Force VP8/Opus in sfu-ws

Chrome is generate answers that then fail with SetLocalDescription.
Haven't been able to find the issue yet

Author: Sean-Der

sfu-ws/main.go

@@ -229,8 +229,26 @@ func websocketHandler(w http.ResponseWriter, r *http.Request) {
 	// When this frame returns close the Websocket
 	defer c.Close() //nolint
 
+	// Create a MediaEngine object to configure the supported codec
+	m := &webrtc.MediaEngine{}
+
+	// Setup the codecs you want to use.
+	// We'll use a VP8 and Opus but you can also define your own
+	if err := m.RegisterCodec(webrtc.RTPCodecParameters{
+		RTPCodecCapability: webrtc.RTPCodecCapability{MimeType: webrtc.MimeTypeVP8, ClockRate: 90000, Channels: 0, SDPFmtpLine: "", RTCPFeedback: nil},
+		PayloadType:        96,
+	}, webrtc.RTPCodecTypeVideo); err != nil {
+		panic(err)
+	}
+	if err := m.RegisterCodec(webrtc.RTPCodecParameters{
+		RTPCodecCapability: webrtc.RTPCodecCapability{MimeType: webrtc.MimeTypeOpus, ClockRate: 48000, Channels: 2, SDPFmtpLine: "minptime=10; useinbandfec=1", RTCPFeedback: nil},
+		PayloadType:        111,
+	}, webrtc.RTPCodecTypeAudio); err != nil {
+		panic(err)
+	}
+
 	// Create new PeerConnection
-	peerConnection, err := webrtc.NewPeerConnection(webrtc.Configuration{})
+	peerConnection, err := webrtc.NewAPI(webrtc.WithMediaEngine(m)).NewPeerConnection(webrtc.Configuration{})
 	if err != nil {
 		log.Print(err)
 		return