Sometimes its handy to see what processes are running and using resources. Encoding processes use the most resources.
Use this command to check the running encoding processes:

  ps -A |grep encoding

This will give an output similar to the following:

  35949 ?        01:14:59 encodingProcess
  35964 ?        01:08:02 encodingProcess  
  
  (The PID numbers will differ)

If you stop the envivio-muse service and run ps -A |grep encoding. if you still see running services, kill them as they are stuck.