semana-javascript-expert08

Why we included this project

Client-side video processing is a niche most upload pipelines skip, but this project shows how to do it properly. It's the codebase from a week-long JavaScript course that walks through demuxing MP4 files, splitting the work across Web Workers, downscaling fragments, and muxing them into WebM using WebCodecs and MP4Box. The result is a runnable reference for anyone who wants to shrink or transcode video in the browser before it hits the server, saving the bandwidth of shipping large raw files. It's structured as a tutorial with a feature checklist and optional challenges, so it reads as a learning path rather than a drop-in library. If you're evaluating client-side video processing, seeing the whole pipeline working end to end in one place is genuinely useful.