QuickTime Pro - Cropping Frames and Letterbox
The following free video tutorial shows the basic technique of editing a video clip with QuickTime Pro. First, we set In/Out markers to crop some unnecessary frames. Second, the current aspect ratio is set to 4:3. And we want to change it to 16:9 by putting the actual video in a letterbox.
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Click on the button to download the resource package (Members only, zip file: 25.1 MB). 
Click on the button to watch a sample movie. (A black matte is used.).
QuickTime is a product of Apple, Inc.
The original MPEG-2 clip comes from Internet Archive.
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