Forwarding-Server Not Receiving Mixed RTP Streams

[xiaofang han (hance)]

The forwarding-server is expected to receive the caller's RTP stream, the callee's RTP stream, and the mixed RTP stream simultaneously.

Relevant configuration files are as follows:

cat kamailio.cfg:

...

route[NATMANAGE] {
...
if (is_request()) {
if (!has_totag()) {
rtpengine_manage("replace-origin replace-session-connection");
start_forwarding();
 }
 }
}

...              

cat /etc/rtpengine/rtpengine-recording.conf

...
table = 0

# forward-to =

tcp-send-to = 127.0.0.1:9000
tcp-mixed = true

...

Currently, the forwarding-server can only receive the caller's and callee's RTP streams, but not the mixed RTP stream. Could you please advise on which configurations need to be modified to achieve the expected result?

Thanks!

[Richard Fuchs]

On 28/02/2026 05.33, xiaofang han (hance) wrote:

The forwarding-server is expected to receive the caller's RTP stream, the callee's RTP stream, and the mixed RTP stream simultaneously.

The streams delivered over TCP/TLS can be either individual RTP streams or a single mixed stream per call, not both.

tcp-send-to = 127.0.0.1:9000
tcp-mixed = true

...

Currently, the forwarding-server can only receive the caller's and callee's RTP streams, but not the mixed RTP stream. Could you please advise on which configurations need to be modified to achieve the expected result?

If you see the individual streams delivered, then either the option isn't active or your version doesn't support it.

But as mentioned, if you expect to receive both types at the same time, then currently you're out of luck.

Cheers