I've got an HTPC running a dual DVB-s2 sat card, Intel Core 2 Duo at 2.16Ghz and an ATi Radeon HD5450. I've managed to get sky decoding through the system and SD plays fine through media centre 7, no stutter at all... However as soon as I switch to an HD feed it goes nuts and slows to a crawl, pixelates the screen, stutters and the audio doesn't sync with the picture.
Has anyone else suffered this at all? Any workarounds?
Also, it seems that the card through Oscam does the decoding work and takes about 0.15s to do this but the channel change in media centre takes several seconds...