import { MediaInfo } from "../ffmpeg/types/FFmpeg.types";
import { IFilmstripData } from "../library/MediaData";
export declare enum FilmstripExtractorEventTypeEnum {
    OUTPUT = "output",
    ERROR = "error"
}
type EventPayloadMap = {
    [FilmstripExtractorEventTypeEnum.OUTPUT]: IFilmstripData | null;
    [FilmstripExtractorEventTypeEnum.ERROR]: string | null;
};
type EventMap = {
    [K in FilmstripExtractorEventTypeEnum]: (payload: EventPayloadMap[K]) => void;
};
export declare class FilmstripExtractor {
    private worker;
    private listeners;
    private done;
    private destroyed;
    private _startTime;
    constructor();
    private createWorker;
    private destroyWorker;
    init(blobUrl: string | undefined, metadata: MediaInfo, source?: Blob | File): Promise<void>;
    process(): void;
    isDone(): boolean;
    addEventListener<K extends FilmstripExtractorEventTypeEnum>(type: K, callback: EventMap[K]): void;
    removeEventListener<K extends FilmstripExtractorEventTypeEnum>(type: K, callback: (payload: EventPayloadMap[K]) => void): void;
    private emit;
    destroy(): void;
}
export {};