code: private boolean resolveByNames(MediaArgs mediaArgs) {
      // resolved media formats already set? done.
      if (mediaArgs.getMediaFormats() != null) {
        return true;
      }
      // no media format names present? done.
      if (mediaArgs.getMediaFormatNames() == null) {
        return true;
      }
      String[] mediaFormatNames = mediaArgs.getMediaFormatNames();
      MediaFormat[] mediaFormats = new MediaFormat[mediaFormatNames.length];
      boolean resolutionSuccessful = true;
      for (int i = 0; i < mediaFormatNames.length; i++) {
        mediaFormats[i] = mediaFormatHandler.getMediaFormat(mediaFormatNames[i]);
        if (mediaFormats[i] == null) {
          log.warn("Media format name '" + mediaFormatNames[i] + "' is invalid.");
          resolutionSuccessful = false;
        }
      }
      mediaArgs.mediaFormats(mediaFormats);
      mediaArgs.mediaFormatNames((String[])null);
      return resolutionSuccessful;
    }
docs: Resolve media format names to media formats so all downstream logic has only to handle the resolved media formats.
  If resolving fails an exception is thrown.
  @param mediaArgs Media args
  @return true if resolution was successful.