private function createContainer()
 {
     $mediaInfoContainer = new MediaInfoContainer();
     $general = new General();
     $general->set('Format', 'MPEG Audio');
     $general->set('Duration', '1mn 20s');
     $audio = new Audio();
     $audio->set('Format', 'MPEG Audio');
     $audio->set('Bit rate', '56.0 Kbps');
     $mediaInfoContainer->add($audio);
     $mediaInfoContainer->add($general);
     return $mediaInfoContainer;
 }
 /**
  * @param $typeName
  * @param array $attributes
  *
  * @throws \Mhor\MediaInfo\Exception\UnknownTrackTypeException
  */
 public function addTrackType($typeName, array $attributes)
 {
     $trackType = $this->typeFactory->create($typeName);
     $this->addAttributes($trackType, $attributes);
     $this->mediaInfoContainer->add($trackType);
 }