export default class MediaConstraints {
    video: VideoConstraints;
    audio: boolean;
    static userCameraConstraints(): MediaConstraints;
    static envCameraConstraints(): MediaConstraints;
}
declare class VideoConstraints {
    facingMode: string | object;
    width: ResolutionRequest;
    height: ResolutionRequest;
    get aspectRatio(): number;
    switchFacingMode(tryAgain?: boolean): void;
}
interface ResolutionRequest {
    min?: number;
    max?: number;
    ideal?: number;
}
export {};