JMF is not part of J2SE. It is an optional package that must installed separately.
After all, why ship another 10Mb of code to every single Java user, if only
1% of the users would use it.So it will always be an extension to java.
You should read the Frequently asked questions section in the JMF documentation.That will answer a lot.
http://java.sun.com/products/java-media/jmf/reference/faqs/index.html
regards,
Owen