Live TV H264 1080i deinterlacing problem (1 Viewer)

[Hivanoe]

MediaPortal Version: 1.1.1
MediaPortal Skin: blue3 wide
Windows Version: Vista SP2
CPU Type: Athlon II X4 605e
HDD: WD 1.5 TB EARS Green
Memory: 2x1GB DDR2 800
Motherboard: asus m2a-vm hdmi
Video Card: IGP Ati X1250
Video Card Driver: 10.2
Sound Card: embedded on chipset
Sound Card AC3: AC3 coaxial out (passthrough)
Sound Card Driver:
1. TV Card: Hauppauge HVR-4000
1. TV Card Type: DVB-S DVB-T Analog
1. TV Card Driver:
2. TV Card:
2. TV Card Type:
2. TV Card Driver:
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec: Ati
MPEG2 Audio Codec: Microsoft
h.264 Video Codec: ffdshow (saf 5.00)
Satelite/CableTV Provider: Hotbird 13°E fta
HTPC Case: thermaltake mozard sx
Cooling:
Power Supply:
Remote: imon pad
TV: Panasonic Viera 37" Plasma 720p
TV - HTPC Connection: HDMI

Hello all,
I have no problems in general with playing video or watching TV, except watching interlaced Live HDTV
VGA resolution is 1280x720 50p

The TV signal is 1080i 25Hz so it must be rendered as 50Hz when deinterlaced to look smooth !
Also SD (DVD or TV) work in this mode, and it looks smooth without problems.

With H264, almost all codecs in MP (PDVD DivX FFDShow WinTV7 HD Codec) deinterlace the HD stream into 25p, and so the video is not smooth (but regular).
The only combination to get 50Hz is FFDShow with the option "Set interlace flag in output media type (Auto) (Auto)" activated. (No deinterlacing done in FFDShow, so it's deinterlaced by EVR/Video_Driver)
In this mode the video looks good, well deinterlaced and as smooth as SD TV but I have lots of frame drops so it frequently stutters.
EVR cannot play the 50 fps, it moves between 35 - 45 (seen with EVR info of FFDshow)
CPU usage is always below 40-50% with H264

I have now SAF5 but with SAF4 nothing changes.

I know my old video chipset is not the "recommended" but it's able to play HD content with other software configuration !
What can I do ?

Below MP log files.

Regards

 

[Hivanoe]

Disabling Vista AERO I can play 1080i very smooth at 50fps (Renderer is still EVR in MP).
but I suffer now from tearing ... and this is normal with aero off reading the very good stutter-free playback guide !
activating v-sync in 3d setting of videocard does not help, I think it works with XP.
It seems definitely the EVR that consumes lots of GPU/Bandwidth resource (that are limited in my hw)

Is it possible to fix just v-syng and leave AERO off ??

Is there someone that can play 1080i 50fps with X1250 Chipset in MP ?