title: MediaPlayer cannot seek to unbuffered position
body: <p>This only happens to some specific video files in all version of Android (for example <a href="http://stream1.s3.tv.zdn.vn/streaming/05b00e9f2e4d751d1a80f90dafec681c/50c03d36/2012/1203/bb/bbf9748f01bdfd83d873882afd3921c8.mp4" rel="nofollow">this file</a>)   but when playing in iOS or WP or even in Andorid using Vitamio plugin, it is seekable. I think a streaming video file must meet some conditions to be seekable. Is that right? If so, please tell me what conditions to make a streaming video seekable. Thanks you.</p>
  
  <p>This is error log when I tried to seek to unbuffered position of above file.</p>
  
  <pre><code>12-06 12:01:50.705: E/MediaPlayer(909): Error (1,-1007)
  </code></pre>