title: ffmpeg image and flask app in two different containers in Docker compose. How do I use ffmpeg in flask app?
body: <p>Here is my docker compose yml file:</p>
  
  <pre><code>ffmpeg:
      image: jrottenberg/ffmpeg:ubuntu
      tty: true
  flask_app:
    build: ./flask_app
    #image: conorquinn01/composeapp
    command: python ./flask_app/app.py
    ports:
     - "5000:5000"
    volumes:
     - .:/muse_compose2
    links:
      ['ffmpeg']
  </code></pre>
  
  <p>Not sure how to do this. Thanks.</p>