code: function parseDuration(durationString) {
    if (durationString === null || typeof durationString === 'undefined') {
      return -1;
    }
    // Some VAST doesn't have an HH:MM:SS duration format but instead jus the number of seconds
    if (util.isNumeric(durationString)) {
      return parseInt(durationString);
    }
  
    const durationComponents = durationString.split(':');
    if (durationComponents.length !== 3) {
      return -1;
    }
  
    const secondsAndMS = durationComponents[2].split('.');
    let seconds = parseInt(secondsAndMS[0]);
    if (secondsAndMS.length === 2) {
      seconds += parseFloat(`0.${secondsAndMS[1]}`);
    }
  
    const minutes = parseInt(durationComponents[1] * 60);
    const hours = parseInt(durationComponents[0] * 60 * 60);
  
    if (
      isNaN(hours) ||
      isNaN(minutes) ||
      isNaN(seconds) ||
      minutes > 60 * 60 ||
      seconds > 60
    ) {
      return -1;
    }
    return hours + minutes + seconds;
  }
docs: Parses a String duration into a Number.
  @param  {String} durationString - The dureation represented as a string.
  @return {Number}