Major video problems when exported/previewed

[greging]

Hi,

The last project i made with premiere was fine - the video exported was perfectly what i wanted.

However, i can no longer export video in any format which has a smooth, consistant frame rate. Also, when i drag a clip onto the timeline, the preview of it (unrendered) will run as if the timeline has been jumbled up.

Please could someone give me some advice/ideas to how i can solve this, as it makes working on a video project impossible.

Thanks - Greg.

[greging]

I found out that the mpgs i was importing (and only those mpgs) have this problem, i tried out some other clips and they work fine - so atleast now i know what the actual problem i have is, and if i cant solve that - i can work around it by converting the clips i need to use before importing into premiere.