I just used imovie for the first time and I had some mp4 files that I wanted to edit. So I opened up imovie slected mpeg-4 for the format then imported the clip that I wanted to edit. But when I tried to import the clip it said that it was going to take 127 minutes. Is that normal? The clip is 44 minutes long and I have a c2d macbook with 1gb of ram. And the fans were loud and did not stop being loud untill I was done importing.