Indicates that two or more calls to frameImageAtTime:withAttributes:error: will be made on the same QTMovie object.

By adding this key with the associated value that is an NSNumber wrapping the BOOLYES to the dictionary of attributes, an application indicates that it will make more than one call to frameImageAtTime:withAttributes:error: on the same QTMovie object. This knowledge permits QTMovie to cache certain objects and data structures used to generate a frame image, thereby improving performance. When the caller has obtained all the frame images desired from a given QTMovie object, the caller should follow those session calls with a call where this value is NO; this is a signal to QTMovie to dispose of that cached data.

Declared in QTMovie.h.

Mac OS X v10.6; QuickTime 7.6.3 and later.