TrackAt
virtual BTrack * TrackAt(int32 index, int32 seekMode = 0,
BMediaTrack* TrackAt(int32 index);
BMediaTrack *track = file.TrackAt(i);
BMediaTrack* track = fMediaFile->TrackAt(i);
BMediaTrack* inTrack = inFile->TrackAt(i);
track = file->TrackAt(i);
return mediaFile.TrackAt(0)->Duration();
fDuration = mediaFile.TrackAt(0)->Duration();
BMediaTrack* track = mediaFile->TrackAt(i);
BMediaTrack * track = fPlayFile->TrackAt(ix);
BMediaTrack* track = playFile->TrackAt(i);
fAudioStream->stream = fAudioStream->file->TrackAt(0);
BMediaTrack* audioStream = file.TrackAt(0);
track = media->TrackAt(trackNum);
track = fMediaFile->TrackAt(tr);
BMediaTrack* track = fPlayFile->TrackAt(i);
BMediaTrack *mediaTrack = mediaFile.TrackAt(0);
BMediaTrack* mediaTrack = fMediaFile->TrackAt(i);
track = mf->TrackAt(i);
BMediaTrack * track = playFile->TrackAt(ix);