Sample code? Specifically, I want to have composition A playing in a
window on the main screen, and composition B playing (in a NSView or
QCrenderer, I don't care) on the 2nd screen. I want to forward an
output image port from comp. A to an input port on comp. B. If
anyone has a code snippet for such port-forwarding, I'd be very
grateful! thx!
-mike
On Mar 20, 2008, at 11:12 AM, Troy Koelling wrote:
No, it shouldn't be hard, but hardness is usually gauged by
experience and I don't know how much you have.
You might want to subclass the QCView and override
renderAtTime:arguments: for the quickest to implement (but least
elegant) way to transfer the values from one composition to the
other. There may be a performance hit, so this would be best if the
values can be signal type events that only call setValue:
forInputKey: when the value has actually changed. This would mean
video paths and play/pause events rather than continuous alpha values.
The cleaner solution is to use a Patch Controller object, add an
observer to the output keypath and change the values of the second
composition only when they change on the first. Whenever I introduce
bindings into one of my projects it always takes longer than I hoped
so only venture here if you have experience with bindings.
Have you also considered the Network Broadcaster/Receiver patches to
communicate?
On Mar 20, 2008, at 12:28 AM, neb wrote:
I've built two compositions, one a clip selection and interface
tool, and the other a video rendering mixer. The rendering mixer
needs to use full-screen on a second monitor, with the control
interface windowed or maximized on the main screen.
Will I be able to get these to run at the same time and "speak" to
each other through published inputs/outputs without much (any) hard
programming, or will I need to combine them into one patch to split
across the two screens? I've tried using quartz composer
visualizer, and found out too late that the interface composition
doesn't count as a "dedicated processing composition".
I hate to say this but it's fairly imperative I figure out how to
do this tomorrow morning, I've got a deadline that's about to hit
me in the forehead. If they have to be merged into a single
composition, it's doable but messy as I don't know what the
resolution or video mode support of the projector is.
Thanks a million in advance for any help!
-Neb
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