How do I fix jitter?

[Tyler2000]

I have a dvd that I created with Pinnacle Studio 8. I used DGIndex to convert a section of the dvd into an avi. The problem is when I load the required .avs file into virtualdub and save the avi, the video has very bad 'jitter'. At least I think it is what you would call jitter. What program can I use to fix it or how do I prevent it from happening? My video is NTSC 29.97 interlaced if that helps answer my question.

[lenti_75]

use Ulead products to save the dvd files...no jerking.

I don' tknow if there is anything you can do once the damage it's been done....