title: How can I a create thumbnail for any files like (image, video, PDF, .xlsx, .ai, etc) using carrierwave in Rails 5
body: <p>I've tried with </p>
  
  <pre><code>system("convert -strip -thumbnail '100x&gt;' #{org_file.file}[0] #{thumb}.png")
  </code></pre>
  
  <p>but this is not working on Heroku.. </p>
  
  <p>Is there any way to create a thumbnail?</p>
  
  <p>Thanks</p>