From NCH Software:

Prism is a video file converter for Windows. It can convert video files from avi, mpg, vob, wmv (Windows Media Video formats) and more into avi, asf or wmv files. Prism Video Converter is very easy to use.

Just add the files you want to convert to the list, select the format you want to use, and click the convert button. Video converter features: Converts avi, mpg, vob, asf, wmv, mp4, ogm and all video formats that have a DirectShow based codec. If you can play the video file using ‘Windows Media Player’, you can convert it using Prism. Supports all of the popular multimedia devices including PSP, iPod, MP4 players and mobile phones. Batch convert thousands of video files at once. Preview video output before converting. Add video files directly from DVDs to be converted. Set compression/encoder rates of output files. Set resolution and frame rate of output files. Integrates with Express Burn Plus to record your video files to DVD. Prism can be added to your right click menu for easy access. Intuitive and easy to use interface.