导入数据库表和音视频demo

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

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+//Get the Medooze Media Server interface
+const MediaServer = require("medooze-media-server");
+const FileSystem  = require("fs");
+const Path	  = require("path");
+//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 = {
+	audio : {
+		codecs		: ["opus"],
+		extensions	: [ "urn:ietf:params:rtp-hdrext:ssrc-audio-level", "http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01"]
+	},
+	video : {
+		codecs		: ["vp9","vp8","h264;packetization-mode=1"],
+		rtx		: true,
+		rtcpfbs		: [
+			{ "id": "transport-cc"},
+			{ "id": "ccm", "params": ["fir"]},
+			{ "id": "nack"},
+			{ "id": "nack", "params": ["pli"]}
+		],
+		extensions	: [ "http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01"]
+	}
+};
+
+module.exports = function(request,protocol,endpoint)
+{
+	const connection = request.accept(protocol);
+	let player;
+			
+	connection.on('message', (frame) =>
+	{
+		//Get cmd
+		var msg = JSON.parse(frame.utf8Data);
+
+		//Get cmd
+		if (msg.cmd==="OFFER")
+		{
+			let mp4;
+			
+			//Get all files in recording dir
+			const files = FileSystem.readdirSync('recordings');
+			for(let i in files)
+			{
+				if (Path.extname(files[i])===".mp4")
+				{
+					//got ir
+					mp4 = files[i];
+					break;
+				}
+			}
+				
+			//Check
+			if (!mp4)
+			{
+				console.error("no mp4 found");
+				return connection.close();
+			}
+			
+			//Create player
+			player = MediaServer.createPlayer(Path.join("recordings",mp4));
+			
+			//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);
+
+			transport.dump("recordings/play-"+ Date.now()+".pcap",{
+				outgoing : true,
+				rtcp	 : true
+			});
+
+			//Set RTP remote properties
+			transport.setRemoteProperties(offer);
+
+			//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(answer);
+
+			//Create new local stream with only video
+			const outgoingStream  = transport.createOutgoingStream({
+				audio: true,
+				video: true
+			});
+
+			//Copy incoming data from the broadcast stream to the local one
+			outgoingStream.attachTo(player);
+
+			//Get local stream info
+			const info = outgoingStream.getStreamInfo();
+
+			//Add local stream info it to the answer
+			answer.addStream(info);
+
+			//Send response
+			connection.sendUTF(JSON.stringify({
+				answer : answer.toString()
+			}));
+
+		
+			//Close on disconnect
+			connection.on("close",() => {
+				//Stop
+				transport.stop();
+				//Stop playback too
+				player.stop();
+			});
+		} else if (msg.cmd==="PLAY") {
+			player.play({
+				repeat : true
+			});
+		}
+	});
+};