import { type LocalRenderStyle } from './render-local.js';
import type { MotifMoment } from './motifs.js';
/** An overlay element placed on the animation timeline. */
export type AnimElement = {
    kind: 'lower-third';
    start: number;
    end: number;
    text: string;
} | {
    kind: 'headline';
    start: number;
    end: number;
    word: string;
} | {
    kind: 'stat';
    start: number;
    end: number;
    value: number;
    unit?: string;
    gauge?: number;
} | {
    kind: 'icon';
    start: number;
    end: number;
    motif: MotifMoment;
};
/**
 * Build the composite overlay SVG for one timestamp `t` — every active element with
 * its animation applied. Pure & deterministic.
 */
export declare function animatedFrameSvg(t: number, dims: {
    width: number;
    height: number;
}, style: LocalRenderStyle, elements: AnimElement[]): string;
/** Pure: ffmpeg argv overlaying the rendered frame sequence onto the source at `fps`. */
export declare function buildAnimateRenderArgs(sourceVideo: string, framePattern: string, fps: number, outputPath: string): string[];
export type FfmpegRunner = (args: string[]) => Promise<void>;
export interface AnimateRenderDeps {
    ffmpeg: FfmpegRunner;
    /** Override the rasteriser (tests). Defaults to the live sharp path. */
    rasterise?: (svg: string) => Promise<Buffer>;
}
export interface AnimateRenderOptions {
    sourceVideo: string;
    dims: {
        width: number;
        height: number;
    };
    durationSeconds: number;
    style: LocalRenderStyle;
    elements: AnimElement[];
    fps?: number;
    /** Dir for the intermediate frame PNGs. */
    frameDir: string;
    outputPath: string;
}
/**
 * Render the animated overlay reel: rasterise one transparent frame per output frame
 * (each the composite for that timestamp), then overlay the sequence on the source.
 * Returns the frame paths written.
 */
export declare function renderAnimatedOverlay(opts: AnimateRenderOptions, deps: AnimateRenderDeps): Promise<string[]>;
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