title: How to use ffmpeg on Java maven project?
body: <p>I want to use pan control. But I'm confused how to use it.
  For example, I can run this command in terminal
  <code>ffmpeg -i wmafile.wav -af “pan=stereo|c1=c1” outr.wav</code></p>
  
  <p>How to implement this command in java?</p>