title: "FFMPEG not found" even though ffmpeg-binaries have been added to the package.json
body: <p>I keep my bot online using Heroku, so installing FFMPEG to my computer wouldn't really help me any.</p>
  
  <p>The issue is that I'm still getting this error despite having the npm <code>ffmpeg-binaries</code> added to my package.json's dependencies. I've also tried using git URLs from Github and the official FFMPEG website, as well as trying to install the git directly using the run-command option in Heroku's application page, but I keep getting this same error. Am I missing something?</p>