amfIMarker GetInitialFrameIndex
Gets the index of the initial frame for which the marker is being tracked.
Syntax
marker_handle GetInitialFrameIndex
Description
Returns the frame number at which the marker will begin to be tracked during the tracking calculation. The default value of the initial frame index is 0.
Examples
marker_handle GetInitialFrameIndexErrors
3 = HW_InvalidHandle
        Note: A return value of -1 is not an error code in this case, as -1 is the
                    default value for the final frame (see above).