I want to programmatically create a Quicktime movie which contains,
say, a
3-minute musical score accompanying a picture. The music itself is
actually
a 5-second loop repeated end-to-end 36 times to make up the 3 mins.
How do I program this?
Just call InsertMediaIntoTrack 36 times.
Furthermore, if I can do the above in QT, how about having 2 similar
audio
tracks playing independently such that a customised player, which I
will
create using the QT API, could allow the user to interact with each,
allowing him/her to eg mute one track, raise the audio level of another
etc?...
You can use SetTrackVolume for this. SetTrackEnabled(false) mutes the
track but restart of playback might be slower than setting the volume
to 0.
How accurate can I hope sync to be: for musical re-mixing, it pretty
much as
to be audio sample accurate - any issues here?
If the tracks get mixed down to the same channel(s) it should be sample
accurate. Else it depends on the hardware I suppose.
Jan.
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