Slow playback in internal player (1 Viewer)

[costi]

MediaPortal Version: 1.1 RC6
MediaPortal Skin: Black Glass Nova
Windows Version: Win7 Home Premium x64
CPU Type: Intel Atom 330 1.6GHz
HDD: 160GB 2.5" SATA2 5400rpm
Memory: 2x1GB DDR2-800
Motherboard: n/a
Video Card: nvidia ION
Video Card Driver: 257.21
Sound Card: Realtek HD Audio
Sound Card AC3: stereo analog out
MPEG2 Video Codec: MPC
MPEG2 Audio Codec: MPC
h.264 Video Codec: CoreAVC
HTPC Case: Acer Aspire Revo 3610
Remote: X10 OR22V
TV - HTPC Connection: D-Sub

I have a problem with the internal player: no matter what codecs I use (tried SAF v4, SAF v5 and now CoreAVC) HD playback using the internal player is choppy as hell right from the start, making the movie unwatchable. It looks as if DXVA is not initialized properly.
When played in Media Player Classic HomeCinema, everything is fine. If MPC-HC is set as the external player in MP Configuration, playback is also flawless.

I included logs from the last run when I start MP, go to MyAnime2 plugin, scroll down to "Sky Crawlers", play about 20 seconds of the movie, press Stop and quit MP.
Yes, I am aware that Direct VobSub is missing.

Is there a way to achieve smooth playback with MP internal player?

 

[hoborg]

Install SAF 5 and try again (send new LOGs).

 

[costi]

Installed latest SVN build of SAF (tho not without problems, it desperately tried to write to my SysWOW64 dir), and the situation is the same, tho I think the problem is with the MyAnime2 plugin and not MP in general, because 720p videos in Moving Pictures play fine. I'll have to check that before I post logs.

BTW. is there a way to see what filters are used during playback? GraphStudio, which is included with SAF, does the job, but I don't know how to set it up to render a graph of a file played in MP. Can anyone help?

 

[costi]

Scratch the above, 1080p is unplayable in MovingPictures as well. I'll post logs tomorrow.

BTW. can my problems be caused by using a 64-bit OS? SAF shows during installation that my OS is unsupported...