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I use iMovie version 10 but it this feature should be compatible. Drag them all to the Timeline. Press CTL+A to select them all or shift+select to select the ones you want. Then click on the crop button Press fit that's it


iMovie as of today (Jan 2015) only lets you create an app preview export at 1920 x 1080, which while great for the iPhone 6+ is useless for creating all the other sizes and aspect ratios needed. I had to bite the bullet and buy FCPX, this allowed me to export at all the resolutions and easily mod the aspect ratio's of the imported raw video.


I would suggest you use this Training video to learn how to use iMovie. iMovie 10.0.2 Essential Training with Garrick Chow The intro is free so you can then decide if you want to pay for full training.


In short, you (often) need to include the argument -pix_fmt yuv420p when using ffmpeg to generate H.264 content for Apple software/devices, and a bunch of other decoders that don't handle yuv444p. # ffmpeg -i input.avi -pix_fmt yuv420p output.mp4 This is not mentioned in the output when using the defaults, but can be found in their Encode/H.264 guide. It ...

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