Sip packet capture, how to view the transmitted voice information

SIP is just a signal. You can open the INVITE message and 200OK message in SIP, and look at the SDP information of media negotiation inside, so you can know the IP addresses and port numbers of both media communication parties. Just grab the bag directly according to the information of both parties. Or you can capture all the traffic in wireshark and filter RTP.

I hope LZ will adopt it. Please ask questions if you don't understand anything else.