Opus encoded audio via Track.send?

[unktomi]

Hi, data channel communication is working fine, but i when I try to send opus encoded audio samples between 2 libdatachannel pc's via Track.send, on the sending side there is no error, but on the receiving side the following is logged:

 [rtc::impl::DtlsTransport::incoming@504] Incoming size=960
2023-01-02 15:57:20.058 VERB  [14029527] [rtc::impl::DtlsSrtpTransport::demuxMessage@212] Demultiplexing DTLS and SRTP/SRTCP with first byte, value=236
2023-01-02 15:57:20.058 VERB  [14029527] [rtc::impl::DtlsSrtpTransport::demuxMessage@225] Unknown packet type, value=236, size=960

This is the log from the sending side:

[rtc::impl::DtlsSrtpTransport::sendMedia@96] Send size=859
2023-01-02 16:02:12.202 VERB  [14032050] [rtc::IsRtcp@49] Demultiplexing RTCP and RTP with payload type, value=127
2023-01-02 16:02:12.202 VERB  [14032050] [rtc::impl::DtlsSrtpTransport::sendMedia@125] Protected SRTP packet, size=869
2023-01-02 16:02:12.202 VERB  [14032050] [rtc::impl::IceTransport::send@255] Send size=869
2023-01-02 16:02:12.202 VERB  [14032050] [rtc::impl::IceTransport::LogCallback@354] juice: Sending datagram, size=869

Any ideas?

[paullouisageneau]

The message means an RTP packet is not recognized (the header first byte is invalid) and therefore it is dropped.

How do you send the encoded audio? Did you set a packetizer or do you forward already-packetized RTP?

[unktomi]

Ok thanks. I was using node-datachannel. It seems to be incomplete in terms of supporting media transport over rtp.