PUBLIC DOMAIN LICENSE: Stanford University Portable Video Research Group.
If you use this software, you agree to the following:

This program package is purely experimental, and is licensed "as is". Permission
is granted to use, modify, and distribute this program without charge for any
purpose, provided this license/disclaimer notice appears in the copies. No
warranty or maintenance is given, either expressed or implied. In no event shall
the author(s) be liable to you or a third party for any special, incidental,
consequential, or other damages, arising out of the use or inability to use the
program for any purpose (or the loss of data), even if we have been advised of
such possibilities. Any public reference or advertisement of this source code
should refer to it as the Portable Video Research Group (PVRG).