export declare const ffmpegUtil: {
    /**
     * mov 转 mp4
     * @param fileMov
     * @param fileMp4
     */
    mov2mp4(fileMov: string, fileMp4: string): void;
    /**
     * 插入首帧(封面)
     */
    addPoster(srcMp4: string, pngFile: string, destMp4?: string): void;
    /**
     * 获取视频最后一帧
     * @param srcMp4
     * @param destPng
     */
    getVideoLastImg(srcMp4: string, destPng: string): string;
    /**
     * 设置视频首帧为视频最后一帧
     * @param srcMp4
     * @param destMp4
     */
    setVideoLastImgAsPoster(srcMp4: string, destMp4?: string): void;
};