WebRTC SDP Config

[Minims]

Hello,

I'm trying to configure go2rtc to read a WebRTC stream from a Somfy Visiophone.
I will use echo plugin as my source is changing on every stream request.

I'm receiving a SDP like this, how can i setup the stream in go2rtc ? Thanks !

v=0
o=- * * IN IP4 0.0.0.0
s=-
t=0 0
a=fingerprint:sha-256 *
a=extmap-allow-mixed
a=group:BUNDLE 0 1
m=video 9 UDP/TLS/RTP/SAVPF 96
c=IN IP4 0.0.0.0
a=setup:actpass
a=mid:0
a=ice-ufrag:*
a=ice-pwd:*
a=rtcp-mux
a=rtcp-rsize
a=rtpmap:96 H264/90000
a=fmtp:96 profile-level-id=42e01f;packetization-mode=1;
a=ssrc:* cname:pion
a=ssrc:* msid:pion video
a=ssrc:* mslabel:pion
a=ssrc:* label:video
a=msid:pion video
a=sendrecv
a=candidate:* 1 udp * IP_INTERNE PORT typ host
a=candidate:* 2 udp * IP_INTERNE PORT typ host
a=candidate:* 1 udp * IP_EXTERNE PORT typ srflx raddr 0.0.0.0 rport PORT
a=candidate:* 2 udp * IP_EXTERNE PORT typ srflx raddr 0.0.0.0 rport PORT
a=candidate:* 1 udp * IP_VPN PORT typ relay raddr 0.0.0.0 rport PORT
a=candidate:* 2 udp * IP_VPN PORT typ relay raddr 0.0.0.0 rport PORT
a=end-of-candidates
m=audio 9 UDP/TLS/RTP/SAVPF 111
c=IN IP4 0.0.0.0
a=setup:actpass
a=mid:1
a=ice-ufrag:*
a=ice-pwd:*
a=rtcp-mux
a=rtcp-rsize
a=rtpmap:111 opus/48000/2
a=ssrc:* cname:pion
a=ssrc:* msid:pion audio
a=ssrc:* mslabel:pion
a=ssrc:* label:audio
a=msid:pion audio
a=sendrecv

[AlexxIT]

There is no way to add a new webrtc source without making edits to the go2rtc source code.
I just haven't figured out how to implement it. The echo source won't help here.
WebRTC connection is an interactive process.