a8a67062_CCforFlashAS3_Help__Description
[Property] captFrRate:Number [Notes] Frames per second. Used to synchronize animated objects (i.e. movieclips) to timed captions. This is the frame rate used to determine the timecodes entered in the caption file, not the frame rate of the Flash movie at run-time. [Description] 
Frame rate (for Flash MovieClip Objects)
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Description