title: Video taken from front camera always rotates 270 angle after merging video
body: <p>I'm merging two videos using <code>mp4parser</code> library <code>isoviewer-1.0-RC-27.jar</code>. One video is taken from back camera and other is taken from front camera. </p>
  
  <p>It always rotates the video by 270 degree which is taken from front. I don't want any rotation in that. I have tried to give rotation by HeaderTrackBox, but rotation is implemented for entire video. Any how I'm not able to give individual rotation to each video while merging them.</p>