demuxAndFix (data, discontinuity, contiguous, startTime) {
    this.demux(data, discontinuity, contiguous)
    return this.fix(startTime, discontinuity, contiguous)
  }
@param {Uint8Array} data
@param {boolean} [discontinuity=false]
@param {boolean} [contiguous=true]
@param {number} [startTime=0]