Fastest way to split a video file into two?

Does anyone know of software for OS X that can quickly split a 2 hour H.264 video file into two 1 hour files? iMovie estimates 2 hours just to import the file. I was hoping for something that could do it quicker.

You might also be able to do this using Quicktime X. Open the movie, then choose Edit -> Trim... Trim away the second part of the movie file and do a save as to get the first part in a separate file. Re-open the original file and trim away the first part, save as to get the second part in a separate file.

I've only been able to try it with a 5 minute long movie, which was quick enough, but I'm unsure of how quickly it'll work with a 2 hour movie.

The easiest tool would probably be Quicktime 7 Pro. I believe it is available on Apple's store for $30.

If you prefer a CLI method, take a look at mp4box. It has a -split option that does what you're describing.