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.