title: Saving animations in pyzo on a mac
body: <p>I've been trying to save python matplotlib animations as a gif/video.
  I didn't find any convincing solution online.</p>
  
  <p>I tried installing ffmpeg (through homebrew) but I still cannot save using <code>anim.save("filename")</code>. The error given is :</p>
  
  <pre><code>MovieWritter ffmpeg unavailable.
  </code></pre>
  
  <p>Thank you for your help.</p>