Uses a very non-optimized way to generate the JPEG. This is the way it was done in 2007, but now there's a built-in JPEG compression function in the API availab

Uses a very non-optimized way to generate the JPEG. This is the way it was done in 2007, but now there's a built-in JPEG compression function in the API available. He's using Adobe's example AS3 JPEG code.