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Old 20th April 2011, 05:54   #1  |  Link
OvejaNegra
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Dxva + mpchc + wmv vs nvidia

How can i use DXVA for VC-1 (on WMV files) on Windows 7 with MPCHC?


I have an nvidia 9800GT and Windows 7. Using mpchc with EVR it plays h264 using dxva without problems.

It cant play MPEG2
It cant play VC-1

As far as i know, it should. In the beginning i just leave it because "maybe" it was MPCHC fault. In fact WMP 11 can play all the WMV files with low cpu use if i enable the checkmark of video acceleration in the perfomance tab.

But yesterday i opened one of those files at my workplace (i have windows xp ,an ATI card and the same version of MPCHC) and surprise, it says DXVA in use and the videos plays very fast, seek fast and dont use allmost any cpu.

What im doing wrong?
I tryed all the renderers on windows 7 and nothing, using the decoder DMOs (it works like that at my workplace) only results in cpu playback, the FFDSHOW VC1 + DXVA does not works, and the internal VC1 filters of WMPHC neither.

How can i use DXVA for VC-1 (on WMV files) on Windows 7 with MPCHC?

That's all, sorry for my english.

PD: Yes, my video card drivers are up to date and my directX runtime is up to date and the WMV files have a VC1 video track (that's what mediainfo says).
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Old 20th April 2011, 06:03   #2  |  Link
edison
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g92 does not support vc-1 vld(dxva2), so you should choice always use dxva if you are using potplayer to enable dxva1 vc-1 decoding.
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Old 20th April 2011, 07:15   #3  |  Link
mindbomb
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you can use lav cuvid for hardware acceleration.
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Old 20th April 2011, 07:54   #4  |  Link
nevcairiel
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The 9800GT only supports partial acceleration of VC-1 content, which the DXVA decoder in MPC-HC does not support.
The MS decoder supports partial acceleration, thats why its faster.

Like it was suggested, you can try my LAV CUVID Decoder, i've been told it does partial acceleration on your hardware, sadly i don't have any card of that generation left to test this.
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Old 20th April 2011, 13:50   #5  |  Link
caaraa
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nvidia 9800GT and Windows 7 is good
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Old 20th April 2011, 15:12   #6  |  Link
mindbomb
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Quote:
Originally Posted by nevcairiel View Post
The 9800GT only supports partial acceleration of VC-1 content, which the DXVA decoder in MPC-HC does not support.
The MS decoder supports partial acceleration, thats why its faster.

Like it was suggested, you can try my LAV CUVID Decoder, i've been told it does partial acceleration on your hardware, sadly i don't have any card of that generation left to test this.
i have a gtx 260, and it does work
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Old 20th April 2011, 22:32   #7  |  Link
OvejaNegra
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"The MS decoder supports partial acceleration, thats why its faster." yes, i have the MS decder working on MPC but its using software, not hardware (high CPU slow seeking and DXVA not showed on the bottom of the player), on the other side, the WMP11 works ok and its using hardware decoding.
"Like it was suggested, you can try my LAV CUVID Decoder, i've been told it does partial acceleration on your hardware, sadly i don't have any card of that generation left to test this"

I will test it.

"i have a gtx 260, and it does work "

two (very) different generation video cards.




"g92 does not support vc-1 vld(dxva2), so you should choice always use dxva if you are using potplayer to enable dxva1 vc-1 decoding"
I'm not using pot player.

The thing that bothers me is that WMP is using DXVA and mpchc not, so when im opening one WMV in had i have to use the windows player, and i love mpchc
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Old 21st April 2011, 05:11   #8  |  Link
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Quote:
Originally Posted by OvejaNegra View Post
"g92 does not support vc-1 vld(dxva2), so you should choice always use dxva if you are using potplayer to enable dxva1 vc-1 decoding"
I'm not using pot player.

The thing that bothers me is that WMP is using DXVA and mpchc not, so when im opening one WMV in had i have to use the windows player, and i love mpchc
Check your renderer. You must use EVR or EVR-cp.
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Old 21st April 2011, 06:07   #9  |  Link
mindbomb
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It's not that, the dxva filters in mpc hc only support full bitstream decoding. the 9800gt only supports h264 full bitstream decoding. So he is gonna get dxva only for h264 with the internal filters.

However, he can easily install lav cuvid, and get hardware acceleration for mpeg 2 and vc-1 in mpc hc. Make sure to disable mpeg 4 asp in lav cuvid, as that isn't supported at any level in a 9800gt.

Last edited by mindbomb; 21st April 2011 at 06:09.
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Old 21st April 2011, 08:08   #10  |  Link
nevcairiel
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Quote:
Originally Posted by OvejaNegra View Post
two (very) different generation video cards.
Well, yes.
But the video decoder in both is exactly the same.

Quote:
Originally Posted by mindbomb View Post
Make sure to disable mpeg 4 asp in lav cuvid, as that isn't supported at any level in a 9800gt.
What exactly happens when you don't disable it? I would've thought it would just, well, not get used.

I should really install my old GTX260 in some system and see what happens.
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Old 21st April 2011, 08:16   #11  |  Link
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iv gotten a black screen when mpeg 4 asp is checked and im using unsupported hardware.
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Old 21st April 2011, 09:00   #12  |  Link
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iv gotten a black screen when mpeg 4 asp is checked and im using unsupported hardware.
Same for me. I need to buy new graphics cards.

I had to uninstall 0.4 though because CPU was going up too high and some videos weren't playing smoothly while MPC decoder and FFmpeg-mt would play them fine. Guess I have to wait for CUVID to mature.
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Old 28th April 2011, 17:40   #13  |  Link
OvejaNegra
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OK:
MPEG2-> Works
ASP-> (black screen)
H264-> OF course
VC1-> well, the advanced profile works, but the high profile does not (both profiles works with DXVA if i use windows media player).
Yes, im using the EVR on windows 7.
MPCHC refuses to use DXVA on windows 7, even if im using the EVR and the microsoft decoders. But it uses DXVA on WXP. I dont understand why.
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