The Movie Masher AMI includes the moviemasher.js, angular-moviemasher and moviemasher.rb open source projects, which together provide the front and back ends of this complete audio/video editing system. Advanced JavaScript facilitates a realtime, low resolution preview in the browser, while FFmpeg is utilized under the hood to render a final video from high resolution source material. The result can be formatted as needed for download, upload to third-party sites, podcast or broadcast.