madVR - high quality video renderer (GPU assisted)

[mclingo]

anyone else getting block corruption when skipping through a movie using D3D11? May just affect AMD RX models though or just me. I have had this issue before and quite badly, early driver versions for my RX480 had this problem for months before getting fixed.

No issues with copy back though which is why i'm still using that.

[aufkrawall]

.ts container? It's not seeking friendly, I can't confirm such an issue with mkv.

[mclingo]

no, mkv's - i'm on quite an old driver though, 17.10.2 as AMD havent written a stable driver for the last 4 versions, each one randomly hangs my machine.

[Asmodian]

Originally Posted by varekai

So would I be better off disabling "Hardware acceleration (DXVA) settings" -->" Use DXVA" --> "Use D3D11 DXVA first"?
Using PotPlayer + madVR.
Thinking that it would be better to let madVR do all the rendering job?

You want D3D11 DXVA if you use DXVA at all. madVR needs decoded video to start with but it likes software decoding or copyback more than native. None of those PopPlayer options mention native or copyback, I don't know what PotPlayer is doing.

[varekai]

Originally Posted by Asmodian

You want D3D11 DXVA if you use DXVA at all. madVR needs decoded video to start with but it likes software decoding or copyback more than native. None of those PopPlayer options mention native or copyback, I don't know what PotPlayer is doing.

Thanks for the info, appreciate it!
Using a Nvidia GeForce GTX 960 4GB on 2 2560x1440 displays and a Panasonic TV 1080p 1920x1060.
Windows 7.
I'll try these new settings and see what results I get.
--------------------------
From PotPlayer settings:
Filters --> Use Built-in DXVA Video Decoder
Manage Filters --> Built-in codec/DXVA settings --> Hardware acceleration (DXVA) settings --> Use DXVA --> Use D3D11 DXVA first
DXVA2 Copyback: D3D9: Auto
--------------------------

[-Hitman-]

Originally Posted by aufkrawall;

I just gave DXVA2 native a quick try on AMD (Polaris, Windows 10 CU2): I can confirm the 10 bit banding issues there as well.

Same here - Windows 10 CU2 v1709.

Originally Posted by mclingo

anyone else getting block corruption when skipping through a movie using D3D11?

No issues with copy back though which is why i'm still using that.

No problems with .mkv on intel 630 - D3D11.

Anyone explain why DXVA copy-back loses tons of frames and has pretty bad stutter with 4k (frame rate is correct)?

[nussman]

Did you check CPU load with dxva copy-back?

[mclingo]

[QUOTE=-Hitman-;1832532]Hi, I've found a serious banding issue (scenes with white clouds show a pink posterization/banding effect) with UHD HDR movies, /QUOTE]


No banding here for me, ive checked that particular scene on both the full HDR remux and the SDr conversion that are knocking about on torrents, neither shows anything in that scene for me.

Was this defo a full remux you were viewing?, are you passing HDR through to your TV or converting in MAVR?

WIn10
RX550
copyback or D3D11
4k 4:2:0 - havent tried 4:4:4 full RGB.

[Asmodian]

Originally Posted by -Hitman-

Anyone explain why DXVA copy-back loses tons of frames and has pretty bad stutter with 4k (frame rate is correct)?

Copyback needs to copy the entire raw video data from GPU memory space to CPU memory space and Intel's iGPUs don't have very much memory bandwidth, 10 bit 4Kp60 is 14.93 Gbps (~1.9GB/s). 128 bit (dual channel) DDR4 2400 is only around 35 GB/s. Even the 2GB 1050 has 112 GB/s and PCIe 3.0 x16 has 15.8 GB/s.

[MS-DOS]

Originally Posted by Asmodian

DXVA2 Native decoding blurs the chroma when it transfers to madVR but DXVA2 copyback does not.

That's only true for Nvidia and Intel GPUs.

[Asmodian]

Originally Posted by MS-DOS

That's only true for Nvidia and Intel GPUs.

Originally Posted by aufkrawall

I just gave DXVA2 native a quick try on AMD (Polaris, Windows 10 CU2): I can confirm the 10 bit banding issues there as well.

Just let DXVA2 depart in peace, it doesn't fit in the post-EVR times...

I am not sure AMD is free from problems, but I think you are correct when using with 8-bit video. Also, the poster had an Nvidia GPU and the quote was from a reply to someone with an Intel GPU probably playing 10-bit HEVC.

[MS-DOS]

aufkrawall

I'd be grateful for a 10 bit HEVC sample where you see banding while doing native DXVA2.

[stefanelli73]

Originally Posted by mclingo

so it does this even with 23,976 movies?

Do you have 1080p23 included in your Display modes in MADVR?

take a screen shot of your CONTROL+J screen.

Yes 1080p23, 1080p24, etc...

[mclingo]

Originally Posted by stefanelli73

Yes 1080p23, 1080p24, etc...

its worth ruling out JRIVER, install MPC-HC, it has latest LAVs.

Set decoder to copy back and renderer to MADVR, set MPC to full screen and try again.

post your CONTROL+J screen

[el Filou]

Hi madshi, I have a question about a note in the config GUI: next to "measure each frame's peak luminance" for HDR, it says: "(Does not work with DXVA scaling / decoding)". Is that still valid?
I'm using DXVA11 Native decoding for 2160p, and if I enable ShowRenderSteps, it does show a step 'measure peak luminance'.
Who's right, the config GUI or the OSD?

[stefanelli73]

Originally Posted by mclingo

its worth ruling out JRIVER, install MPC-HC, it has latest LAVs.

Set decoder to copy back and renderer to MADVR, set MPC to full screen and try again.

post your CONTROL+J screen

I installed the last LAV also in JRIVER

[aufkrawall]

Originally Posted by MS-DOS

aufkrawall

I'd be grateful for a 10 bit HEVC sample where you see banding while doing native DXVA2.

Just take anything with a gradient.


It even manipulates colors, pure trash.

[-Hitman-]

Originally Posted by nussman

Did you check CPU load with dxva copy-back?

Yes, well below 5% on most cores.

Originally Posted by mclingo

No banding here for me, ive checked that particular scene on both the full HDR remux and the SDr conversion that are knocking about on torrents, neither shows anything in that scene for me.

Was this defo a full remux you were viewing?, are you passing HDR through to your TV or converting in MAVR?

WIn10
RX550
copyback or D3D11
4k 4:2:0 - havent tried 4:4:4 full RGB.

Not a re-mux but a complete/untouched rip image, see previous Ctrl+J image I uploaded - (OS HDR) windows enabled HDR, Madvr set to - HDR passthrough.

Originally Posted by Asmodian

Copyback needs to copy the entire raw video data from GPU memory space to CPU memory space and Intel's iGPUs don't have very much memory bandwidth, 10 bit 4Kp60 is 14.93 Gbps (~1.9GB/s). 128 bit (dual channel) DDR4 2400 is only around 35 GB/s. Even the 2GB 1050 has 112 GB/s and PCIe 3.0 x16 has 15.8 GB/s.

Ah ok, thanks for the info, that'll be why.

[Arm3nian]

Is the method to using madVR to take a screenshot dependent on the media player? I'm using Alt + I (which is the default shortcut) on mpc-be, is this the correct way?

I have a 4k HDR REC. 2020 file and saving 200% view as png crashes. It works with bmp. Saving 300% view as bmp just maxes out my memory (16GB), then drops to 100MB and madVR crashes saying it can't write to a certain address. Obviously 3x 4k is dumb but should it work?

[zapatista]

Hi Madshi,

re: down-converting 4k (10 bit) video to 1080 (10 bit)

can you plz comment if your program converts 4k 4.2.0 YUV (10 bit ) to 4k 4.4.4 RGB before downscaling it to 1080 10bit RGB ? (eg doing the RGB conversion first while still in 4k ).
the purpose would be to maintain a larger part of the much higher chroma and luma information from the 4k file (@ 4.2.0 YUV in 4k ) in the conversion process to 1080p video (@ 4.4.4 RGB)

if yes, do i need to use any specific settings in madvr to ensure this occurs correctly ? (other then setting my ati control panel to output RGB 4.4.4 over the HDMI video output to my display).