title: RTP sequence extract
body: <p>A RTP packet consists of a 12-byte RTP header and
  subsequent RTP payload
  The 3rd and 4th byte of the header contain the
  Most-Significant-Byte and Least-Significant-Byte of
  the sequence number of the RTP packet
  Seq Num= (MSB&lt;&lt;8)+LSB</p>
  
  <p>char pszPacket[12];</p>
  
  <p>...</p>
  
  <p>long lSeq = ???? - How to get the sequence number from a packet?</p>