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Recording separate audio+video, then syncing the two



Hi,
I'm recording audio via AudioQueueManager, and video through
QTCaptureDecompressedVideoOutput -> ICMCompressionSession.
I'd then like to composite both streams into a single movie file, but
am having trouble getting them exactly sync'd.  I've been trying to
record the start times of both streams and comparing them to get an
offset, but it never seems quite right.

Can anyone offer any suggestions for getting them perfectly matched?

Cheers,
Jon
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