Hi, I had a question regarding editing on Sony Vegas Pro 9.0 (64-bit).

I have no problem when editing with only one video track at a time, however, when I create any additional tracks that have a video overlapping times with another video, the playback (not just the pre-render, but also the post-render video) skips frames and it gets really choppy.

i.e. if I try to add multiple screens of video at the same time, all of the videos that I added start getting really choppy.

However, if I just have one video track at a time, it plays smooth and without problem.

I tried messing with the properties of the project itself, but it didn't seem to help. It's really frustrating, can someone help?

Thank you!