title: RuntimeError: No MovieWriters available in Matplotlib animation
body: <p>The problem I am getting is in code similar to this example: 
  <a href="https://matplotlib.org/examples/animation/basic_example_writer.html" rel="noreferrer">https://matplotlib.org/examples/animation/basic_example_writer.html</a></p>
  
  <p>The error:</p>
  
  <p><strong><em>RuntimeError: No MovieWriters available</em></strong> occurs at <code>Writer = animation.writers['ffmpeg']</code> in the example above.</p>
  
  <p>I am using mac, I have installed ffmpeg using brew, and even installed it with conda even though I am not using anaconda for this particular code.</p>
  
  <p>I am positive that it is installed - I have used it in terminal to change files but it is not working within the program.</p>
  
  <p>Thanks!</p>