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Jason Snell for Macworld
September 20, 2017 8:10 PM PT
Up until now, iOS devices have captured video in the MPEG-4/H.264 format, and still photos in JPEG. But with iOS 11 (on recent hardware), Apple is breaking with tradition and switching to a new set of formats that promise dramatic decreases in file size—albeit at the cost of some added complexity in terms of file compatibility.