webrtc_dart #

Pure Dart WebRTC implementation. No native dependencies - works on any Dart platform.

Features #

• W3C WebRTC API - Standard RTCPeerConnection interface
• DataChannels - Reliable/unreliable, ordered/unordered
• Media streaming - Video (VP8, VP9, H.264, AV1) and Audio (Opus)
• Full RTP/RTCP - NACK, PLI, FIR, REMB, TWCC, RTX, Simulcast
• NAT traversal - ICE, STUN, TURN with TCP/UDP support
• Secure - DTLS-SRTP with modern cipher suites

Installation #

dependencies:
  webrtc_dart: ^0.23.0

Quick Start #

DataChannel #

import 'package:webrtc_dart/webrtc_dart.dart';

void main() async {
  final pc = RTCPeerConnection(RtcConfiguration(
    iceServers: [IceServer(urls: ['stun:stun.l.google.com:19302'])],
  ));

  // Create data channel
  final channel = pc.createDataChannel('chat');

  channel.onOpen.listen((_) {
    channel.sendString('Hello!');
  });

  channel.onMessage.listen((message) {
    print('Received: $message');
  });

  // Handle ICE candidates
  pc.onIceCandidate.listen((candidate) {
    // Send to remote peer via signaling
  });

  // Create and send offer
  final offer = await pc.createOffer();
  await pc.setLocalDescription(offer);
}

Receiving Media #

final pc = RTCPeerConnection();

pc.onTrack.listen((transceiver) {
  print('Received ${transceiver.receiver.track.kind} track');

  // Access RTP packets directly
  transceiver.receiver.onRtp = (packet) {
    // Process video/audio packets
  };
});

Using TURN #

final pc = RTCPeerConnection(RtcConfiguration(
  iceServers: [
    IceServer(urls: ['stun:stun.l.google.com:19302']),
    IceServer(
      urls: ['turn:turn.example.com:3478'],
      username: 'user',
      credential: 'pass',
    ),
  ],
));

API Overview #

Browser Compatibility #

Tested with Chrome, Firefox, and Safari via automated Playwright tests.

Examples #

See example/ for comprehensive examples:

• datachannel/ - Data channel patterns
• mediachannel/ - Media streaming (sendonly, recvonly, sendrecv)
• save_to_disk/ - Recording to WebM/MP4
• telephony/ - DTMF tones

Test Coverage #

2587 tests passing with browser interop validation.

dart test                    # Run all tests
dart test test/ice/          # Run specific suite

Contributing #

dart format .     # Format code
dart analyze      # Check for issues
dart test         # Run tests

Acknowledgments #

Port of werift-webrtc by Yuki Shindo.

License #

MIT