Isn't this what Quartz Composer Visualizer.app is for?
Also I'm not a multi-screen user but it's easy to send signals (triggers)
from one QC composition to another via OSC (across network). Think OSC are
stock patches but there is discussion on kineme.net about using them.
Getting the OSC on a qtz inside Keynote I can't testifie to having done //
As you would know Keynote doesn't bind keystrokes and mouse inputs, grrrr…
and may block OSC try it and see... could be a work around  to the
Keynote-as-QC-host ptroblems I've had com to think of it.

2009/9/15 Michael Sime <[email protected]>

> or am I just a moron who can't figure it out for himself....
>
> I use a variety of packages to make screen imagery for movies & tv
> shows....director, flash, keynote(!!) FCP, af/x & the like....anything from
> a web page to a email to a news program to, well, just about anything you
> might see on a computer screen or a TV...yeah, I'm the guy that allows he
> cops to zoom in on a license plate from 2 blocks away  with a camera in an
> ATM...we also did this ( & got some geek flack for it)
>
> http://www.engadget.com/2009/02/27/screen-grabs-ugly-betty-meets-mutant-laptop/
>
> one overriding factor in creating stuff for computer screens is that
> whatever plays, must play full-full screen (no menu bar or windows of any
> kind)
>
> ergo, we use keynote (a lot) to make full-screen 'desktops' & whatnot,
> showing whatever it is the actor is pretending to do....
>
> so here's where QC comes into play & the reason for my question after
> lurking for awhile....
>
> we created a QC program to simply take a video stream from the firewire
> input & make it float over a 'desktop'....basically making a 'iChat', but
> without the iChat interface (see link above)...we also use it to simulate a
> photographer feeding a photoshop-esque-type screen with a live feed from a
> digital still camera....
>
> this worked like a charm in Tiger, but seems to have died in Leopard
>
> perplexing to say the least...dunno if we missed a memo or are just missing
> some no hook or somesuch
>
> any ideas from this esteemed group?
>
> and while we're at it, what would REALLY make my entire week, wold be if
> someone could explain to me why the live input gag saved a quicktime won't
> work once embedded into a keynote...cuz if I could get THAT to work it would
> be just, just, just....really, really cool
>
> Thanks in advance
>
> Mike
> ---------------------------------------------------------------
> Michael Sime      <[email protected]>
> Video Schmideo!  <www.videoschmideo.com>
> Visual Alchemy, LLC <www.visualalchemy.tv>
> ---------------------------------------------------------------
> It's not the time it takes to take the takes,
> it's the time it takes BETWEEN the takes,
> that takes the time to take the takes.
> ---------------------------------------------------------------
>
>
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