import type { Segment } from './segment';
export declare class FrameSampler {
    private segment;
    private sourceFps;
    private targetFps;
    private sum;
    private framesRequested;
    private lastFrame?;
    constructor(segment: Segment, sourceFps: number, targetFps: number, sum?: number);
    getNextFrame(): Promise<VideoFrame | undefined>;
    getLastFrame(): VideoFrame | undefined;
    getSum(): number;
    getSegment(): Segment;
    getTime(framesToSubtract: number): number;
}
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