Hello! when i try to render a video in sony vegas at "Internet 1080 HD" i getting video lag in the preview window and in the video when its finished rendering! the video recording is from battlefield 3 gameplay and when i see in the orginal video its no lag! my computer is powerfull so i dont know why! i have intel i7 and Nvidia GTX680 so i dont understand the problem, maby rendering errors? please help!