import { TorrentFile } from 'webtorrent';
export interface SubtitleCue {
    start: number;
    end: number;
    text: string;
}
export interface ExtractedSubtitleTrack {
    id: string;
    number: number;
    name: string;
    language: string;
    type: string;
    header?: string;
    cues: SubtitleCue[];
}
export interface ExtractedAudioTrack {
    id: string;
    number: number;
    name: string;
    language: string;
    languageLabel: string;
    flag?: string;
    codec: string;
    isDefault: boolean;
}
export declare class MkvSubtitleExtractor {
    private tracks;
    private audioTracks;
    private parser;
    private stream;
    constructor();
    /**
     * Begins parsing the MKV file to extract embedded subtitle tracks and audio tracks.
     */
    start(file: TorrentFile): void;
    /**
     * Cleans raw ASS/SSA markup, removes formatting tags like {\i1}, and converts line breaks.
     */
    private cleanSubtitleText;
    /**
     * Returns all discovered subtitle tracks.
     */
    getTracks(): ExtractedSubtitleTrack[];
    /**
     * Returns a specific track by its track number.
     */
    getTrack(trackNumber: number): ExtractedSubtitleTrack | undefined;
    /**
     * Returns structured JSON for the track including all parsed cues.
     */
    getTrackJson(trackNumber: number): {
        track: number;
        name: string;
        type: string;
        cues: SubtitleCue[];
    } | null;
    /**
     * Formats the extracted track into an ASS script string or WebVTT string.
     */
    formatTrackAsText(trackNumber: number): string;
    private formatAssTime;
    private formatVttTime;
    /**
     * Returns all discovered audio tracks from the MKV container.
     */
    getAudioTracks(): ExtractedAudioTrack[];
    /**
     * Cleans up streams and parsers.
     */
    stop(): void;
}