A good memory as bad written, resolve project issues, debugging code to track the location address Via PJSIP set, recorded for later use.
Via PJSIP library set address value stateless_send_transport_cb method, the method in sip_util.c file in the specific location
As shown below:
FIG 1 is provided via an address location
For exchange can join the QQ group ffmpeg \ streaming \ GB28181 766718184