Choosing an iMovie aspect ratio and size


macrumors newbie
Original poster
Sep 3, 2015
I'm importing old 640x480 (4:3) videos into iMovie (10.1.14). When I place these files into the Timeline, the Project window is 16:9 (cutting off top and bottom of videos) and the finalized project is saved at 1280x720.

How can I set the project aspect ratio (in this case we need 4:3), or the finalized project size, (in this case I'd like to keep at 640x480, but may later chose to go 960x720 or 1280x960, depending on quality of video, if possible).

It's important that I preserve the aspect ratio since these are old medical videos. I'd like to avoid pillarboxing if I can.

Dave Braine

macrumors 68040
Mar 19, 2008
Warrington, UK
Select your clip(s) in the Timeline. Then click on the Crop tool above the viewer, and then select "Fit". That will show the entire clip, but with vertical black bars on either side.

You won't be able to avoid pillar boxing, as iMovie only does 16:9 videos.