Okay, I recorded a video with FRAPS and set it to half size, so a big black frame around it appears. I try cropping the frame off, but this is what happens: Note: The text I write talks about the picture above it.
Original, before editing
Trying to use Zoom.
Croping left side by 25%, and top by 25%.
How I edited the video.
As you can see, it appears the black frame is like a seperate layer and when I try to zoom it has no effect on the frame while the center expands. When I uncheck the zoom option it crops the center part, not the black frame.