title: How to extract audio with youtube-dl on Windows
body: <p>I want to extract audio from a video downloaded with youtube-dl on Windows. I got youtube-dl working, but am unable to extract the audio. This problem is caused due to not having the correct audio codes installed.</p>
  
  <p>When I try to extract audio it tells me the following:</p>
  
  <pre><code>WARNING: unable to obtain file audio codes with ffprobe
  </code></pre>
  
  <p>The youtube-dl manual says:</p>
  
  <pre><code>-x -extract-audio    convert video files to audio-only files (requires ffmpeg or avconv and ffprobe or avprobe)
  </code></pre>
  
  <p>How do I install ffprobe or ffmpeg? Do I install this on Windows, or do I install this as a Python extension?</p>
  
  <p>My OS is Windows 7.</p>