This example demonstrates how to use rtpbin with retransmission (rtx)
elements set in the place of rtpbin's "aux" elements in order to
enable RTP retransmission according to the rules of RFC4588.
Original commit message from CVS:
* tests/examples/rtp/.cvsignore:
* tests/examples/rtp/Makefile.am:
* tests/examples/rtp/client-PCMA.c: (pad_added_cb), (main):
* tests/examples/rtp/server-alsasrc-PCMA.c: (main):
Add two C examples of using gstrtpbin as a sender and a receiver.