madVR - high quality video renderer (GPU assisted)

[CruNcher]

Originally Posted by huhn

or you are not using madVR...:
https://abload.de/img/madvrldp0v.png

this is without debanding. i don't even want to know how you get so much banding in picture.

8 bit output chain because that's what we talked about debanding 8 bit and how efficient MadVR does it

10 Bit p010 is real 10 bit and most probably never needs debanding with those inputs and then it's entirely up to your display panel efficiency what you'll see

10 bit->8 bit->MadVR (Debanding)->Panel

you now did

10 bit->MadVR (no debanding/no dithering)->Panel

Lets sumarize it

10 bit->MadVR (Pure)



10 bit->8 bit->MadVR (Pure)



10 bit->8 bit->MadVR Debanding High



10 bit->8 bit->Ordered Dithering->MadVR (Pure)



10 bit->8 bit->Random Dithering->MadVR (Pure)



Wow here you really see the Power of Ordered/Random Dithering that is Psy wise almost a 100% hit of the input quality without MadVR touching anything.

Now it shouldn't surprise anyone anymore why there is no (No Dithering) Option in Lav Video

[ryrynz]

Jesus, would you look at that detail loss on the transparent skirt in 8 bit... Crazy.
Looks like there's some debanding required even in 10 bit

[Clemens]

I described my problem here: https://forum.doom9.org/showthread.p...14#post1792014

Here the ctrl-j output: http://puu.sh/td7rh/19227caded.jpg
Here a sample: https://www.dropbox.com/s/cbbp9073q8...20UHD_.ts?dl=0

Kind regards,
Clemens

[CruNcher]

That combination seems to cry after problems 8bit p10 DXVA2

Try Fullscreen Exclusive to get into 10 bit

[Clemens]

The same problems on a channel with p1010 10 bit 4:2:0 (dxva2)
http://puu.sh/td8tH/3ca44b49e7.jpg
(If sample needed please ask)

I will try your suggestion
EDIT
How do I do this? (sorry I'm a noob )
Which shortcut I have to press or which setting I have to change for this?

[CruNcher]

These 2 options at least



Then go into Fullscreen

[YxP]

Originally Posted by Asmodian

That is due to the fade detection kicking in. If you keep debanding at the same strength fade detection doesn't run at all for a small increase in performance, and it never rerenders 5 frames which causes that spike and can cause dropped frames.

This is completely from my memory and don't really want to go into any testing, but try disabling use a separate device for presentation. I did sometime ago and haven't had problems since. I did other changes as well so that's why I'm mostly guessing here.

[Clemens]

I have done some more tests:

- CPU decoding -> colors are fine (off course no fluent image)
- DXVA2 + custom EVR Renderer -> works fine
- DXVA2 + MadVR -> doesn't work

--> seems to be very similar to the magenta bug in the bug tracker:
http://bugs.madshi.net/view.php?id=456

I guess DXVA2 is doing something wrong...

Have you the same problems with other GPUs? (mine is a GTX 960)

The Exclusive mode doesn't change anything...

Problem is there for all 4k HEVC 10 bit channels (also the HLG teststream channel)

[CruNcher]

Indeed strange VP7 should do it are you sure the Mixer input output types are 10 bit with EVR Custom rendering and DXVA ?
And are you in 10 bit Display Driver Mode also for MadVR and still in Exclusive Fullscreen you get those color shifting ?

[Clemens]

I have no idea what the EVR renderer does How can I check this?
And I'm using a 8bit UHD display.
If you mean with your question "the native display bitdepth is:" then I can say I tried 10 bit and 8 bit there no difference.
Can you play the sample file without any problems (some posts above)? Would like to know if only I have the problem.
And what do you mean with the VP7 thing? (as said I am a noob )

Btw. thanks for looking at it (it's not that important to me I just thougt to report it to make madvr better if the bug is in madvr)

[Damien147]

Originally Posted by Clemens

I have done some more tests:

- CPU decoding -> colors are fine (off course no fluent image)
- DXVA2 + custom EVR Renderer -> works fine
- DXVA2 + MadVR -> doesn't work

--> seems to be very similar to the magenta bug in the bug tracker:
http://bugs.madshi.net/view.php?id=456

I guess DXVA2 is doing something wrong...

Have you the same problems with other GPUs? (mine is a GTX 960)

The Exclusive mode doesn't change anything...

Problem is there for all 4k HEVC 10 bit channels (also the HLG teststream channel)

Same results with an RX 470 here,dxva2(native) gives black screen.

[Damien147]

Originally Posted by baii

Have a Rx460, don't seem to have much problem with ngu 1080p to 4k.

Really?With rx470 the best I can do is ngu med.Is there something wrong with my system?

[Asmodian]

Originally Posted by CruNcher

10 bit->8 bit->MadVR (Debanding)->Panel

That isn't how madVR works, what are you doing to get it to 8-bit before madVR?

10 bit->16 bit madVR (debanding)->8-bit->Panel

Originally Posted by Damien147

Really?With rx470 the best I can do is ngu med.Is there something wrong with my system?

ngu low is consistent with "NGU 1080p to 4k"?

[CruNcher]

10 bit P010->YV12 8 bit (no dithering)->MadVR Debanding High

Is the heavy banding result above

with 10 bit P010->YV12 8 bit (Ordered/Random Dithering) has the biggest visual Deband effect, you virtualy dont need MadVR Debanding High and it's overhead anymore.

[Clemens]

Other test done with my problem: DXVA2(copy back) works also fine and with correct colors...DXVA2(native) gives the purple screen...

So:
DXVA2 (native) -> EVR custom -> OK
DXVA2 (native) -> MadVR -> NOT OK, purple colors
no Hardware Decoding -> OK with both (but stuttering bacause of software decoding)
DXVA2 (copy back) -> both OK

[CruNcher]

Same with the Samsung 10 bit Streams ?

http://demo-uhd3d.com/fiche.php?cat=uhd&id=91
http://demo-uhd3d.com/fiche.php?cat=uhd&id=97

Hmm so DXVA Native wont work, but why ?

Native Display Bitdepth (Driver) should be 10 bit The Controll Panel should be set to 10 bit

Though if it only would work with copyback that wouldn't be really that bad the overhead is not that much bigger normally, though for people with laptops that want maximum power saving could be a problem.

VP7 stands for Video Processor (Version 7) the VPU (Video Processing Unit) inside of your GM206 GTX 960 also called marketing wise Nvidia PureVideo.

[Damien147]

Originally Posted by Asmodian

ngu low is consistent with "NGU 1080p to 4k"?

The performance gap between these two seemed bigger.Well...ok.

[Clemens]

yes same thing with the demo...with copy back it works, with native wrong colors...

[huhn]

Originally Posted by CruNcher

8 bit output chain because that's what we talked about debanding 8 bit and how efficient MadVR does it

10 Bit p010 is real 10 bit and most probably never needs debanding with those inputs and then it's entirely up to your display panel efficiency what you'll see

sorry you should read up the basic how picture processing is working in a PC.

i will never post you a 10 bit screen because it is technically not doable.

setting the output to 10 bit doesn't mean you get 10 bit too. the windows desktop is working in 8 bit.

madVR is not debanding when outputting 8 bit.

@Clemens
DXVA native is a lowering picture quality with nvidia and it should be avoided using madVR.

your GPU is not by any chance a 2 GB GTX 960?

[sneaker_ger]

Originally Posted by huhn

madVR is not debanding when outputting 8 bit.

What exactly are you trying to say?
Madvr is debanding when - unsurprisingly - debanding is ticked in the settings. This is also true for 8 bit output.