Does anyone have any ideas about the following?
When watching movies/TV through the PC, the frames are tearing. It's not noticable for relatively static images (eg two people standing talking) but when any significant movement (eg someone walking across the shot) results in tearing across the middle of the display.
This happens whether watching live TV via DVB-S (GBPVR), or playing back an AVI or MP4 file (Windows Media Player, or Quicktime), so it doesn't seem to be related to a single input source or codec (ffdshow installed).
The PC is running at 1360*768 resolution, 60Hz refresh rate. It's a Celeron 2400 with the onboard Intel video, so we're talking low-end vid card and CPU here. ~75% CPU when watching DVB-S transmissions.
DVD movies from a PS2 are fine, as are games from the PS2 and Wii (all composite inputs). The hardware decoder on the PVR-350 was also fine (via SageTV, also composite). It's a Pioneer plasma, seventh generation (eg the one before the new Kuro line came out) so I'd assume the TV isn't the problem.
Time for a better video card perhaps? Or time for an entirely new HTPC?