import { SegmentAnimations } from './animation';
import { Timerange } from './time_util';
import { KeyframeList, KeyframeProperty } from './keyframe';
type Optional<T> = T | null;
type Dict<T> = {
    [key: string]: T;
};
type AnyDict = Dict<any>;
type Union<T, U> = T | U;
declare class Base_segment {
    segment_id: string;
    material_id: string;
    target_timerange: Timerange | any;
    common_keyframes: KeyframeList[];
    constructor(material_id?: string, target_timerange?: Timerange);
    get start(): number;
    set start(value: number);
    get duration(): number;
    set duration(value: number);
    get end(): number;
    overlaps(other: Base_segment): boolean;
    export_json(): AnyDict;
}
declare class Speed {
    global_id: string;
    speed: number;
    constructor(speed: number);
    export_json(): AnyDict;
}
declare class Clip_settings {
    alpha: number;
    flip_horizontal: boolean;
    flip_vertical: boolean;
    rotation: number;
    scale_x: number;
    scale_y: number;
    transform_x: number;
    transform_y: number;
    constructor({ alpha, flip_horizontal, flip_vertical, rotation, scale_x, scale_y, transform_x, transform_y }: {
        alpha?: number;
        flip_horizontal?: boolean;
        flip_vertical?: boolean;
        rotation?: number;
        scale_x?: number;
        scale_y?: number;
        transform_x?: number;
        transform_y?: number;
    });
    export_json(): AnyDict;
}
declare class Media_segment extends Base_segment {
    source_timerange: Optional<Timerange>;
    speed: Speed;
    volume: number;
    extra_material_refs: string[];
    constructor(material_id: string, source_timerange: Optional<Timerange>, target_timerange: Timerange, speed: number, volume: number);
    export_json(): AnyDict;
}
declare class Visual_segment extends Media_segment {
    clip_settings: Clip_settings;
    uniform_scale: boolean;
    animations_instance: Optional<SegmentAnimations>;
    constructor(material_id: string, source_timerange: Optional<Timerange>, target_timerange: Timerange, speed: number, volume: number, { clip_settings }?: {
        clip_settings?: Clip_settings;
    });
    add_keyframe(_property: KeyframeProperty, time_offset: Union<number, string>, value: number): Visual_segment;
    export_json(): AnyDict;
}
export { Base_segment, Speed, Clip_settings, Media_segment, Visual_segment };