gstreamer RTP to RTMP

run.sh

#!/bin/bash

# tested on Ubuntu 16.04
apt-get install -y \
  gstreamer1.0-libav \
  gstreamer1.0-plugins-bad \
  gstreamer1.0-plugins-base \
  gstreamer1.0-plugins-good \
  gstreamer1.0-tools

# start gstreamer... assumes you have mediasoup configured to use Opus/H264
gst-launch-1.0 -em \
  rtpbin name=rtpbin latency=5 \
  udpsrc port=10000 caps="application/x-rtp,media=(string)audio,clock-rate=(int)48000,encoding-name=(string)OPUS" ! rtpbin.recv_rtp_sink_0 \
    rtpbin. ! queue ! rtpopusdepay ! opusdec ! audioconvert ! audioresample ! voaacenc ! mux. \
  udpsrc port=10002 caps="application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)H264" ! rtpbin.recv_rtp_sink_1 \
    rtpbin. ! queue ! rtph264depay ! h264parse ! mux. \
  flvmux name=mux streamable=true ! rtmpsink sync=false location=rtmp://127.0.0.1:1935/stream

server.js

// snippet from the mediasoup server that actually sets up the `RtpStreamer`
room.on('newpeer', (peer) => {
  peer.on('newproducer', (producer) => {
    let rtpParams = {
      remoteIP: '127.0.0.1',
      remotePort: (producer.kind === 'audio') ? 10000 : 10002
    }
    room.createRtpStreamer(producer, rtpParams).then((streamer) => {
      console.log('started mirroring RTP for', producer.kind);
    });
  });
});

Ha! I realized it just as you posted. You are correct, fixed now.

@tmehlinger do you know how to solved: WARNING: erroneous pipeline: no element "voaacenc"?