WebCodecs API tutorial: Master hardware-accelerated video encoding/decoding in JavaScript. Build video editors, live streams & more without server processing.

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WebCodecs is a browser API that enables hardware-accelerated video encoding and decoding in JavaScript, making it possible to build performant video editors, live streaming apps, and programmatic video generators entirely in the browser. The tutorial covers the fundamentals of VideoFrame and EncodedVideoChunk objects, demonstrates how to decode and encode video frame-by-frame, and walks through building a practical video editing application that crops, reframes, adds captions and logos to a video clip using the Streams API for efficient processing.

How to do video processing in the browser with WebCodecs