import { Channel } from './Channel';
import { AiortcMediaStream } from './AiortcMediaStream';
export type AiortcMediaStreamConstraints = {
    audio?: AiortcMediaTrackConstraints | boolean;
    video?: AiortcMediaTrackConstraints | boolean;
};
export type AiortcMediaTrackConstraints = {
    source: 'device' | 'file' | 'url';
    device?: string;
    file?: string;
    url?: string;
    format?: string;
    options?: object;
    timeout?: number;
    loop?: boolean;
    decode?: boolean;
};
export declare function getUserMedia(channel: Channel, constraints?: AiortcMediaStreamConstraints): Promise<AiortcMediaStream>;
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