QuickTime 4 Reference

The Frame Time Structure

The ICMFrameTime structure is defined as follows:



 
struct ICMFrameTimeRecord {

    Int64Bit                value;          /* time to display frame */

    long                    scale;          /* time scale */

    void                    *base;          /* reference to time base */

    long                    duration;       /* display duration */

    Fixed                   rate;           /* movie's playback rate */

};

Field descriptions

value: Specifies the time at which the frame is to be displayed.
scale: Indicates the units for the frame's display time.
base: Refers to the time base.
duration: Specifies the duration for which the frame is to be displayed. This must be in the same units as specified by the scale field.
rate: Indicates the time base's effective rate.