WebRTC WHIP UDP-DTLS not works

[johnny-ark]

Question

According to the documentation:

GStreamer can also publish a stream by using the WebRTC / WHIP protocol. Make sure that GStreamer version is at least 1.22, and that if the codec is H264, the profile is baseline. Use the whipclientsink element:

gst-launch-1.0 videotestsrc
! video/x-raw,width=1920,height=1080,format=I420
! x264enc speed-preset=ultrafast bitrate=2000
! video/x-h264,profile=baseline
! whipclientsink signaller::whip-endpoint=http://localhost:8889/mystream/whip

And that is work as expected. But when ispecting all traffic via wireshark - I can see that no DTLS hanshake was performed to stream data via UDP-DTLS. Is it not supported in mediamtx yet?

I even tried to use UDP-DTLS stunner and provided that settings to mediamtx webrtcICEServers2, but get no luck as well

P.S. Reading from mediamtx via WHEP - use DTLS for sure btw, so I'm looking a way how to pass WHIP stream to mediamtx with UDP-DTLS encryption (not TCP/TLS)