Video loop cutter/encoder utility

I made this at Andrew Benson's suggestion, but thought I might share here instead of just on twitter.
I've compiled the thing as an osx app on my site, which can be found here: http://andrewlb.com/project/code-sharing/

Here's the source. There's a bug that I come across sometimes where a few frames are copied from the end of the looppoint onto the front of the encoded video. Not sure why this happens, but any help would be appreciated. Anyway, thank you and hope this comes in handy~ Very quick and dirty patch, but I was able to cut and encode about 60 loops in around 30min, which ain't bad~