import { Base_segment } from './segment';
import { Video_segment, Sticker_segment } from './video_segment';
import { AudioSegment } from './audio_segment';
import { Text_segment } from './text_segment';
import { Effect_segment, Filter_segment } from './effect_segment';
type SegmentType = typeof Video_segment | typeof AudioSegment | typeof Effect_segment | typeof Filter_segment | typeof Text_segment | typeof Sticker_segment | null;
declare class Track_meta {
    segment_type: SegmentType;
    render_index: number;
    allow_modify: boolean;
    name: string;
    constructor(segment_type: SegmentType, render_index: number, allow_modify: boolean, name?: string);
}
export declare class track_type {
    static video: Track_meta;
    static audio: Track_meta;
    static effect: Track_meta;
    static filter: Track_meta;
    static sticker: Track_meta;
    static text: Track_meta;
    static adjust: Track_meta;
    static fromName(name: string): any;
}
export declare abstract class Base_track {
    track_type: track_type | null;
    name: string;
    track_id: string;
    render_index: number;
    abstract export_json(): Record<string, any>;
}
export declare class Track<Seg_type extends Base_segment> extends Base_track {
    mute: boolean;
    segments: Seg_type[];
    constructor(track_type: track_type, name: string, render_index: number, mute: boolean, track_id?: string);
    get end_time(): number;
    get accept_segment_type(): new (...args: any[]) => Seg_type;
    add_segment(segment: Seg_type): Track<Seg_type>;
    export_json(): Record<string, any>;
}
export {};