export declare const DEFAULT_VIDEO_CONSTRAINTS: MediaStreamConstraints['video'];
export declare const SELECTED_AUDIO_INPUT_KEY = "TwilioVideoApp-selectedAudioInput";
export declare const SELECTED_AUDIO_OUTPUT_KEY = "TwilioVideoApp-selectedAudioOutput";
export declare const SELECTED_VIDEO_INPUT_KEY = "TwilioVideoApp-selectedVideoInput";
export declare const SELECTED_BACKGROUND_SETTINGS_KEY = "TwilioVideoApp-selectedBackgroundSettings";