title: Extract audio to stdout [youtube-dl]
body: <p>I am trying to extract the audio from a video and output it to stdout.
  The closest I can get is to download the video to stdout. </p>
  
  <p><code>youtube-dl -o - &lt;link to video&gt;</code></p>
  
  <p>Does anyone know how to do this?</p>
  
  <p>Regards,
  Austin</p>