just doable. Certainly not a problem for the 1080ti.

[jmone]

FYIW - I tried all the Chroma scaling options including bilinear - all in the 20ms+ on the 1070.

EDIT: Depending on the HDR-> SDR Settings (like using Clipping) you can almost get away with no drops on bilinear....

[huhn]

what are your nvidia powersettings?

[veggav]

What test builds?

I'm stuck with an older version of MadVR because the newer ones don't work with UHD BD menus with Jriver media center.

Is this a closed thing? Or can I also try newer builds here?

[ryrynz]

The test builds are for HDR tonemapping improvements, ain't gonna fix your problem. Just wait.

[jmone]

The fixes for the issue with BD Menus sometimes being off the screen is fixed in the test builds. Still it is best to wait till a new version is out and is packaged with JRiver.

[Warner306]

Are the rendering stats now accurate, for those of us who have seen them drop after the last Windows Update?