This is the first mention of the Flix Engine SDK price ( serverside encoding of videofiles to VP6 FLV files with PHP, Java, Python and Perl for Linux and a whole set of other languages on Windows through COM interop ) that i see publicly available online. You want to work on the next Youtube? It'll cost you EURO 3750 for the software...follow the links, especially Flashhosting (dutch) for more information.
Link: FlashHosting (dutch).
Link: On2 Flix Engine SDK for Flash 8 - On2 Technologies.