导入数据库表和音视频demo

media-server-demo-node/lib/simulcast.js

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+//Get the Medooze Media Server interface
+const MediaServer = require("medooze-media-server");
+
+//Get Semantic SDP objects
+const SemanticSDP	= require("semantic-sdp");
+const SDPInfo		= SemanticSDP.SDPInfo;
+const MediaInfo		= SemanticSDP.MediaInfo;
+const CandidateInfo	= SemanticSDP.CandidateInfo;
+const DTLSInfo		= SemanticSDP.DTLSInfo;
+const ICEInfo		= SemanticSDP.ICEInfo;
+const StreamInfo	= SemanticSDP.StreamInfo;
+const TrackInfo		= SemanticSDP.TrackInfo;
+const Direction		= SemanticSDP.Direction;
+const CodecInfo		= SemanticSDP.CodecInfo;
+
+
+const Capabilities = {
+	video : {
+		codecs		: ["h264;packetization-mode=1"],
+		rtx		: true,
+		rtcpfbs		: [
+			{ "id": "goog-remb"},
+			{ "id": "transport-cc"},
+			{ "id": "ccm", "params": ["fir"]},
+			{ "id": "nack"},
+			{ "id": "nack", "params": ["pli"]}
+		],
+		extensions	: [ 
+			"urn:3gpp:video-orientation",
+			"http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01",
+			"urn:ietf:params:rtp-hdrext:sdes:mid",
+			"urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id",
+			"urn:ietf:params:rtp-hdrext:sdes:repaired-rtp-stream-id",
+			"http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time"
+		],
+		simulcast	: true
+	}
+};
+
+module.exports = function(request,protocol,endpoint)
+{
+	const connection = request.accept(protocol);
+			
+	connection.on('message', (frame) =>
+	{
+		//Get cmd
+		var msg = JSON.parse(frame.utf8Data);
+
+
+		//Get cmd
+		if (msg.cmd==="OFFER")
+		{
+
+			//Process the sdp
+			var offer = SDPInfo.process(msg.offer);
+
+			//Create an DTLS ICE transport in that enpoint
+			const transport = endpoint.createTransport(offer);
+			
+			//Set RTP remote properties
+			transport.setRemoteProperties(offer);
+			
+			//Enable bandwidth probing
+			transport.setBandwidthProbing(true);
+			transport.setMaxProbingBitrate(300*1000);
+			
+			//Create local SDP info
+			const answer = offer.answer({
+				dtls		: transport.getLocalDTLSInfo(),
+				ice		: transport.getLocalICEInfo(),
+				candidates	: endpoint.getLocalCandidates(),
+				capabilities	: Capabilities
+			});
+
+			//Set RTP local  properties
+			transport.setLocalProperties({
+				video : answer.getMedia("video")
+			});
+
+			//Get timestamp
+			const ts = Date.now();
+			
+			//Dump contents
+			transport.dump("recordings/simulcast-"+ts+".pcap");
+			
+			//Create recoreder
+			//const recorder = MediaServer.createRecorder ("recordings/simulcast"+ts +".mp4");
+
+			//For each stream offered
+			for (let offered of offer.getStreams().values())
+			{
+				
+				//Create the remote stream into the transport
+				const incomingStream = transport.createIncomingStream(offered);
+
+				//Create new local stream
+				const outgoingStream  = transport.createOutgoingStream({
+					audio: false,
+					video: true
+				});
+
+				//Get local stream info
+				const info = outgoingStream.getStreamInfo();
+
+				//Copy incoming data from the remote stream to the local one
+				connection.transporder = outgoingStream.attachTo(incomingStream)[0];
+				
+				//Add local stream info it to the answer
+				answer.addStream(info);
+
+				setInterval(()=>{
+					//console.dir(incomingStream.getStats(),{depth:null});
+					//console.log(outgoingStream.getStats());
+				},1000);
+				//Record it
+				//recorder.record(incomingStream);
+			}
+
+			//Send response
+			connection.sendUTF(JSON.stringify({
+					answer : answer.toString().replace("h264","H264")
+				}));
+
+			console.log("OFFER");
+			console.log(msg.offer);
+			console.log("ANSWER");
+			console.log(answer.toString().replace("h264","H264"));
+			//Close on disconnect
+			connection.on("close",() => {
+				//Stop transport an recorded
+				transport.stop();
+				//recorder.stop();
+			});
+		} else {
+			connection.transporder.selectEncoding(msg.rid);
+			//Select layer
+			connection.transporder.selectLayer(parseInt(msg.spatialLayerId),parseInt(msg.temporalLayerId));
+		}
+	});
+
+};