I built this Browser-based video compositor with a GPU-first architecture. No Canvas 2D in the rendering path — video textures go in as texture_external (zero-copy), compositing runs through a ping-pong WGSL shader pipeline, and export captures frames directly from the GPU canvas via WebCodecs.

39 GPU effects, 37 blend modes, nested compositions, keyframe animation with bezier curves, vector masks, 10-band live EQ, video scopes, and AI-driven editing via GPT function calling. 13 production dependencies. The compositor, all shaders, timeline, audio mixer, mask engine, and export pipeline are built from scratch.

I'm a video artist, not a developer. Built this entirely with Claude. Things break, but when it works, it works.

Chrome/safari with WebGPU required. Firefox and webGPU have problems.