It sounds like frame interpretation issue.
What model of camcorder did your MPEG come from and resolution is it?
When you added this video as the first clip on your timeline, did it have a yellow-orange "render" line over it? A render line is an indication that your project settings do not match your video specs.
Thank you for your quick answer.
The original video was a first export made by premiere on a other project.
I use the current project only to add dvd menu and scene marks
No orange line :
video properties :
(sorry for the french in the screenshot, but I suppose only the values are interesting )
Thank you for your help !
Try right-clicking on the clip(s) on your timeline and, from the Clip sub-menu, select Field Options. On the Field Options panel, check the option to Reverse Field Dominance.
That should do it -- though a lot depends on the specifications of the original MPEG.