import type { Logger } from "../utils/logger.js";
export declare function isRemoteMediaUrl(input: string): boolean;
export declare function assertSafeMediaUrl(input: string): string;
export declare function ytdlpInstallGuidance(): string;
export declare function checkYtdlpAvailability(): Promise<string>;
export declare function downloadMediaUrl(options: {
    url: string;
    outputDir: string;
    logger?: Logger;
}): Promise<{
    filePath: string;
    url: string;
}>;