/**
  * Retrieves the extractor to use with the specified mediaUri
  *
  * @param mediaUri The uri to get the extractor for
  * @param defaultType The media type to use if we can't determine the type
  * @return The Extractor for the specified mediaUri
  */
 protected Extractor getExtractor(String mediaUri, MediaUtil.MediaType defaultType) {
   return getExtractor(MediaUtil.getMediaType(mediaUri), defaultType);
 }