SSRC: 32 bits

   SSRC: 32 bits
      The SSRC field identifies the synchronization source.  This
      identifier SHOULD be chosen randomly, with the intent that no two
      synchronization sources within the same RTP session will have the
      same SSRC identifier.  An example algorithm for generating a
      random identifier is presented in Appendix A.6.  Although the
      probability of multiple sources choosing the same identifier is
      low, all RTP implementations must be prepared to detect and
      resolve collisions.  Section 8 describes the probability of
      collision along with a mechanism for resolving collisions and
      detecting RTP-level forwarding loops based on the uniqueness of
      the SSRC identifier.  If a source changes its source transport