I'm working on a stop motion for an art class and we are using imovie as an editing software (ugh, i need final cut). anyways the movie seems shorter than it should be. i mean, 3 fps with 188 pictures? should be 1 minute 2 sec, plus a 21 second intro/title. comes out to be 1: 18 total, and the last image is like the last 20 seconds. any ideas on how to fix it?