QuickTime 4 Reference

Adding the tween sample to the media and the media to the track

Listing 3 Adding the tween sample to the media and the media to the track



 
// add the sample to the tween media

BeginMediaEdits (md);

AddMediaSample (md, container, 0,

    GetHandleSize(container), kSampleDuration, desc, 1, 0, nil);

EndMediaEdits(md);



// dispose of the sample description handle and the atom container

DisposeHandle ((Handle)desc);

QTDisposeAtomContainer(container);



// add the media to the track

InsertMediaIntoTrack(t, 0, 0, kSampleDuration, kFix1);

Once you have added the tween media to its track, you need to call the AddTrackReference function to create a link between the tween track to the receiving track. AddTrackReference returns the index of the reference it creates.

The sample code shown in Listing 4 retrieves the sound track from a movie and calls AddTrackReference to create a link between the tween track (t ) and the sound track. The reference index is returned in the parameter referenceIndex .