From NCH Software:
Prism is a video file converter for Mac OS X. It can convert many different types of video files into avi, mov, 3gp and more. Prism video conversion software for Mac is very easy to use. Just add the files you want to convert to the list, select the format you want to use, and then click the convert button. Batch convert thousands of video files at once. Preview output files before converting. Add video files directly from DVDs. Set compression/encoder rates of output files. Set resolution and frame rate of output files. Prism can be added to your right click menu for easy access.