export declare class CameraStream {
    videoElem: HTMLVideoElement;
    stream: MediaStream | null;
    private canvasElem;
    private gtx;
    get renderingContext(): CanvasRenderingContext2D;
    getImageData(): ImageData;
    isVideoReady(): boolean;
    stop(): CameraStream;
    constructor(videoElem: HTMLVideoElement, stream: MediaStream | null);
}