ffmpeg usage - quad core still overloaded
===

I have a 3.2GHz Quad Core Xeon E3-1230 CPU, Passmark CPU mark Score of 8,200, 32GB ram - and I can't do more than 4 ffmpeg commands/sessions without being overloaded. When I execute a ffmpeg session, it's telling me that it's not using muliple cores, only one. Why is that? How can I get ffmpeg to fully use all the cpu cores I have?

Thank you in advance for any kind of suggestions.