private void loadVPlayerPrefs() {
   if (!isInitialized()) return;
   vPlayer.setBuffer(VP.DEFAULT_BUF_SIZE);
   vPlayer.setVideoQuality(VP.DEFAULT_VIDEO_QUALITY);
   vPlayer.setDeinterlace(VP.DEFAULT_DEINTERLACE);
   vPlayer.setVolume(VP.DEFAULT_STEREO_VOLUME, VP.DEFAULT_STEREO_VOLUME);
   vPlayer.setSubEncoding(VP.DEFAULT_SUB_ENCODING);
   MarginLayoutParams lp = (MarginLayoutParams) mSubtitleContainer.getLayoutParams();
   lp.bottomMargin = (int) VP.DEFAULT_SUB_POS;
   mSubtitleContainer.setLayoutParams(lp);
   vPlayer.setSubShown(mSubShown);
   setTextViewStyle(mSubtitleText);
   if (!TextUtils.isEmpty(mSubPath)) vPlayer.setSubPath(mSubPath);
   if (mVideoView != null && isInitialized()) setVideoLayout();
 }
 @Override
 public void setVideoQuality(int quality) {
   // TODO Auto-generated method stub
   if (isInitialized()) vPlayer.setVideoQuality(quality);
 }