From the web site: gtranscode is a GTK+ GUI (graphical use interface) front-end for transcode in order to make this powerful tool easier to use. transcode is a powerful video and audio processing tool that can read in just about any format of video and/or audio and convert to just as many different formats. In addition to transcode’s extremely flexible modular concept for reading/writing different formats and codecs, it can apply filters, do re-sampling, resizing, cropping, and more.

Version 0.1.5 is shipping in April, 2003.

Reader Erin S. raves about gtranscode: Excellent usability, easy to install, and not only supports all the major functions of transcode, but anything it doesn’t support, you can add manually…the most versatile transcode yet!

http://fuzzymonkey.org/newfuzzy/software/gtranscode/