My Quartz Composer article might be one route, but it's limited to
static images that are premade as qtz movies. I suspect what you
probably really want is the ability to add a matte track to a movie,
so you can draw on that track and see the other movie track behind
it. Perhaps this could be accomplished with the QT API SetTrackMatte
function. This will involve some heavy lifting via declares or a
plugin. I believe MBS has this functionality already. Unless you're a
QuickTime and Declare/plugin whiz, it's almost certainly a cheaper
route than writing your own solution.(it involves GraphPtrs and other
goodies that aren't always so fun to deal with in RB). Not to
dissuade you from trying though. It can be done, but it's a lot of
work. Another option you have in QuickTime would be to create a
sprite track and turn on transparency. Thirdly, you could investifate
skinned movie tracks, as they also permit transparency. QuickTime is
pretty vast and many tasks can be accomplished in multiple ways, but
it's not built in.
Erick
On Mar 27, 2006, at 6:07 PM, James Mullins wrote:
Check out issue 4.2
http://www.rbdeveloper.com/browse/4.2/4209/
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