Kirk, I think Nancy wants to just take a frame from her video every minute or so, so that the 45 minute video runs for, say, 45 seconds.
I don't think she wants to "speed it up" and make it run at breakneck speed, but wants to put together frames taken at a particular interval ..e.g; one frame per minute.
I'm sure you know how best to do that using QuickTime. Any suggestions?
(..Otherwise, Nancy, choose a point in your video - using iMovie - about one minute into the video and then use 'Create Still Frame' (or Shift
Apple'S') and make the new still frame just a few moments long ..repeat through your 45 minute movie. Drag all those 45 stills together and you have a time-lapse movie. You could make each of them one-and-a-half seconds long, and apply a half-second Cross Dissolve between each of them. You'd then have a less "stuttery" and smoother time-lapse video..)