code: function(timestamp) {
          if (!timestamp) {
              return;
          }
          //TODO check this
          //var secondsPerStamp = 1.001,
          var timesplit = timestamp.replace(',', ':').split(':');
          return (parseInt(timesplit[0], 10) * 3600 +
              parseInt(timesplit[1], 10) * 60 +
              parseInt(timesplit[2], 10) +
              parseInt(timesplit[3], 10) / 1000) * 1000 * 1000;
  
      }
docs: translates timestamp to microseconds
  @function
  @param {string} timestamp - string timestamp from srt file
  @public