The VideoLAN Forums

its just a minor problem. when I'm set in dualview on nvidia i can move the movie from one monitor to the other. when I put it on the 2nd monitor and make it fullscreen, it plays fine. but I get violent horizontal cuts while watching the movie. mostly during fast motions. just like if your playing a game with vsync off. ive tried Directx, Directx 3D, and OpenGL with the same problem. any ideas?

This could be the video overlays and/or DirectX drivers. Enable video overlays (Preferences > Video > Overlay video output), this should get rid of the horizontal lines. If the problem still exist then check out those DirectX driver from Microsoft.