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Old 31st January 2018, 22:27   #48781  |  Link
-Hitman-
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Quote:
Originally Posted by sneaker_ger View Post
LAV nightly adds D3D11 in case you haven't tested yet.
+ @Asmodian

Thanks guy's, thought H/W decoding - disabled, initiated D3D11.

I'll get it installed and report back.
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Old 31st January 2018, 22:39   #48782  |  Link
-Hitman-
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Brilliant, D3D11 works perfect and now nice and clear, better stats too.

Big thanks!
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Old 1st February 2018, 07:00   #48783  |  Link
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Originally Posted by Asmodian View Post
Yeah, DXVA2 native sucks. It is a little faster though.

Edit: sneaker_ger's point is important, D3D11 Native decoding is better than DXVA2 Native and also does not copyback, give it a try.
Hi Asmodian,

Could please elaborate a bit more about this?

What are the advantages from copy back over native? I'm still trying to learn about this and reading through Google is a bit confusing.

If I did understand correctly, with copy back you can use options in madvr that other way are not having any effect?

Also lav nightly with D3D11 is better than native?

I have a gtx 1080 msi armor gpu.

Regards!
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Old 1st February 2018, 07:58   #48784  |  Link
Asmodian
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DXVA2 Native decoding blurs the chroma when it transfers to madVR but DXVA2 copyback does not. D3D11 native does not have this problem.

All native decoding methods skip madVR's CPU based algorithms because the video stays on the GPU after decoding; it is not copied back to system memory. madVR only has a few CPU based algorithms, IVTC/Film deinterlacing and cropping black bars, and with modern video sources these usually aren't needed.
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Old 1st February 2018, 08:43   #48785  |  Link
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Quote:
Originally Posted by Asmodian View Post
DXVA2 Native decoding blurs the chroma when it transfers to madVR but DXVA2 copyback does not. D3D11 native does not have this problem.

All native decoding methods skip madVR's CPU based algorithms because the video stays on the GPU after decoding; it is not copied back to system memory. madVR only has a few CPU based algorithms, IVTC/Film deinterlacing and cropping black bars, and with modern video sources these usually aren't needed.
Many thanks! I will stick with copy back then.

Regards!
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Old 1st February 2018, 10:35   #48786  |  Link
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Quote:
Originally Posted by Asmodian View Post
DXVA2 Native decoding blurs the chroma when it transfers to madVR but DXVA2 copyback does not. D3D11 native does not have this problem.

All native decoding methods skip madVR's CPU based algorithms because the video stays on the GPU after decoding; it is not copied back to system memory. madVR only has a few CPU based algorithms, IVTC/Film deinterlacing and cropping black bars, and with modern video sources these usually aren't needed.
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?

Best regards
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Old 1st February 2018, 12:25   #48787  |  Link
stefanelli73
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I have an AMD RX480 video card, I use JRIVER media player and I use Windows 10 operating system, in VIDEO LAVs if I use COPY-BACK during a movie I have several dropped frames, while with Windows 8 it did not happen, instead with NATIVE 0 dropped frames; I also noticed that D3D11 does not decode well interlaced material, such as music concerts that are all at 1080i60.
Someone could tell me why?
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Old 1st February 2018, 12:50   #48788  |  Link
mclingo
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Originally Posted by stefanelli73 View Post
I have an AMD RX480 video card, I use JRIVER media player and I use Windows 10 operating system, in VIDEO LAVs if I use COPY-BACK during a movie I have several dropped frames, while with Windows 8 it did not happen, instead with NATIVE 0 dropped frames; I also noticed that D3D11 does not decode well interlaced material, such as music concerts that are all at 1080i60.
Someone could tell me why?
Are you playing movies at their native refresh rate or at 60hz, assuming your display is 60hz?
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Old 1st February 2018, 12:51   #48789  |  Link
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Originally Posted by stefanelli73 View Post
I also noticed that D3D11 does not decode well interlaced material, such as music concerts that are all at 1080i60.
Someone could tell me why?
Deinterlacing via D3D11 is not supported yet. We have to wait until madshi find some time to add this.

No sure about the frame drops with dxva copy back, but I noticed that my system is not fast enough for 4K HEVC with dxva copyback (works fine with dxva native).
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Old 1st February 2018, 13:58   #48790  |  Link
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Originally Posted by mclingo View Post
Are you playing movies at their native refresh rate or at 60hz, assuming your display is 60hz?
Yes native refresh 23,96....I have an EPSON 9300 videoprojector
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Old 1st February 2018, 14:04   #48791  |  Link
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Originally Posted by stefanelli73 View Post
Yes native refresh 23,96....I have an EPSON 9300 videoprojector
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.
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Old 1st February 2018, 17:23   #48792  |  Link
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Originally Posted by Asmodian View Post
Do you get the same issue with DXVA2 copy-back or D3D11 decoding in LAV? DXVA2 native decoding is known to damage quality on Nvidia GPUs (maybe Intel has issues too?).
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...
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Old 1st February 2018, 18:37   #48793  |  Link
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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.
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Old 1st February 2018, 18:41   #48794  |  Link
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.ts container? It's not seeking friendly, I can't confirm such an issue with mkv.
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Old 1st February 2018, 18:47   #48795  |  Link
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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.
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Old 1st February 2018, 19:21   #48796  |  Link
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Originally Posted by varekai View Post
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.
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Old 1st February 2018, 20:56   #48797  |  Link
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Quote:
Originally Posted by Asmodian View Post
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
--------------------------
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Old 1st February 2018, 22:16   #48798  |  Link
-Hitman-
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Quote:
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.


Quote:
Originally Posted by mclingo View Post
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)?

Last edited by -Hitman-; 1st February 2018 at 22:19.
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Old 1st February 2018, 22:19   #48799  |  Link
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Did you check CPU load with dxva copy-back?
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Old 1st February 2018, 22:35   #48800  |  Link
mclingo
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[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.
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