(Instructions for use:
MPEG-IV Termination Source Code (XViD)
XviD is the latest MPEG-4 codec, and is the first truly open source, and will be released under the GPL agreement once it is finalized. In a recent codec comparison, I found that XviD performed surprisingly well, although not quite as good in the alpha version. If being a beta tester doesn't scare you, XviD might be just what you need.)