AV Foundation and Core Media
This recipe requires access to two very specialized modules. The AV Foundation module provides an Objective-C interface that supports media processing. Core Media uses a low-level C interface to describe media properties. Together these provide an iOS version of the Mac’s QuickTime media experience. Import both modules in your source file for this recipe.
Recipe 8-5 begins by recovering the media URL from the image picker’s info dictionary. This URL points to the temporary file in the sandbox created by the image picker. The recipe creates a new AV asset URL from that. Next, it creates the export range, the times within the video that should be saved to the library. It does this by using the Core Media CMTimeRange ...
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