Building a video converter with Rails 6 and FFmpeg

Today's project pulls together a number of built-in Rails tools, plus a couple of incredibly useful open source projects to build a web application that can convert user-uploaded video files to MP4.To demonstrate some of the modern parts of the standard Rail stack, we're going to go further than just building a converter. We will enhance the user experience during the upload and conversion process with Active Storage to handle direct file uploads, Action Cable for real-time updates on the video conversion, and Stimulus to dynamically update the DOM without needing a heavy Javascript framework.