Apple has updated iMovie for iOS with a whole bunch of new features. The key among these is the support to key out or remove the background for a subject placed in front of a green screen. A green or blue screen is used when you intend to remove the background of a subject in a video and replace it with something else during post production. It is usually used to replace the background of weathermen and replaced with the map of the area whose weather they are reporting. These days it is most commonly used in films, where the background is replaced with CGI and it's how a lot of films and...
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