Novice; quickest way to demo this technique on both Mac and Windows

Novice question- I need to demo this difference keying effect ASAP to see how well it works. Difference keying live webcam video

What is the quickest way to compile and test on both the Mac and the PC?

The code is in the post – so the easiest way might be to open an example project (examples/emptyExample, for instance) and paste the code into the example and run it …

I DID say I was a C++ novice:) Didn’t realize that example represented the entire code to compile.