If you really really really need to do this you can make a series of
small mini compositions that encapsulate each operation you may want
to do and published each with inputs and outputs and connect them
programatically via setting an input key of one QCRenderer with the
value of an outputKey of another. For speed, you can use
[someQCRenderer setValue:[someOtherQCRenderer
valueForOutputKey:@"myPublishedOutputImage" ofType:@"QCImage"]
forInputKey:@"myPublishedInputImage"];
So you would have someQCRender which has a loaded comp that has a
published image input "myPublishedInputImage" and set it to the
published image port from someOtherQCrenderer with a comp that has an
output image named "myPublishedOutputImage".
What you end up doing is similar to core image units, but they are
more flexible because you can load the QCRenderer with a QCComposition
that outputs not just images but multiple images, numbers, arrays, etc.
On Aug 17, 2009, at 10:09 PM, Don Atkins wrote:
I'm working on my first mac application which will be a video
analysis tool. I want to use QC but I need to build compositions on
the fly. Basically I want to duplicate fun house but with video.
I've dug through the manuals, this list, and the API. The
Composition Loader looked promising but I didn't see anyway to make
the connections without direct interaction. The last resort is to
build .qtz file direct but I'm hoping I'm missing something.
Thanks,
Don
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