import { Timerange } from "./time_util";
import { Base_segment } from "./segment";
import { Video_effect, Filter } from "./video_segment";
import { Video_scene_effect_type, Video_character_effect_type, Filter_type } from "../data";
declare class Effect_segment extends Base_segment {
    effect_inst: Video_effect;
    constructor(effect_type: Video_scene_effect_type | Video_character_effect_type, target_timerange: Timerange, params?: (number | null)[] | null);
}
declare class Filter_segment extends Base_segment {
    material: Filter;
    constructor(meta: Filter_type, target_timerange: Timerange, intensity: number);
}
export { Effect_segment, Filter_segment };