import { DownloadProgress } from "../util/state";
export declare const exePath: string;
export declare const ffmpegDir: string;
export declare function getLocalVersion(): Promise<string>;
export declare function getLatestVersion(): Promise<any>;
/**
 * Downloads the latest ffmpeg binaries, if they are not currently on the system.
 */
export declare function downloadFFMPEG(): Promise<string>;
/**
 * Check the latest local YTDL version, if any, and update if the latest published version doesn't match.
 */
export declare function autoUpdate(): Promise<boolean>;
/**
 * Downloads a URL using youtube-dl. Returns the full file name, if the download works.
 */
export declare function download(url: string, filePath: string, progress?: DownloadProgress): Promise<string>;