import type { Item } from "./item.js";
import { TextStyleOptions } from "pixi.js";
import { Vec2 } from "../types.js";
import { Transcription, TranscriptSegment } from "../../features/speech/transcribe/types.js";
export type CaptionOptions = {
    label?: string;
    enabled?: boolean;
    itemId?: Item.Caption["itemId"];
    start?: number;
    duration?: number;
    styles?: TextStyleOptions;
    maxChars?: number;
    maxDuration?: number;
    maxSilence?: number;
};
export declare const captionPresets: {
    default: {
        styles: {
            fontFamily: string;
            fontSize: number;
            fill: string;
            align: "center";
            wordWrap: true;
            wordWrapWidth: number;
        };
        transform: {
            position: Vec2;
        };
    };
};
export type CaptionPreset = (typeof captionPresets)[keyof typeof captionPresets];
export type CaptionSourceItem = Item.Video | Item.Audio;
export type CaptionAction = {
    (item: CaptionSourceItem, transcript: Transcription, options?: CaptionOptions): Item.Stack;
    make: (transcript: Transcription, options?: CaptionOptions) => Item.Caption;
};
export type CaptionActions = CaptionAction & {
    presets: {
        [TName in keyof typeof captionPresets]: CaptionAction;
    };
};
export declare function segmentTranscript(transcript: Transcription, options?: CaptionOptions): TranscriptSegment[];
export declare function captionDuration(transcript: Transcription, options?: CaptionOptions): number;