Hi,
I worked a lot on projects dealing with audio/video processing, merging converting etc using FFMPEG running on NodeJS/Linux based environments, as i developed Service Worker/Progressve Web Application (PWA) and Canvas based applications. I think i have the skills you need for your project !
As a Senior FullStack JavaScript Developer with more than +10 years of experience in software development, I can boost your project (Ubuntu, Javascript, NodeJS, FFMPEG, SocketIO, Express JS Server, Video/Audio Processing, CSS, HTML5, JQuery / Prototype, Canvas, Web Design, ReactJS Platform, PWA and More ++++++).
Please do not hesitate to come chat on private so we can talk. I can send you my CV on demand. Welcome