Unable to realize com.sun.media.codec.video.jmpx.Jmpx@ XXXXXX

I guess you are working with JMF.
If you got a problem like this, all you have to do is:

1. Copy all .so files FROM /JMF-2.1.1e/lib/ TO /usr/lib with: sudo cp *.so /usr/lib/
   
2. Compile your code :)