madVR - high quality video renderer (GPU assisted)

[j82k]

Let me guess, you have a 2017 Oled? As far as I know they changed the behavior of ABL. Where it was contrast that affected it 2016, apparently it is now oled-light that affects ABL in 2017.

[Asmodian]

Yep, 2017 C7P.

[huhn]

Originally Posted by Asmodian

No, they are saying that the TV is the same brightness no matter the area being displayed. ABL limits the total power output, not the way HDR content is mapped to the TV's range. ABL is not kicking in for the blended frames but not for the unblended ones.

so you tried all brightness combination in squeal frames to check that the "gamma curve" is not altered in HDR mode?

[Asmodian]

No, I simply measured a 20% patch with and without a 100% window being displayed. That should be enough shouldn't it? I don't need to test every combination.

If I turn OLED brightness up the behavior is not the same, then dragging in the 100% window dims the 20% patch.

[huhn]

no that doens't help real playback. and obviously you can't test all combination that's the point of it. patches can only get you this far.

the problem here is not that a patch get's bigger is that a single frame changes it brightness for a very short time (16 ms) and it shows visible issues in HDR mode and not in SDR mode.

[djc5166]

Is there anyway to have madvr render subtitles at a lower brightness for HDR content? It looks like any subtitles are put at maximum brightness which is really distracting, also it makes the ABL dim everything else on the screen into nothingness.

[Asmodian]

Originally Posted by huhn

the problem here is not that a patch get's bigger is that a single frame changes it brightness for a very short time (16 ms) and it shows visible issues in HDR mode and not in SDR mode.

True, something is odd. I was simply trying to show it probably isn't ABL at fault, because ABL doesn't kick in even with much larger changes in brightness.

[seiyafan]

Is 1050 TI a decent upgrade from R9 270x? I think my current graphics card is about to reach the end of its life so I am looking for replacement. Which card spec has the most weight on the speed for NGU/SSIM/ED?

Edit: Forgot to mention I use it to upscale 1080 to 1440.

[MrDVader]

Hi all.

I wish to upscale SD to 4k. I have an old i5 2500k CPU, running win7.

Can I just upgrade my current GPU (HD7950) with a GTX 1080 with a view to upgrading the rest of the machine in future, or will the current CPU be too much of a bottleneck?

[huhn]

Originally Posted by seiyafan

Is 1050 TI a decent upgrade from R9 270x? I think my current graphics card is about to reach the end of its life so I am looking for replacement. What specs has the most weight on the speed for NGU/SSIM/ED?

Edit: Forgot to mention I use it to upscale 1080 to 1440.

similar performance i guess the r9 270x may be faster. so if the r9 still works and you don't want some hardware decoder you are wasting your money.

for NGU don't get polaris and there are no numbers to look out for. generally better pascal card will be generally better for madVR.

@MrDVader
CPU doesn't matter 1050 ti up to 1080 ti are all work for UHD.
i don't know why someone would be a GPU right now if they don't have too.

[mclingo]

Hi, bobbing in my NVIDA 1050 while i'm waiting for my new card, which is the best driver to use at the moment?

[GCRaistlin]

I'm going to buy a new notebook, don't want to overpay for things that will never be used. There's (1) with Intel HD Graphics 610 and (2) with NVIDIA GeForce 940MX. What's the difference between these video adapters for playing low resolution videos at 1920x1080 display with madVR?

[varekai]

Originally Posted by GCRaistlin

I'm going to buy a new notebook, don't want to overpay for things that will never be used. There's (1) with Intel HD Graphics 610 and (2) with NVIDIA GeForce 940MX. What's the difference between these video adapters for playing low resolution videos at 1920x1080 display with madVR?

http://gpu.userbenchmark.com/Compare...28796vsm225196

[GCRaistlin]

varekai, I don't see the answer to my question there. The only thing requiring GPU power will be madVR. No games or something like that.

[el Filou]

GeForce 940MX has about 4 times more processing power than HD610 (when HD 610 can reach its max boost clock, which isn't guaranteed).
12 EU Intel GPUs are pretty useless for madVR.

[huhn]

even a hd610 will work fine for 1080p output. just don't expect more than basic scaler.

[mclingo]

There are many gaps in my understanding of MADVR, hopefully someone can fill this one for me.

I have 3 remux MKV copies of start trek 2009, a standard 1080p bluray, a 4k 2160p SDR rip and a 4k 2160p HDR rip, rendering on the standard bluray is 15ms but its 30 on the 4k copies, chroma is 1.5ms on the 1080p bluray but 15ms, 10x more on the 4k material, surely there should be more upscaling going on for the 1080p copy.

Whats going on here?

[Asmodian]

Chroma upscaling is only used to get the chroma to the same resolution as the luma.

For 1080p chroma upscaling takes 960x540 to 1920x1080.
For 4K chroma upscaling takes 1920x1080 to 3940x2160.

Image upscaling should be taking more rendering time with the 1080p source while it should not even be active with the 4K sources. Assuming you have a 4K display?

[mclingo]

yeah 4k TV, so chroma for 4k material starts off at 1080 and is scaled to 2160, forgive my noob questions but why is chroma not already 2160p?

[Asmodian]

Originally Posted by el Filou

GeForce 940MX has about 4 times more processing power than HD610 (when HD 610 can reach its max boost clock, which isn't guaranteed).
12 EU Intel GPUs are pretty useless for madVR.

While this is true you need understand how the dGPU is connected to the display. If it uses a "through the iGPU" setup like Optimus I would rather have the HD610. Cubic, spline or lanczos are good enough for most laptop displays and Optimus is more trouble than it is worth. With something more powerful directly connected to the display you can use better scalers, but a 940MX is still not going to be able to use NGU is it? (I actually don't have much experience with madVR on low end GPUs)