As Yippi writes:
You can get the GStreamer MP3 Fluendo plugin legally and for free from
the FLuendo webstore:
http://shop.fluendo.com/
Even though Sun has a license to distribute Solaris with MP3 decoder
technologies, we do not ship the GStreamer MP3 decoder plugin with
Solaris. This is because some GStreamer-based media programs included
in Solaris are GPL. Nobody can distribute GPL programs with non-GPL
compatible code (such as MP3 decoder logic). It is a violation of the
GPL license unless the GPL program has an exception clause that allows
you to do this.
