/// <reference types="node" />
import type { SubtitleData, YtDlpOptions } from "./types.js";
/**
 * Downloads the latest release of yt-dlp from GitHub
 * - chmod +x the file if it's not on Windows
 */
export declare function downloadLatestRelease(outdir?: string): Promise<string>;
export declare function execYtDlp(options: YtDlpOptions): import("child_process").PromiseWithChild<{
    stdout: string;
    stderr: string;
}>;
/**
 * Parses the filenames from the output of yt-dlp
 */
export declare function parseFilenamesFromOutput(stdout: string): string[];
/**
 * Extracts text from subtitle data.
 * @param subtitleData - The subtitle data containing events with text segments.
 * @returns The concatenated text from all subtitles.
 */
export declare function extractTextFromJson3Subtitle(subtitleData: SubtitleData): string;
/**
 * Extracts text from VTT subtitle data.
 * @param subtitleData - The subtitle data in VTT format.
 * @returns The concatenated text from all subtitles.
 */
export declare function extractTextFromVttSubtitle(subtitleData: string): string;
/**
 * Cleans and extracts text from SRT subtitle data.
 * - Omits line numbers and timestamps.
 * - Consolidates multiple spaces into one.
 * - Converts dashes to spaces.
 * - Removes duplicate consecutive lines.
 * @param subtitleData Raw SRT subtitle content.
 * @returns A clean, continuous string of subtitle text.
 */
export declare function extractTextFromSrtSubtitle(subtitleData: string): string;
export declare function isConflictError(error: any): boolean;