Hi,
i just want to say, that i have the same problem. I am fighting against this issue since month. Researches on the web and many invested time did not help solve the problems.
I have a Core I7 930 CPU, Ati HD5770 Graphics Card, Win7 pro 64 Bit System. I use to see videos over a HD Beamer.
The main problem is, that videos partly depending on the video container and codec in most cases are choppy. Real HD videos are one big problem.
Another problems are simple dvds: I remember on older versions of vlc dvds were most choppy. Now i have problems (vlc 1.1.
that the video seems to be pixellated. ( not sure about the correct naming of the problem). I happens only with the vlc, even on other systems with the same vlc version it seems to work.
The difference there is just another graphics card, as i can see for now. It does also not depend on the container, i tried originally dvd, remuxed as mpg and mkv file. Always pixellated.
Other players don't also have those problems, like for example PowerDVD. On the other hand of course, are there so many advantages and features of vlc, that i cannot and don't want to use any other player. VLC is really nearly perfect, just the issue with the videoquality.
On my old xp system i did not have problems like this, too.
The driver of my graphics card is the most recent of course, too. I am looking every day and hope to find newer ones.
Maybe, there is anyone there outside, who has an idea about this!! i am wondering, why i am abviously nearly the only one, having those problems!