/**
 * Convert a timestamp to seconds
 */
declare function convertTimestamptoSeconds(timestamp: string): number | null;
declare function formatToString(value: number): string;
declare function formatDuration(totalSeconds: number | null, separator?: string, isLast?: boolean): string;
declare const _default: {
    TIMESTAMP_REGEX: RegExp;
    convertTimestamptoSeconds: typeof convertTimestamptoSeconds;
    formatDuration: typeof formatDuration;
    formatToString: typeof formatToString;
};
export default _default;