export declare const stopMediaStreamTrack: (track: MediaStreamTrack) => void;
export declare const stopMediaStreamTracks: (stream: MediaStream) => void;
export declare const stopMediaStreamVideoTracks: (stream: MediaStream) => void;
export declare const cloneVideoTrack: (stream: MediaStream) => MediaStreamTrack;
export declare function setVideoConstraints(track: MediaStreamTrack, constraints: MediaTrackConstraints): Promise<void>;