QTVideoTrack.AppendVideoTrackSegment
From Real Software Documentation
Method
QTVideoTrack.AppendVideoTrackSegment ( SourceTrack As QTVideoTrack, SourcePosition As Double, SourceDuration As Double, CopyMedia As Boolean, ShowProgress As Boolean )
Appends a segment from SourceTrack to the calling QTVideoTrack.
SourcePosition is the starting point of the segment (seconds) in SourceTrack and SourceDuration is the length (seconds) of the segment.
If CopyMedia is True, the media in SourceTrack will be copied to the destination track; otherwise a reference to SourceTrack will be used.
If ShowProgress is True and the operation is lengthy, QuickTime will display a modal dialog box with a progress indicator as the operation proceeds.
