Stream RTP to FFMPEG using SDP

Question

I get RTP stream from WebRTC server (I used mediasoup) using node.js and I get the decrypted RTP packets raw data from the stream. I want to forward this RTP data to ffmpeg

Answer 1

I've solved my problem, my setup :

kms(rtpEndpoint)-->.sdp--->ffmpeg--->nginx-rtmp--->vlc

Problem was in sdp. sdp should be in proper format, as sdp answer. Use identical sdp content in file(ffmpeg sdp input file) as well as in media server(kms in my case). IP should be nginx server ip.(works in my case).

Answer 2

c=IN IP4 192.168.193.182

Is that your local IP from which your own Node UDP/TCP server is listening for the connection from ffmpeg?

m=audio 33301 RTP/AVP 111

Why 33301? I hope that is not the same port as the one used by mediasoup to communicate with the remote browser (if so, obviously you¡ll get the "address already in use" error)...

a=rtpmap:111 /opus/48000

That's wrong format. Remove the first "/".

Remove all the a=rtcp-fb lines. I don't think ffmpeg supports any of them at all.

Same for video.