Technical Q&As
QTW 19 - QuickTime for Windows API & Overlaying Sound Effects (1-May-95)
Q My application allows users to overlay sound effects on a long sound track
while the track is played back. To accomplish this, I use two sound tracks in a
movie -- one with the long sound track and the other with the short sound
effects. I use InsertTrackSegment, DeleteTrackSegment, and
InsertEmptyTrackSegment calls to implement these functions in my application.
Are these calls supported on QuickTime 2.0 for Windows, and can I successfully
play back a movie with two sound tracks using QuickTime 2.0 for Windows?
A The QuickTime 2.0 Software Development Kit for Macintosh & WindowsCD, which is
available from APDA (800/282-2732), includes version 2.0.1 of QuickTime for
Windows and all the supporting API documentation.
Although QuickTime for Windows version 2.0.1 supports multiple sound tracks, it
allows only one track to be active at a time, because Windows 3.1 does not
support mixing of sound tracks. The InsertTrackSegment, DeleteTrackSegment, and
InsertEmptyTrackSegment calls are not included in the QuickTime for Windows
2.0.1 API.
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