Programmatically triggering custom preview function in Image Acquisition Toolkit

Question

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I've written a custom preview function to do some requisite image processing on the preview frames acquired from my video source while acquiring the raw (unprocessed) frames, and the whole thing is inside a user interface app that I've created with appdesigner.

I have saved off my acquried frames as a .mat file,. and now I would like to playback my acquired imagery through my app so that I can tweak my image processing function and validate some of my app's features using my acquired data.

Is there a way to either create a video source from my saved imagery or otherwise trigger preview events manually in a for loop from my loaded imagery back through my app?

Thanks,