The hardware Acceleration: 'prefer-hardware' flag tells the browser to delegate to the GPU encoder first. On Chrome 94+ and Edge, this is widely supported across Windows, macOS, and Android.
WebGL — Chroma Key Without a Server
Green screen removal is computationally expensive if done naively. AetherCut handles it via a WebGL fragment shader that runs on the GPU — no frame-by-frame CPU pass, no upload to an AI service.
The shader samples each pixel's hue and saturation, compares it against the chroma key target color, and writes a transparency mask in real time. This runs at frame rate during preview.
// Fragment shader excerpt — chroma key
precision mediump float;
uniform sampler2D uTexture;
uniform vec3 uKeyColor;
uniform float uThreshold;
varying vec2 vTexCoord;
void main() {
vec4 color = texture2D(uTexture, vTexCoord);
float diff = distance(color.rgb, uKeyColor);
float alpha = diff < uThreshold ? 0.0 : 1.0;
gl_FragColor = vec4(color.rgb, alpha);
}
Because this executes entirely on your local GPU, webcam footage processed through Green Screen never generates an outbound network request.
Whisper — Offline Transcription in 14 Languages
Transcription is where most "AI" editors quietly phone home. They send your audio to a cloud ASR service and return a transcript. You never see the request because it's abstracted away.
AetherCut runs the Whisper model locally via WebAssembly. The model weights download once and are cached. After that, transcription runs entirely on your device — word-level accuracy, 14 languages supported, no audio ever transmitted.