function updateTimeStamp() {
        self.timestamps.push(new Date().getTime());

        if (typeof config.onTimeStamp === 'function') {
            config.onTimeStamp(self.timestamps[self.timestamps.length - 1], self.timestamps);
        }
    }
@property {Array} timestamps - Array of time stamps
@memberof MediaStreamRecorder
@example
console.log(recorder.timestamps);