Limit Point Software has updated AddMovie (http://www.limit-point.com/Utilities/AddMovie.html), a tool for combining multiple movies or images into a single movie and batch exporting movies to any format supported by QuickTime, to version 1.9. It combines multiple movies into a single movie and batch exporting movies to any format supported by QuickTime.

AddMovie is a utility for concatenating several files into one single movie, or batch converting movies to other formats. It supports all formats provided by Quicktime. Since the output format is configurable, you can also use AddMovie to convert movie file formats, say from MPEG-4 to 3GP for display on your Bluetooth phone, etc,

It requires Mac OS X 10.4 or higher. It’s donationware. Try it and if you use it, donate to the developers so they can continue working on this and other Mac products.