High GPU load with EVR+DXVA (2 Viewers)

[Owlsroost]

TV-Server Version: RC3 SVN 20602
MediaPortal Version: RC3 SVN 20602
MediaPortal Skin: Blue 2 wide
Windows Version: Vista Home Basic SP1
CPU Type: Intel E4500
HDD: 500GB
Memory: 2GB
Motherboard: Dell Vostro 200SL
Video Card: Club3D (ATi) HD3450
Video Card Driver: Cat 8.5
Sound Card: Realtek HD 7.1 codec
Sound Card AC3:
Sound Card Driver: R2.04
1. TV Card: Kworld DVB-T 399U
1. TV Card Type: DVB-T
1. TV Card Driver: V8.4.28.1
2. TV Card:
2. TV Card Type:
2. TV Card Driver:
3. TV Card:
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3. TV Card Driver:
4. TV Card:
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MPEG2 Video Codec: PDVD8
MPEG2 Audio Codec: AC3Filter/DScaler
h.264 Video Codec: MPC-HC
Satelite/CableTV Provider:
HTPC Case:
Cooling:
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Remote:
TV: Panasonic TX37LZD80 @1920x1080p
TV - HTPC Connection: HDMI

Hi,

I've been trying out MP for a few weeks - generally very impressed.

The problem I'm getting is that when using the EVR renderer with DXVA I'm getting very high GPU load when playing interlaced content - up to 90% when playing 1440x1080i MPEG2 in a window covering most of the 1920x1080 screen. This results in stuttering and tearing. It's better in fullscreen mode, but I still get tearing at times so I suspect it's still generating a high GPU load.

If I stop the video (so it's just a static MP screen) the GPU load is still about 30% - so is MP constantly re-drawing the window contents even when nothing is changing ? - and does it still do this when playing video in fullscreen mode ?

I know that the video card (ATi HD3450) is performing hardware deinterlacing (the main reason for using DXVA in my case), but playing the same files in MPC-HC player with the same codecs and EVR rendering the maximum GPU load is about 50% - so no stuttering/tearing.

If I switch to VMR9, the GPU load drops noticably so that the stuttering/tearing goes away, but then it can't use DXVA2 so it's impossible to get hardware accelerated H264 decoding....

(I know that I could improve this by upgrading the video card, but it's a slimline PC case that only takes low-profile cards so it's difficult.....)

I suspect this issue is related to the one raised in this thread - https://forum.team-mediaportal.com/codecs-external-players-55/mediaportal-uses-evr-3-input-pins-drops-50-all-frames-interlaced-stuff-43627/

Any suggestions or comments ?

Tony

 

[ichessblumen]

.....

(I know that I could improve this by upgrading the video card, but it's a slimline PC case that only takes low-profile cards so it's difficult.....)

....

Tony

Hi Tony,

dunno where to find this HD3650 low profile from sapphire in the Kingdom....
Maybe that helps you out better than fiddling with EVR and VMR

greets.
ieb

 

[Owlsroost]

Hi Ieb,

Thanks for the suggestion, but I can't find the card for sale in the UK so far...

If I upgrade the video card I might go for one of the new low-profile HD4350 or HD4550 cards - these have 80 stream processors (twice as many as the 3450) and 7.1 HDMI audio support. The downside is that then I'll be on the cutting-edge of ATi driver releases - not sure if I want to go there at the moment

Tony