Frames turn out smaller after turning a slideshow into a movie

I’ve used some full-sized frames from the frame-pack. So the frame in on the outside of the picture, just at the edges of the screen. When I convert the slideshow into a movie e.g. a standard Quicktime movie, the frame turns out small, in the middle of my screen, about 1 fifth of the screen. Any clues on how I can fix this? Thanks!

I guess this is a matter of aspect ratio of you slideshow and when you export it to a QuickTime movie. Maybe your settings for the sildeshow says 16:10 and the QuickTime export says 16:9?