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Remove White Video Backgrounds in Browser Using Canvas API and WebGL

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Web developers often struggle with videos that have white backgrounds, since standard formats like MP4/H.264 do not natively support alpha transparency. A browser-based approach using the Canvas API or WebGL in JavaScript can solve this without desktop software like Premiere Pro or After Effects. The technique involves drawing video frames to an HTML5 canvas, reading pixel data, and setting the alpha channel to zero for white or near-white pixels. A smooth falloff threshold can be applied to off-white edges to prevent jagged borders, with the process looped frame-by-frame via requestAnimationFrame(). Free online tools that run the same logic locally in the browser are also available for those who prefer a no-code solution.

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