Hello. I installed VLC media player a long time ago because I heard it was a good player. I recently tried to use it because someone on this forum told me to use it to get good screenshots. When I tried playing an mpeg, it was just green lines, with pink spots, and a black background for the video, and audio was fine. I uninstalled it, and then reinstalled VLC. It worked fine after I reinstalled it. Since then, I think I installed Logitech's QuickCam Pro software. Now when I try to use VLC, it has the same problems of having no video and just audio. I tried uninstalling it and reinstalling it again, but it didn't fix the problem this time. I get no video, and just audio. Any ideas?

Edited,
Ok now for some reason it is working which is good, but I don't know why and what the problem with it not working and working is....