It'll convert files between media formats, giving you a great deal of control over the output. So, for example, if you have a file that you'd like to convert so it can be played on a portable media player, MediaCoder will do the trick.
It can also save you plenty of hard disk space by shrinking media files. There are also lots of extensions you can download that expand the program?s abilities, such as make it easy to transcode files for specific media players.
Note: this version may or may not play in Vista. Author requests bug reports. --Preston Gralla