I've been using Mpeg-2 in Vegas 3.0 to render files for a long time. All of a sudden last night when i went to render a video (.avi files as the source) the end result is extremely choppy with no audio and it crashes windows meadia player. I just used mpeg-2 to render files two days ago and it was fine. Now I can't figure out what the problem is. Mpeg-1 works ok, but i'm putting stuff on DVD so I was using the DVD NTSC setting.

Can anyone help?