import { Composite } from '../Filter';
import { Stream } from '../Compiler';
/**
 * @category composable/composites
 */
export declare class ConcatComposite extends Composite {
    videos: Stream[][];
    audios: Stream[][];
    segments: number;
    constructor(videos: Stream[][], audios: Stream[][]);
    compose(): Stream;
    clone(): Composite;
}
/**
 * @category composable/composites
 */
export declare function concat(videos: Stream[][], audios: Stream[][]): ConcatComposite;
/**
 * @category composable/composites
 */
export declare function separator<T>(items: T[], separator: (index: number, item: T) => T): T[];