test

Reviewed-on: #23
Reviewed-by: Cristi Ene <cristi.ene@safemobile.com>

.env

@@ -1,3 +1,7 @@
 PORT=3000
 IP=0.0.0.0 #	Listening IPv4 or IPv6.
 ANNOUNCED_IP=185.8.154.190 # Announced IPv4 or IPv6 (useful when running mediasoup behind NAT with private IP).
+RTC_MIN_PORT=2000
+RTC_MAX_PORT=2020
+SERVER_CERT="./server/ssl/cert.pem"
+SERVER_KEY="./server/ssl/key.pem"

.gitignore

@@ -1 +1,2 @@
 /node_modules
+/dist

README.md

@@ -1,5 +1,11 @@
 # Video server
 
+### Generating certificates
+
+##### To generate SSL certificates you must:
+1. Go to `/server/ssl`
+2. Execute `openssl req -newkey rsa:2048 -new -nodes -x509 -days 3650 -keyout key.pem -out cert.pem`
+
 
 ### Development
 
@@ -16,14 +22,20 @@
 2. Run the `npm start:prod` command to start the server in production mode.
 (To connect to the terminal, use `pm2 log video-server`)
 
----
+
+### Web client
 
 - The server will start by default on port 3000, and the ssl certificates will have to be configured
 - The web client can be accessed using the /sfu path
-ex: http://localhost:3000/sfu/?assetId=1&&accountId=1&producer=true&assetName=Adi&assetType=linx
+ex: https://HOST/sfu/?assetId=1&&accountId=1&producer=true&dest_asset_id=75&assetName=Adi
 assetId = asset id of the unit on which you are doing the test
 accountId = account id of the unit on which you are doing the test
 producer = it will always be true because you are the producer
 (it's possible to put false, but then you have to have another client with producer true)
 assetName = asset name of the unit on which you are doing the test
-assetType = asset type of the unit on which you are doing the test
+dest_asset_id= the addressee with whom the call is made
+- To make a call using this client, you need a microphone and permission to use it
+- For any changes related to the client, the command `npm run watch' will have to be used to generate the bundle.js used by the web client
+
+### Demo project
+  The demo project used initially and then modified for our needs `https://github.com/jamalag/mediasoup2`

app.js

@@ -1,243 +1,601 @@
-import 'dotenv/config'
+require('dotenv').config()
 
+const express = require('express');
+const app = express();
+const Server = require('socket.io');
+const path = require('node:path');
+const fs = require('node:fs');
+let https;
+try {
+  https = require('node:https');
+} catch (err) {
+  console.log('https support is disabled!');
+}
+const mediasoup = require('mediasoup');
+
+let worker;
 /**
- * integrating mediasoup server with a node.js application
+ * 
- */
+ * videoCalls - Dictionary of Object(s)
-
+ * '<callId>': {
-/* Please follow mediasoup installation requirements */
+ *  router: Router,
-/* https://mediasoup.org/documentation/v3/mediasoup/installation/ */
+ *  initiatorAudioProducer: Producer,
-import express from 'express'
+ *  initiatorVideoProducer: Producer,
-const app = express()
+ *  receiverVideoProducer: Producer,
-
+ *  receiverAudioProducer: Producer,
-import https from 'httpolyglot'
+ *  initiatorProducerTransport: Producer Transport,
-import fs from 'fs'
+ *  receiverProducerTransport: Producer Transport,
-import path from 'path'
+ *  initiatorConsumerVideo: Consumer,
-const __dirname = path.resolve()
+ *  initiatorConsumerAudio: Consumer,
-
+ *  initiatorConsumerTransport: Consumer Transport
-import Server from 'socket.io'
+ *  initiatorSocket
-import mediasoup, { getSupportedRtpCapabilities } from 'mediasoup'
+ *  receiverSocket
-
+ * }
-let worker
+ * 
-let router = {}
+ **/
-let producerTransport
+let videoCalls = {};
-let consumerTransport
+let socketDetails = {};
-let producer
-let consumer
 
 app.get('/', (_req, res) => {
   res.send('Hello from mediasoup app!')
-})
+});
 
-app.use('/sfu', express.static(path.join(__dirname, 'public')))
+app.use('/sfu', express.static(path.join(__dirname, 'public')));
 
 // SSL cert for HTTPS access
 const options = {
-  key: fs.readFileSync('./server/ssl/key.pem', 'utf-8'),
+  key: fs.readFileSync(process.env.SERVER_KEY, 'utf-8'),
-  cert: fs.readFileSync('./server/ssl/cert.pem', 'utf-8')
+  cert: fs.readFileSync(process.env.SERVER_CERT, 'utf-8'),
-}
+};
 
-const httpsServer = https.createServer(options, app)
+const httpsServer = https.createServer(options, app);
+
+const io = new Server(httpsServer, {
+  allowEIO3: true,
+  origins: ["*:*"]
+});
 
 httpsServer.listen(process.env.PORT, () => {
-  console.log('Listening on port:', process.env.PORT)
+  console.log('Video server listening on port:', process.env.PORT);
-})
+});
 
-const io = new Server(httpsServer)
+const peers = io.of('/');
-
-// socket.io namespace (could represent a room?)
-const peers = io.of('/mediasoup')
-
-/**
- * Worker
- * |-> Router(s)
- *     |-> Producer Transport(s)
- *         |-> Producer
- *     |-> Consumer Transport(s)
- *         |-> Consumer 
- **/
 
 const createWorker = async () => {
-  worker = await mediasoup.createWorker({
+  try {
-    rtcMinPort: 2000,
+    worker = await mediasoup.createWorker({
-    rtcMaxPort: 2020,
+      rtcMinPort: parseInt(process.env.RTC_MIN_PORT),
-  })
+      rtcMaxPort: parseInt(process.env.RTC_MAX_PORT),
-  console.log(`[createWorker] worker pid ${worker.pid}`)
+    })
-
+    console.log(`[createWorker] worker pid ${worker.pid}`);
-  worker.on('died', error => {
+  
-    // This implies something serious happened, so kill the application
+    worker.on('died', error => {
-    console.error('mediasoup worker has died', error)
+      // This implies something serious happened, so kill the application
-    setTimeout(() => process.exit(1), 2000) // exit in 2 seconds
+      console.error('mediasoup worker has died', error);
-  })
+      setTimeout(() => process.exit(1), 2000); // exit in 2 seconds
-
+    })
-  return worker
+    return worker;
+  } catch (error) {
+    console.log(`ERROR | createWorker | ${error.message}`);
+  }
 }
 
 // We create a Worker as soon as our application starts
-worker = createWorker()
+worker = createWorker();
 
 // This is an Array of RtpCapabilities
 // https://mediasoup.org/documentation/v3/mediasoup/rtp-parameters-and-capabilities/#RtpCodecCapability
 // list of media codecs supported by mediasoup ...
 // https://github.com/versatica/mediasoup/blob/v3/src/supportedRtpCapabilities.ts
-const mediaCodecs = [
+const mediaCodecs = 			[
   {
-    kind: 'audio',
+    kind      : 'audio',
-    mimeType: 'audio/opus',
+    mimeType  : 'audio/opus',
-    clockRate: 48000,
+    clockRate : 48000,
-    channels: 2,
+    channels  : 2
   },
   {
-    kind: 'video',
+    kind       : 'video',
-    mimeType: 'video/VP8',
+    mimeType   : 'video/VP8',
-    clockRate: 90000,
+    clockRate  : 90000,
-    parameters: {
+    parameters :
-      'x-google-start-bitrate': 1000,
+    {
+      'x-google-start-bitrate' : 1000
     },
+    channels  : 2
   },
-]
+  {
-
+    kind       : 'video',
-peers.on('connection', async socket => {
+    mimeType   : 'video/VP9',
-  console.log('[connection] socketId:', socket.id)
+    clockRate  : 90000,
-  socket.emit('connection-success', {
+    parameters :
-    socketId: socket.id,
+    {
-    existsProducer: producer ? true : false,
+      'profile-id'             : 2,
-  })
+      'x-google-start-bitrate' : 1000
-
+    }
-  socket.on('disconnect', () => {
+  },
-    // do some cleanup
+  {
-    console.log('peer disconnected')
+    kind       : 'video',
-  })
+    mimeType   : 'video/h264',
-
+    clockRate  : 90000,
-  socket.on('createRoom', async ({ callId }, callback) => {
+    parameters :
-    console.log('[createRoom] callId', callId);
+    {
-    console.log('Router length:', Object.keys(router).length);
+      'packetization-mode'      : 1,
-    if (router[callId] === undefined) {
+      'profile-level-id'        : '4d0032',
-      // worker.createRouter(options)
+      'level-asymmetry-allowed' : 1,
-      // options = { mediaCodecs, appData }
+      'x-google-start-bitrate'  : 1000
-      // mediaCodecs -> defined above
+    }
-      // appData -> custom application data - we are not supplying any
+  },
-      // none of the two are required
+  {
-      router[callId] = await worker.createRouter({ mediaCodecs })
+    kind       : 'video',
-      console.log(`[createRoom] Router ID: ${router[callId].id}`)
+    mimeType   : 'video/h264',
+    clockRate  : 90000,
+    parameters :
+    {
+      'packetization-mode'      : 1,
+      'profile-level-id'        : '42e01f',
+      'level-asymmetry-allowed' : 1,
+      'x-google-start-bitrate'  : 1000
     }
-    
-    getRtpCapabilities(callId, callback)
-  })
-
-  const getRtpCapabilities = (callId, callback) => {
-    const rtpCapabilities = router[callId].rtpCapabilities
-
-    callback({ rtpCapabilities })
   }
+];
 
-  // Client emits a request to create server side Transport
+const closeCall = (callId) => {
-  // We need to differentiate between the producer and consumer transports
+  try {
-  socket.on('createWebRtcTransport', async ({ sender, callId }, callback) => {
+    if (callId && videoCalls[callId]) {
-    console.log(`[createWebRtcTransport] Is this a sender request? ${sender} | callId ${callId}`)
+      videoCalls[callId].receiverVideoProducer?.close();
-    // The client indicates if it is a producer or a consumer
+      videoCalls[callId].receiverAudioProducer?.close();
-    // if sender is true, indicates a producer else a consumer
+      videoCalls[callId].initiatorConsumerVideo?.close();
-    if (sender)
+      videoCalls[callId].initiatorConsumerAudio?.close();
-      producerTransport = await createWebRtcTransportLayer(callId, callback)
-    else
-      consumerTransport = await createWebRtcTransportLayer(callId, callback)
-  })
 
-  // see client's socket.emit('transport-connect', ...)
+      videoCalls[callId]?.initiatorConsumerTransport?.close();
-  socket.on('transport-connect', async ({ dtlsParameters }) => {
+      videoCalls[callId]?.receiverProducerTransport?.close();
-    console.log('[transport-connect] DTLS PARAMS... ', { dtlsParameters })
+      videoCalls[callId]?.router?.close();
-    await producerTransport.connect({ dtlsParameters })
+      delete videoCalls[callId];
-  })
+    } else {
+      console.log(`The call with id ${callId} has already been deleted`);
+    }
+  } catch (error) {
+    console.log(`ERROR | closeCall | callid ${callId} | ${error.message}`);
+  }
+}
 
-  // see client's socket.emit('transport-produce', ...)
+/*
-  socket.on('transport-produce', async ({ kind, rtpParameters, appData }, callback) => {
+  - Handlers for WS events
-    // call produce based on the prameters from the client
+  - These are created only when we have a connection with a peer
-    producer = await producerTransport.produce({
+*/
-      kind,
+peers.on('connection', async socket => {
-      rtpParameters,
+  console.log('[connection] socketId:', socket.id);
-    })
 
-    console.log(`[transport-produce] Producer ID: ${producer.id} | kind: ${producer.kind}`)
+  // After making the connection successfully, we send the client a 'connection-success' event
+  socket.emit('connection-success', {
+    socketId: socket.id
+  });
 
-    producer.on('transportclose', () => {
+  // It is triggered when the peer is disconnected
-      console.log('transport for this producer closed', callId)
+  socket.on('disconnect', () => {
-      
+    const callId = socketDetails[socket.id];
-      // https://mediasoup.org/documentation/v3/mediasoup/api/#producer-close
+    console.log(`disconnect | socket ${socket.id} | callId ${callId}`);
-      producer.close()
+    delete socketDetails[socket.id];
+    closeCall(callId);
+  });
 
-      // https://mediasoup.org/documentation/v3/mediasoup/api/#router-close
+  /*
-      router[callId].close()
+    - This event creates a room with the roomId and the callId sent
-      delete router[callId]
+    - It will return the rtpCapabilities of that room
-    })
+    - If the room already exists, it will not create it, but will only return rtpCapabilities
-
+  */
-    // Send back to the client the Producer's id
+  socket.on('createRoom', async ({ callId }, callback) => {
-    callback({
+    let callbackResponse = null;
-      id: producer.id
-    })
-  })
-
-  // see client's socket.emit('transport-recv-connect', ...)
-  socket.on('transport-recv-connect', async ({ dtlsParameters }) => {
-    console.log(`[transport-recv-connect] DTLS PARAMS: ${dtlsParameters}`)
-    await consumerTransport.connect({ dtlsParameters })
-  })
-
-  socket.on('consume', async ({ rtpCapabilities, callId }, callback) => {
     try {
-      console.log('consume', rtpCapabilities, callId);
+      // We can continue with the room creation process only if we have a callId
-      // check if the router can consume the specified producer
+      if (callId) {
-      if (router[callId].canConsume({
+        console.log(`[createRoom] socket.id ${socket.id} callId ${callId}`);
-        producerId: producer.id,
+        if (!videoCalls[callId]) {
-        rtpCapabilities
+          videoCalls[callId] = { router: await worker.createRouter({ mediaCodecs }) };
-      })) {
+          console.log(`[createRoom] Router ID: ${videoCalls[callId].router.id}`);
-        // transport can now consume and return a consumer
+          videoCalls[callId].receiverSocket = socket;
-        consumer = await consumerTransport.consume({
+        } else {
-          producerId: producer.id,
+          videoCalls[callId].initiatorSocket = socket;
-          rtpCapabilities,
-          paused: true,
-        })
-
-        consumer.on('transportclose', () => {
-          console.log('transport close from consumer', callId)
-          // closeRoom(callId)
-          delete router[callId]
-        })
-
-        consumer.on('producerclose', () => {
-          console.log('producer of consumer closed', callId)
-          
-          // https://mediasoup.org/documentation/v3/mediasoup/api/#router-close
-          router[callId].close()
-          delete router[callId]
-        })
-
-        // from the consumer extract the following params
-        // to send back to the Client
-        const params = {
-          id: consumer.id,
-          producerId: producer.id,
-          kind: consumer.kind,
-          rtpParameters: consumer.rtpParameters,
         }
-
+        socketDetails[socket.id] = callId;
-        // send the parameters to the client
+        // rtpCapabilities is set for callback
-        callback({ params })
+        console.log('[getRtpCapabilities] callId', callId);
+        callbackResponse = { 
+          rtpCapabilities :videoCalls[callId].router.rtpCapabilities
+        };
+      } else {
+        console.log(`[createRoom] missing callId ${callId}`);
       }
     } catch (error) {
-      console.log(error.message)
+      console.log(`ERROR | createRoom | callId ${callId} | ${error.message}`);
-      callback({
+    } finally {
-        params: {
+      callback(callbackResponse);
-          error: error
+    }
+  });
+
+  /*
+    - Client emits a request to create server side Transport
+    - Depending on the sender, a producer or consumer is created is created on that router
+    - It will return parameters, these are required for the client to create the RecvTransport 
+    from the client.
+      - If the client is producer(sender: true) then it will use parameters for device.createSendTransport(params)
+      - If the client is a consumer(sender: false) then it will use parameters for device.createRecvTransport(params)
+  */
+  socket.on('createWebRtcTransport', async ({ sender }, callback) => {
+    try {
+      const callId = socketDetails[socket.id];
+      console.log(`[createWebRtcTransport] socket ${socket.id} | sender ${sender} | callId ${callId}`);
+      if (sender) {
+        if(!videoCalls[callId].receiverProducerTransport && !isInitiator(callId, socket.id)) {
+          videoCalls[callId].receiverProducerTransport = await createWebRtcTransportLayer(callId, callback);
+        } else if(!videoCalls[callId].initiatorProducerTransport && isInitiator(callId, socket.id)) {
+          videoCalls[callId].initiatorProducerTransport = await createWebRtcTransportLayer(callId, callback);
+        } else {
+          console.log(`producerTransport has already been defined | callId ${callId}`);
+          callback(null);
         }
-      })
+      } else if (!sender) {
+        if(!videoCalls[callId].receiverConsumerTransport && !isInitiator(callId, socket.id)) {
+          videoCalls[callId].receiverConsumerTransport = await createWebRtcTransportLayer(callId, callback);
+        } else if(!videoCalls[callId].initiatorConsumerTransport && isInitiator(callId, socket.id)) {
+          videoCalls[callId].initiatorConsumerTransport = await createWebRtcTransportLayer(callId, callback);
+        }
+      }
+    } catch (error) {
+      console.log(`ERROR | createWebRtcTransport | callId ${socketDetails[socket.id]} | sender ${sender} | ${error.message}`);
+      callback(error);
+    }
+  });
+
+  /*
+    - The client sends this event after successfully creating a createSendTransport(AS PRODUCER)
+    - The connection is made to the created transport
+  */
+  socket.on('transport-connect', async ({ dtlsParameters }) => {
+    try {
+      const callId = socketDetails[socket.id];
+      if (typeof dtlsParameters === 'string') dtlsParameters = JSON.parse(dtlsParameters);
+
+      console.log(`[transport-connect] socket ${socket.id} | callId ${callId}`);
+
+      if (!isInitiator(callId, socket.id)) {
+        await videoCalls[callId].receiverProducerTransport.connect({ dtlsParameters });
+        videoCalls[callId].initiatorSocket.emit('new-producer', {
+          callId
+        });
+      } else {
+        await videoCalls[callId].initiatorProducerTransport.connect({ dtlsParameters });
+        videoCalls[callId].receiverSocket.emit('new-producer', {
+          callId
+        });
+      }
+
+    } catch (error) {
+      console.log(`ERROR | transport-connect | callId ${socketDetails[socket.id]} | ${error.message}`);
+    }
+  });
+
+  /*
+    - The event sent by the client (PRODUCER) after successfully connecting to receiverProducerTransport/initiatorProducerTransport
+    - For the router with the id callId, we make produce on receiverProducerTransport/initiatorProducerTransport
+    - Create the handler on producer at the 'transportclose' event
+    */
+  socket.on('transport-produce', async ({ kind, rtpParameters, appData }, callback) => {
+    try {
+      const callId = socketDetails[socket.id];
+      if (typeof rtpParameters === 'string') rtpParameters = JSON.parse(rtpParameters);
+      
+      console.log(`[transport-produce] kind: ${kind} | socket: ${socket.id} | callId: ${callId}`);
+      
+      if (kind === 'video') {
+        if (!isInitiator(callId, socket.id)) {
+          videoCalls[callId].receiverVideoProducer = await videoCalls[callId].receiverProducerTransport.produce({
+            kind,
+            rtpParameters,
+          });
+
+          console.log(`[transport-produce] receiverVideoProducer Producer ID: ${videoCalls[callId].receiverVideoProducer.id} | kind: ${videoCalls[callId].receiverVideoProducer.kind}`);
+
+          videoCalls[callId].receiverVideoProducer.on('transportclose', () => {
+            const callId = socketDetails[socket.id];
+            console.log('transport for this producer closed', callId)
+            closeCall(callId);
+          });
+
+          // Send back to the client the Producer's id
+          callback && callback({
+            id: videoCalls[callId].receiverVideoProducer.id
+          });
+        } else {
+          videoCalls[callId].initiatorVideoProducer = await videoCalls[callId].initiatorProducerTransport.produce({
+            kind,
+            rtpParameters,
+          });
+
+          console.log(`[transport-produce] initiatorVideoProducer Producer ID: ${videoCalls[callId].initiatorVideoProducer.id} | kind: ${videoCalls[callId].initiatorVideoProducer.kind}`);
+
+          videoCalls[callId].initiatorVideoProducer.on('transportclose', () => {
+            const callId = socketDetails[socket.id];
+            console.log('transport for this producer closed', callId)
+            closeCall(callId);
+          });
+
+          callback && callback({
+            id: videoCalls[callId].initiatorVideoProducer.id
+          });
+        }
+      } else if (kind === 'audio') {
+        if (!isInitiator(callId, socket.id)) {
+          videoCalls[callId].receiverAudioProducer = await videoCalls[callId].receiverProducerTransport.produce({
+            kind,
+            rtpParameters,
+          });
+
+          console.log(`[transport-produce] receiverAudioProducer Producer ID: ${videoCalls[callId].receiverAudioProducer.id} | kind: ${videoCalls[callId].receiverAudioProducer.kind}`);
+      
+          videoCalls[callId].receiverAudioProducer.on('transportclose', () => {
+            const callId = socketDetails[socket.id];
+            console.log('transport for this producer closed', callId)
+            closeCall(callId);
+          });
+
+          // Send back to the client the Producer's id
+          callback && callback({
+            id: videoCalls[callId].receiverAudioProducer.id
+          });
+        } else {
+          videoCalls[callId].initiatorAudioProducer = await videoCalls[callId].initiatorProducerTransport.produce({
+            kind,
+            rtpParameters,
+          });
+
+          console.log(`[transport-produce] initiatorAudioProducer Producer ID: ${videoCalls[callId].initiatorAudioProducer.id} | kind: ${videoCalls[callId].initiatorAudioProducer.kind}`);
+      
+          videoCalls[callId].initiatorAudioProducer.on('transportclose', () => {
+            const callId = socketDetails[socket.id];
+            console.log('transport for this producer closed', callId)
+            closeCall(callId);
+          });
+
+          // Send back to the client the Producer's id
+          callback && callback({
+            id: videoCalls[callId].initiatorAudioProducer.id
+          });
+        }
+      }
+    } catch (error) {
+      console.log(`ERROR | transport-produce | callId ${socketDetails[socket.id]} | ${error.message}`);
+    }
+  });
+
+  /*
+    - The client sends this event after successfully creating a createRecvTransport(AS CONSUMER)
+    - The connection is made to the created consumerTransport
+  */
+  socket.on('transport-recv-connect', async ({ dtlsParameters }) => {
+    try {
+      const callId = socketDetails[socket.id];
+      console.log(`[transport-recv-connect] socket ${socket.id} | callId ${callId}`);
+      if (typeof dtlsParameters === 'string') dtlsParameters = JSON.parse(dtlsParameters);
+      // await videoCalls[callId].consumerTransport.connect({ dtlsParameters });
+      if(!isInitiator(callId, socket.id)) {
+        await videoCalls[callId].receiverConsumerTransport.connect({ dtlsParameters });
+      } else if(isInitiator(callId, socket.id)) {
+        await videoCalls[callId].initiatorConsumerTransport.connect({ dtlsParameters });
+      }
+    } catch (error) {
+      console.log(`ERROR | transport-recv-connect | callId ${socketDetails[socket.id]} | ${error.message}`);
     }
   })
 
-  socket.on('consumer-resume', async () => {
+  /*
-    console.log(`[consumer-resume]`)
+    - The customer consumes after successfully connecting to consumerTransport
-    await consumer.resume()
+    - The previous step was 'transport-recv-connect', and before that 'createWebRtcTransport'
-  })
+    - This event is only sent by the consumer
-})
+    - The parameters that the consumer consumes are returned
+      - The consumer does consumerTransport.consume(params)
+  */
+  socket.on('consume', async ({ rtpCapabilities }, callback) => {
+    try {
+      const callId = socketDetails[socket.id];
+      console.log(`[consume] socket ${socket.id} | callId ${callId} | rtpCapabilities: ${JSON.stringify(rtpCapabilities)}`);
 
+      if (typeof rtpCapabilities === 'string') rtpCapabilities = JSON.parse(rtpCapabilities);
+
+      console.log('[consume] callId', callId);
+      let canConsumeVideo, canConsumeAudio;
+      if (isInitiator(callId, socket.id)) {
+        canConsumeVideo = !!videoCalls[callId].receiverVideoProducer && !!videoCalls[callId].router.canConsume({
+          producerId: videoCalls[callId].receiverVideoProducer.id,
+          rtpCapabilities
+        });
+        canConsumeAudio = !!videoCalls[callId].receiverAudioProducer && !!videoCalls[callId].router.canConsume({
+          producerId: videoCalls[callId].receiverAudioProducer.id,
+          rtpCapabilities
+        });
+
+      } else {
+        canConsumeVideo = !!videoCalls[callId].initiatorVideoProducer && !!videoCalls[callId].router.canConsume({
+          producerId: videoCalls[callId].initiatorVideoProducer.id,
+          rtpCapabilities
+        });
+
+        canConsumeAudio = !!videoCalls[callId].initiatorAudioProducer && !!videoCalls[callId].router.canConsume({
+          producerId: videoCalls[callId].initiatorAudioProducer.id,
+          rtpCapabilities
+        });
+      }
+      console.log('[consume] canConsumeVideo', canConsumeVideo);
+      console.log('[consume] canConsumeAudio', canConsumeAudio);
+
+      if (canConsumeVideo && !canConsumeAudio) {
+        const videoParams = await consumeVideo(callId, socket.id, rtpCapabilities)
+        callback({ videoParams, audioParams: null });
+      } else if (canConsumeVideo && canConsumeAudio) {
+        const videoParams = await consumeVideo(callId, socket.id, rtpCapabilities)
+        const audioParams = await consumeAudio(callId, socket.id, rtpCapabilities)
+        callback({ videoParams, audioParams });
+      } else if (!canConsumeVideo && canConsumeAudio) {
+        const audioParams = await consumeAudio(callId, socket.id, rtpCapabilities)
+        const data = { videoParams: null, audioParams };
+        callback(data);
+      } else {
+        console.log(`[consume] Can't consume | callId ${callId}`);
+        callback(null);
+      }
+    } catch (error) {
+      console.log(`ERROR | consume | callId ${socketDetails[socket.id]} | ${error.message}`)
+      callback({ params: { error } });
+    }
+  });
+
+  /*
+    - Event sent by the consumer after consuming to resume the pause
+    - When consuming on consumerTransport, it is initially done with paused: true, here we will resume
+    - For the initiator we resume the initiatorConsumerAUDIO/VIDEO and for receiver the receiverConsumerAUDIO/VIDEO
+  */
+  socket.on('consumer-resume',() => {
+    try {
+      const callId = socketDetails[socket.id];
+      console.log(`[consumer-resume] callId ${callId}`)
+      if (isInitiator(callId, socket.id)) {
+        videoCalls[callId]?.initiatorConsumerVideo?.resume();
+        videoCalls[callId]?.initiatorConsumerAudio?.resume();
+      } else {
+        videoCalls[callId]?.receiverConsumerVideo?.resume();
+        videoCalls[callId]?.receiverConsumerAudio?.resume();
+      }
+    } catch (error) {
+      console.log(`ERROR | consumer-resume | callId ${socketDetails[socket.id]} | ${error.message}`);
+    }
+  });
+});
+
+const consumeVideo = async (callId, socketId, rtpCapabilities) => {
+
+  if(isInitiator(callId, socketId)) {
+    videoCalls[callId].initiatorConsumerVideo = await videoCalls[callId].initiatorConsumerTransport.consume({
+      producerId: videoCalls[callId].receiverVideoProducer.id,
+      rtpCapabilities,
+      paused: true,
+    });
+
+    // https://mediasoup.org/documentation/v3/mediasoup/api/#consumer-on-transportclose
+    videoCalls[callId].initiatorConsumerVideo.on('transportclose', () => {
+      const callId = socketDetails[socket.id];
+      console.log('transport close from consumer', callId);
+      closeCall(callId);
+    });
+
+    // https://mediasoup.org/documentation/v3/mediasoup/api/#consumer-on-producerclose
+    videoCalls[callId].initiatorConsumerVideo.on('producerclose', () => {
+      const callId = socketDetails[socket.id];
+      console.log('producer of consumer closed', callId);
+      closeCall(callId);
+    });
+
+    return {
+      id: videoCalls[callId].initiatorConsumerVideo.id,
+      producerId: videoCalls[callId].receiverVideoProducer.id,
+      kind: 'video',
+      rtpParameters: videoCalls[callId].initiatorConsumerVideo.rtpParameters,
+    }
+  } else {
+    videoCalls[callId].receiverConsumerVideo = await videoCalls[callId].receiverConsumerTransport.consume({
+      producerId: videoCalls[callId].initiatorVideoProducer.id,
+      rtpCapabilities,
+      paused: true,
+    });
+
+    videoCalls[callId].receiverConsumerVideo.on('transportclose', () => {
+      const callId = socketDetails[socket.id];
+      console.log('transport close from consumer', callId);
+      closeCall(callId);
+    });
+
+    videoCalls[callId].receiverConsumerVideo.on('producerclose', () => {
+      const callId = socketDetails[socket.id];
+      console.log('producer of consumer closed', callId);
+      closeCall(callId);
+    });
+
+    return {
+      id: videoCalls[callId].receiverConsumerVideo.id,
+      producerId: videoCalls[callId].initiatorVideoProducer.id,
+      kind: 'video',
+      rtpParameters: videoCalls[callId].receiverConsumerVideo.rtpParameters,
+    }
+  }
+}
+
+const consumeAudio = async (callId, socketId, rtpCapabilities) => {
+  if(isInitiator(callId, socketId)) {
+    videoCalls[callId].initiatorConsumerAudio = await videoCalls[callId].initiatorConsumerTransport.consume({
+      producerId: videoCalls[callId].receiverAudioProducer.id,
+      rtpCapabilities,
+      paused: true,
+    });
+
+    // https://mediasoup.org/documentation/v3/mediasoup/api/#consumer-on-transportclose
+    videoCalls[callId].initiatorConsumerAudio.on('transportclose', () => {
+      const callId = socketDetails[socket.id];
+      console.log('transport close from consumer', callId);
+      closeCall(callId);
+    });
+
+    // https://mediasoup.org/documentation/v3/mediasoup/api/#consumer-on-producerclose
+    videoCalls[callId].initiatorConsumerAudio.on('producerclose', () => {
+      const callId = socketDetails[socket.id];
+      console.log('producer of consumer closed', callId);
+      closeCall(callId);
+    });
+
+    return {
+      id: videoCalls[callId].initiatorConsumerAudio.id,
+      producerId: videoCalls[callId].receiverAudioProducer.id,
+      kind: 'audio',
+      rtpParameters: videoCalls[callId].initiatorConsumerAudio.rtpParameters,
+    }
+  } else {
+    videoCalls[callId].receiverConsumerAudio = await videoCalls[callId].receiverConsumerTransport.consume({
+      producerId: videoCalls[callId].initiatorAudioProducer.id,
+      rtpCapabilities,
+      paused: true,
+    });
+
+    videoCalls[callId].receiverConsumerAudio.on('transportclose', () => {
+      const callId = socketDetails[socket.id];
+      console.log('transport close from consumer', callId);
+      closeCall(callId);
+    });
+
+    videoCalls[callId].receiverConsumerAudio.on('producerclose', () => {
+      const callId = socketDetails[socket.id];
+      console.log('producer of consumer closed', callId);
+      closeCall(callId);
+    });
+
+    return {
+      id: videoCalls[callId].receiverConsumerAudio.id,
+      producerId: videoCalls[callId].initiatorAudioProducer.id,
+      kind: 'audio',
+      rtpParameters: videoCalls[callId].receiverConsumerAudio.rtpParameters,
+    }
+  }
+}
+
+const isInitiator = (callId, socketId) => {
+  return (videoCalls[callId]?.initiatorSocket?.id === socketId);
+}
+
+/*
+  - Called from at event 'createWebRtcTransport' and assigned to the consumer or producer transport
+  - It will return parameters, these are required for the client to create the RecvTransport 
+    from the client.
+    - If the client is producer(sender: true) then it will use parameters for device.createSendTransport(params)
+    - If the client is a consumer(sender: false) then it will use parameters for device.createRecvTransport(params)
+*/
 const createWebRtcTransportLayer = async (callId, callback) => {
   try {
     console.log('[createWebRtcTransportLayer] callId', callId);
@@ -252,48 +610,40 @@ const createWebRtcTransportLayer = async (callId, callback) => {
       enableUdp: true,
       enableTcp: true,
       preferUdp: true,
-    }
+    };
-
-    // console.log('webRtcTransport_options', webRtcTransport_options);
-    // console.log('router', router, '| router[callId]', router[callId]);
     
     // https://mediasoup.org/documentation/v3/mediasoup/api/#router-createWebRtcTransport
-    let transport = await router[callId].createWebRtcTransport(webRtcTransport_options)
+    let transport = await videoCalls[callId].router.createWebRtcTransport(webRtcTransport_options)
-    console.log(`callId: ${callId} | transport id: ${transport.id}`)
 
+    // Handler for when DTLS(Datagram Transport Layer Security) changes
     transport.on('dtlsstatechange', dtlsState => {
+      console.log(`transport | dtlsstatechange | calldId ${callId} | dtlsState ${dtlsState}`);
       if (dtlsState === 'closed') {
-        transport.close()
+        transport.close();
       }
-    })
+    });
 
+    // Handler if the transport layer has closed (for various reasons)
     transport.on('close', () => {
-      console.log('transport closed')
+      console.log(`transport | closed | calldId ${callId}`);
-    })
+    });
 
     const params = {
       id: transport.id,
       iceParameters: transport.iceParameters,
       iceCandidates: transport.iceCandidates,
       dtlsParameters: transport.dtlsParameters,
-    }
+    };
 
-    console.log('params', params);
+    console.log('[createWebRtcTransportLayer] callback params', params);
+    // Send back to the client the params
+    callback({ params });
 
-    // send back to the client the following prameters
+    // Set transport to producerTransport or consumerTransport
-    callback({
+    return transport;
-      // https://mediasoup.org/documentation/v3/mediasoup-client/api/#TransportOptions
-      params
-    })
-
-    return transport
 
   } catch (error) {
-    console.log('[createWebRtcTransportLayer] ERROR', JSON.stringify(error));
+    console.log(`ERROR | createWebRtcTransportLayer | callId ${socketDetails[socket.id]} | ${error.message}`);
-    callback({
+    callback({ params: { error } });
-      params: {
-        error: error
-      }
-    })
   }
 }

build.sh

@@ -0,0 +1,52 @@
+#/!bin/bash
+## PREBUILD PROCESS
+# check dist dir to be present and empty
+if [ ! -d "dist" ]; then
+  ## MAKE DIR
+  mkdir "dist"
+  echo "Directory dist created."
+else
+  ## CLEANUP
+  rm -fr dist/*
+fi
+
+if [ -d "node_modules" ]; then
+  rm -fr node_modules
+fi
+
+# Install dependencies
+#npm install
+
+## PROJECT NEEDS
+echo "Building app... from $(git rev-parse --abbrev-ref HEAD)"
+#npm run-script build
+#cp -r {.env,app.js,package.json,server,public} dist/
+cp -r ./* dist/
+
+#Add version control for pm2
+cd dist
+#Add version control for pm2
+version=$(git describe)
+file_pkg="package.json"
+key="  \"version\": \""
+
+count=$(echo ${version%%-*} | grep -o "\." | wc -l)
+if (( $count > 1 )); then
+        version=${version%%-*}
+else
+        version="${version%%-*}.0"
+fi
+if [ -f "$file_pkg" ] && [ ! -z "$version" ]; then
+  version="  \"version\": \"$version\","
+  sed -i "s|^.*$key.*|${version//\//\\/}|g" $file_pkg
+  text=$(cat $file_pkg | grep -c "$version")
+  if [ $text -eq 0 ]; then
+          echo "Version couldn't be set"
+  else
+          echo "Version $version successfully applied to App"
+  fi
+fi
+
+## POST BUILD
+
+cd -

package-lock.json

@@ -12,7 +12,6 @@
         "@types/express": "^4.17.13",
         "dotenv": "^16.0.1",
         "express": "^4.18.1",
-        "httpolyglot": "^0.1.2",
         "mediasoup": "^3.10.4",
         "mediasoup-client": "^3.6.54",
         "parcel": "^2.7.0",
@@ -1792,27 +1791,6 @@
         "node": ">=10"
       }
     },
-    "node_modules/@pm2/agent/node_modules/ws": {
-      "version": "7.4.6",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.6.tgz",
-      "integrity": "sha512-YmhHDO4MzaDLB+M9ym/mDA5z0naX8j7SIlT8f8z+I0VtzsRbekxEutHSme7NPS2qE8StCYQNUnfWdXta/Yu85A==",
-      "dev": true,
-      "engines": {
-        "node": ">=8.3.0"
-      },
-      "peerDependencies": {
-        "bufferutil": "^4.0.1",
-        "utf-8-validate": "^5.0.2"
-      },
-      "peerDependenciesMeta": {
-        "bufferutil": {
-          "optional": true
-        },
-        "utf-8-validate": {
-          "optional": true
-        }
-      }
-    },
     "node_modules/@pm2/io": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/@pm2/io/-/io-5.0.0.tgz",
@@ -2388,11 +2366,6 @@
       "integrity": "sha512-iAB+JbDEGXhyIUavoDl9WP/Jj106Kz9DEn1DPgYw5ruDn0e3Wgi3sKFm55sASdGBNOQB8F59d9qQ7deqrHA8wQ==",
       "dev": true
     },
-    "node_modules/async-limiter": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.1.tgz",
-      "integrity": "sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ=="
-    },
     "node_modules/async-listener": {
       "version": "0.6.10",
       "resolved": "https://registry.npmjs.org/async-listener/-/async-listener-0.6.10.tgz",
@@ -2455,9 +2428,9 @@
       }
     },
     "node_modules/base64-arraybuffer": {
-      "version": "0.1.5",
+      "version": "0.1.4",
-      "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-0.1.5.tgz",
+      "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-0.1.4.tgz",
-      "integrity": "sha512-437oANT9tP582zZMwSvZGy2nmSeAb8DW2me3y+Uv1Wp2Rulr8Mqlyrv3E7MLxmsiaPSMMDmiDVzgE+e8zlMx9g==",
+      "integrity": "sha512-a1eIFi4R9ySrbiMuyTGx5e92uRH5tQY6kArNcFaKBUleIoLjdjBg7Zxm3Mqm3Kmkf27HLR/1fnxX9q8GQ7Iavg==",
       "engines": {
         "node": ">= 0.6.0"
       }
@@ -2483,22 +2456,11 @@
       ]
     },
     "node_modules/base64id": {
-      "version": "1.0.0",
+      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/base64id/-/base64id-1.0.0.tgz",
+      "resolved": "https://registry.npmjs.org/base64id/-/base64id-2.0.0.tgz",
-      "integrity": "sha512-rz8L+d/xByiB/vLVftPkyY215fqNrmasrcJsYkVcm4TgJNz+YXKrFaFAWibSaHkiKoSgMDCb+lipOIRQNGYesw==",
+      "integrity": "sha512-lGe34o6EHj9y3Kts9R4ZYs/Gr+6N7MCaMlIFA3F1R2O5/m7K06AxfSeO5530PEERE6/WyEg3lsuyw4GHlPZHog==",
       "engines": {
-        "node": ">= 0.4.0"
+        "node": "^4.5.0 || >= 5.9"
-      }
-    },
-    "node_modules/better-assert": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/better-assert/-/better-assert-1.0.2.tgz",
-      "integrity": "sha512-bYeph2DFlpK1XmGs6fvlLRUN29QISM3GBuUwSFsMY2XRx4AvC0WNCS57j4c/xGrK2RS24C1w3YoBOsw9fT46tQ==",
-      "dependencies": {
-        "callsite": "1.0.0"
-      },
-      "engines": {
-        "node": "*"
       }
     },
     "node_modules/binary-extensions": {
@@ -2875,14 +2837,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/callsite": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/callsite/-/callsite-1.0.0.tgz",
-      "integrity": "sha512-0vdNRFXn5q+dtOqjfFtmtlI9N2eVZ7LMyEV2iKC5mEEFvSg/69Ml6b/WU2qF8W1nLRa0wiSrDT3Y5jOHZCwKPQ==",
-      "engines": {
-        "node": "*"
-      }
-    },
     "node_modules/callsites": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/callsites/-/callsites-3.1.0.tgz",
@@ -3051,9 +3005,9 @@
       "integrity": "sha512-WZveuKPeKAG9qY+FkYDeADzdHyTYdIboXS59ixDeRJL5ZhxpqUnxSOwop4FQjMsiYm3/Or8cegVbpAHNA7pHxw=="
     },
     "node_modules/component-emitter": {
-      "version": "1.2.1",
+      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.2.1.tgz",
+      "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.0.tgz",
-      "integrity": "sha512-jPatnhd33viNplKjqXKRkGU345p263OIWzDL2wH3LGIGp5Kojo+uXizHmOADRvhGFFTnJqX3jBAKP6vvmSDKcA=="
+      "integrity": "sha512-Rd3se6QB+sO1TwqZjscQrurpEPIfO0/yYnSin6Q/rD3mOutHvUrCAhJub3r90uNb+SESBuE0QYoB90YdfatsRg=="
     },
     "node_modules/component-inherit": {
       "version": "0.0.3",
@@ -3629,36 +3583,36 @@
       }
     },
     "node_modules/engine.io": {
-      "version": "3.1.5",
+      "version": "3.6.0",
-      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-3.1.5.tgz",
+      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-3.6.0.tgz",
-      "integrity": "sha512-D06ivJkYxyRrcEe0bTpNnBQNgP9d3xog+qZlLbui8EsMr/DouQpf5o9FzJnWYHEYE0YsFHllUv2R1dkgYZXHcA==",
+      "integrity": "sha512-Kc8fo5bbg8F4a2f3HPHTEpGyq/IRIQpyeHu3H1ThR14XDD7VrLcsGBo16HUpahgp8YkHJDaU5gNxJZbuGcuueg==",
       "dependencies": {
         "accepts": "~1.3.4",
-        "base64id": "1.0.0",
+        "base64id": "2.0.0",
-        "cookie": "0.3.1",
+        "cookie": "~0.4.1",
-        "debug": "~3.1.0",
+        "debug": "~4.1.0",
-        "engine.io-parser": "~2.1.0",
+        "engine.io-parser": "~2.2.0",
-        "ws": "~3.3.1"
+        "ws": "~7.4.2"
       },
-      "optionalDependencies": {
+      "engines": {
-        "uws": "~9.14.0"
+        "node": ">=8.0.0"
       }
     },
     "node_modules/engine.io-client": {
-      "version": "3.1.6",
+      "version": "3.5.3",
-      "resolved": "https://registry.npmjs.org/engine.io-client/-/engine.io-client-3.1.6.tgz",
+      "resolved": "https://registry.npmjs.org/engine.io-client/-/engine.io-client-3.5.3.tgz",
-      "integrity": "sha512-hnuHsFluXnsKOndS4Hv6SvUrgdYx1pk2NqfaDMW+GWdgfU3+/V25Cj7I8a0x92idSpa5PIhJRKxPvp9mnoLsfg==",
+      "integrity": "sha512-qsgyc/CEhJ6cgMUwxRRtOndGVhIu5hpL5tR4umSpmX/MvkFoIxUTM7oFMDQumHNzlNLwSVy6qhstFPoWTf7dOw==",
       "dependencies": {
-        "component-emitter": "1.2.1",
+        "component-emitter": "~1.3.0",
         "component-inherit": "0.0.3",
         "debug": "~3.1.0",
-        "engine.io-parser": "~2.1.1",
+        "engine.io-parser": "~2.2.0",
         "has-cors": "1.1.0",
         "indexof": "0.0.1",
-        "parseqs": "0.0.5",
+        "parseqs": "0.0.6",
-        "parseuri": "0.0.5",
+        "parseuri": "0.0.6",
-        "ws": "~3.3.1",
+        "ws": "~7.4.2",
-        "xmlhttprequest-ssl": "~1.5.4",
+        "xmlhttprequest-ssl": "~1.6.2",
         "yeast": "0.1.2"
       }
     },
@@ -3671,33 +3625,39 @@
       }
     },
     "node_modules/engine.io-parser": {
-      "version": "2.1.3",
+      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/engine.io-parser/-/engine.io-parser-2.1.3.tgz",
+      "resolved": "https://registry.npmjs.org/engine.io-parser/-/engine.io-parser-2.2.1.tgz",
-      "integrity": "sha512-6HXPre2O4Houl7c4g7Ic/XzPnHBvaEmN90vtRO9uLmwtRqQmTOw0QMevL1TOfL2Cpu1VzsaTmMotQgMdkzGkVA==",
+      "integrity": "sha512-x+dN/fBH8Ro8TFwJ+rkB2AmuVw9Yu2mockR/p3W8f8YtExwFgDvBDi0GWyb4ZLkpahtDGZgtr3zLovanJghPqg==",
       "dependencies": {
         "after": "0.8.2",
         "arraybuffer.slice": "~0.0.7",
-        "base64-arraybuffer": "0.1.5",
+        "base64-arraybuffer": "0.1.4",
         "blob": "0.0.5",
         "has-binary2": "~1.0.2"
       }
     },
     "node_modules/engine.io/node_modules/cookie": {
-      "version": "0.3.1",
+      "version": "0.4.2",
-      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.3.1.tgz",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.4.2.tgz",
-      "integrity": "sha512-+IJOX0OqlHCszo2mBUq+SrEbCj6w7Kpffqx60zYbPTFaO4+yYgRjHwcZNpWvaTylDHaV7PPmBHzSecZiMhtPgw==",
+      "integrity": "sha512-aSWTXFzaKWkvHO1Ny/s+ePFpvKsPnjc551iI41v3ny/ow6tBG5Vd+FuqGNhh1LxOmVzOlGUriIlOaokOvhaStA==",
       "engines": {
         "node": ">= 0.6"
       }
     },
     "node_modules/engine.io/node_modules/debug": {
-      "version": "3.1.0",
+      "version": "4.1.1",
-      "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
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@@ -10887,13 +10837,13 @@
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-      "resolved": "https://registry.npmjs.org/engine.io-parser/-/engine.io-parser-2.1.3.tgz",
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@@ -11558,11 +11508,6 @@
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@@ -12447,12 +12392,8 @@
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@@ -12671,20 +12612,14 @@
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-      "version": "0.0.5",
+      "version": "0.0.6",
-      "resolved": "https://registry.npmjs.org/parseuri/-/parseuri-0.0.5.tgz",
+      "resolved": "https://registry.npmjs.org/parseuri/-/parseuri-0.0.6.tgz",
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       "version": "1.3.3",
@@ -13464,16 +13399,31 @@
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-      "version": "2.0.3",
+      "version": "2.5.0",
-      "resolved": "https://registry.npmjs.org/socket.io/-/socket.io-2.0.3.tgz",
+      "resolved": "https://registry.npmjs.org/socket.io/-/socket.io-2.5.0.tgz",
-      "integrity": "sha512-qya7+ILKQ9vbXwJ/bUkT5Oe4RCD8c7Z9bZSg3jDDnuNxl+thkzgYz4BB+Oe8hxh1pF2xRbZUnIbrFw7+lpp94w==",
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       "requires": {
-        "debug": "~2.6.6",
+        "debug": "~4.1.0",
-        "engine.io": "~3.1.0",
+        "engine.io": "~3.6.0",
-        "object-assign": "~4.1.1",
+        "has-binary2": "~1.0.2",
         "socket.io-adapter": "~1.1.0",
-        "socket.io-client": "~2.0.2",
+        "socket.io-client": "2.5.0",
-        "socket.io-parser": "~3.1.1"
+        "socket.io-parser": "~3.4.0"
+      },
+      "dependencies": {
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+          "requires": {
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+          }
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+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
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+        }
       }
     },
     "socket.io-adapter": {
@@ -13482,34 +13432,21 @@
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     },
     "socket.io-client": {
-      "version": "2.0.3",
+      "version": "2.5.0",
-      "resolved": "https://registry.npmjs.org/socket.io-client/-/socket.io-client-2.0.3.tgz",
+      "resolved": "https://registry.npmjs.org/socket.io-client/-/socket.io-client-2.5.0.tgz",
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-        "component-emitter": "1.2.1",
+        "component-emitter": "~1.3.0",
-        "debug": "~2.6.4",
-        "engine.io-client": "~3.1.0",
-        "has-cors": "1.1.0",
-        "indexof": "0.0.1",
-        "object-component": "0.0.3",
-        "parseqs": "0.0.5",
-        "parseuri": "0.0.5",
-        "socket.io-parser": "~3.1.1",
-        "to-array": "0.1.4"
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-    "socket.io-parser": {
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-      "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-3.1.3.tgz",
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-      "requires": {
-        "component-emitter": "1.2.1",
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+        "engine.io-client": "~3.5.0",
         "has-binary2": "~1.0.2",
-        "isarray": "2.0.1"
+        "indexof": "0.0.1",
+        "parseqs": "0.0.6",
+        "parseuri": "0.0.6",
+        "socket.io-parser": "~3.3.0",
+        "to-array": "0.1.4"
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         "debug": {
@@ -13519,6 +13456,46 @@
           "requires": {
             "ms": "2.0.0"
           }
+        },
+        "socket.io-parser": {
+          "version": "3.3.2",
+          "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-3.3.2.tgz",
+          "integrity": "sha512-FJvDBuOALxdCI9qwRrO/Rfp9yfndRtc1jSgVgV8FDraihmSP/MLGD5PEuJrNfjALvcQ+vMDM/33AWOYP/JSjDg==",
+          "requires": {
+            "component-emitter": "~1.3.0",
+            "debug": "~3.1.0",
+            "isarray": "2.0.1"
+          }
+        }
+      }
+    },
+    "socket.io-parser": {
+      "version": "3.4.1",
+      "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-3.4.1.tgz",
+      "integrity": "sha512-11hMgzL+WCLWf1uFtHSNvliI++tcRUWdoeYuwIl+Axvwy9z2gQM+7nJyN3STj1tLj5JyIUH8/gpDGxzAlDdi0A==",
+      "requires": {
+        "component-emitter": "1.2.1",
+        "debug": "~4.1.0",
+        "isarray": "2.0.1"
+      },
+      "dependencies": {
+        "component-emitter": {
+          "version": "1.2.1",
+          "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.2.1.tgz",
+          "integrity": "sha512-jPatnhd33viNplKjqXKRkGU345p263OIWzDL2wH3LGIGp5Kojo+uXizHmOADRvhGFFTnJqX3jBAKP6vvmSDKcA=="
+        },
+        "debug": {
+          "version": "4.1.1",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        },
+        "ms": {
+          "version": "2.1.3",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
+          "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA=="
         }
       }
     },
@@ -14023,11 +14000,6 @@
       "dev": true,
       "peer": true
     },
-    "ultron": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/ultron/-/ultron-1.1.1.tgz",
-      "integrity": "sha512-UIEXBNeYmKptWH6z8ZnqTeS8fV74zG0/eRU9VGkpzz+LIJNs8W/zM/L+7ctCkRrgbNnnR0xxw4bKOr0cW0N0Og=="
-    },
     "umd": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/umd/-/umd-3.0.3.tgz",
@@ -14138,12 +14110,6 @@
       "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.2.tgz",
       "integrity": "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg=="
     },
-    "uws": {
-      "version": "9.14.0",
-      "resolved": "https://registry.npmjs.org/uws/-/uws-9.14.0.tgz",
-      "integrity": "sha512-HNMztPP5A1sKuVFmdZ6BPVpBQd5bUjNC8EFMFiICK+oho/OQsAJy5hnIx4btMHiOk8j04f/DbIlqnEZ9d72dqg==",
-      "optional": true
-    },
     "v8-compile-cache": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/v8-compile-cache/-/v8-compile-cache-2.3.0.tgz",
@@ -14273,26 +14239,15 @@
       "dev": true
     },
     "ws": {
-      "version": "3.3.3",
+      "version": "7.4.6",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-3.3.3.tgz",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.6.tgz",
-      "integrity": "sha512-nnWLa/NwZSt4KQJu51MYlCcSQ5g7INpOrOMt4XV8j4dqTXdmlUmSHQ8/oLC069ckre0fRsgfvsKwbTdtKLCDkA==",
+      "integrity": "sha512-YmhHDO4MzaDLB+M9ym/mDA5z0naX8j7SIlT8f8z+I0VtzsRbekxEutHSme7NPS2qE8StCYQNUnfWdXta/Yu85A==",
-      "requires": {
+      "requires": {}
-        "async-limiter": "~1.0.0",
-        "safe-buffer": "~5.1.0",
-        "ultron": "~1.1.0"
-      },
-      "dependencies": {
-        "safe-buffer": {
-          "version": "5.1.2",
-          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
-          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
-        }
-      }
     },
     "xmlhttprequest-ssl": {
-      "version": "1.5.5",
+      "version": "1.6.3",
-      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.5.tgz",
+      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.6.3.tgz",
-      "integrity": "sha512-/bFPLUgJrfGUL10AIv4Y7/CUt6so9CLtB/oFxQSHseSDNNCdC6vwwKEqwLN6wNPBg9YWXAiMu8jkf6RPRS/75Q=="
+      "integrity": "sha512-3XfeQE/wNkvrIktn2Kf0869fC0BN6UpydVasGIeSm2B1Llihf7/0UfZM+eCkOw3P7bP4+qPgqhm7ZoxuJtFU0Q=="
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     "xregexp": {
       "version": "2.0.0",

package.json

@@ -5,19 +5,17 @@
   "main": "app.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "start:dev": "nodemon app.ts",
+    "start:dev": "nodemon app.js",
     "start:prod": "pm2 start ./app.js -n video-server",
     "watch": "watchify public/index.js -o public/bundle.js -v"
   },
   "keywords": [],
   "author": "",
   "license": "ISC",
-  "type": "module",
   "dependencies": {
     "@types/express": "^4.17.13",
     "dotenv": "^16.0.1",
     "express": "^4.18.1",
-    "httpolyglot": "^0.1.2",
     "mediasoup": "^3.10.4",
     "mediasoup-client": "^3.6.54",
     "parcel": "^2.7.0",

public/config.js

@@ -1,5 +1,4 @@
 module.exports = {
   hubAddress: 'https://hub.dev.linx.safemobile.com/',
-  mediasoupAddress: 'https://video.safemobile.org/mediasoup',
+  mediasoupAddress: 'https://testing.video.safemobile.org',
-  // mediasoupAddress: 'http://localhost:3000/mediasoup',
 }

public/index.html

@@ -34,6 +34,9 @@
   <body>
     <body>
         <div id="video">
+            <legend>Client options:</legend>
+            <input type="checkbox" id="produceAudio" name="produceAudio">
+            <label for="produceAudio">Produce audio</label><br>
             <table>
                 <thead>
                     <th>Local Video</th>
@@ -43,12 +46,24 @@
                     <tr>
                         <td>
                             <div id="sharedBtns">
-                                <video id="localVideo" autoplay class="video" ></video>
+                                <video
+                                    id="localVideo"
+                                    class="video"
+                                    autoplay
+                                    muted
+                                    playsinline
+                                ></video>
                             </div>
                         </td>
                         <td>
                             <div id="sharedBtns">
-                                <video id="remoteVideo" autoplay class="video" ></video>
+                                <video
+                                    id="remoteVideo"
+                                    class="video"
+                                    autoplay
+                                    muted
+                                    playsinline
+                                ></video>
                             </div>
                         </td>
                     </tr>
@@ -61,33 +76,10 @@
                         <td>
                             <div id="sharedBtns">
                                 <button id="btnRecvSendTransport">Consume</button>
+                                <button id="remoteSoundControl">Unmute</button>
                             </div>
                         </td>
                     </tr>
-                    <!-- <tr>
-                        <td colspan="2">
-                            <div id="sharedBtns">
-                                <button id="btnRtpCapabilities">2. Get Rtp Capabilities</button>
-                                <br />
-                                <button id="btnDevice">3. Create Device</button>
-                            </div>
-                        </td>
-                    </tr>
-                    <tr>
-                        <td>
-                            <div id="sharedBtns">
-                                <button id="btnCreateSendTransport">4. Create Send Transport</button>
-                                <br />
-                                <button id="btnConnectSendTransport">5. Connect Send Transport & Produce</button></td>
-                            </div>
-                        <td>
-                            <div id="sharedBtns">
-                                <button id="btnRecvSendTransport">6. Create Recv Transport</button>
-                                <br />
-                                <button id="btnConnectRecvTransport">7. Connect Recv Transport & Consume</button>
-                            </div>
-                        </td>
-                    </tr> -->
                 </tbody>
             </table>
             <div id="closeCallBtn">

public/index.js

@@ -10,147 +10,192 @@ const ASSET_NAME = urlParams.get('assetName') || null;
 const ASSET_TYPE = urlParams.get('assetType') || null;
 let callId = parseInt(urlParams.get('callId')) || null;
 const IS_PRODUCER = urlParams.get('producer') === 'true' ? true : false
+let remoteVideo = document.getElementById('remoteVideo')
+remoteVideo.defaultMuted = true
+let produceAudio = false
+
 console.log('[URL] ASSET_ID', ASSET_ID, '| ACCOUNT_ID', ACCOUNT_ID, '| callId', callId, ' | IS_PRODUCER', IS_PRODUCER)
 
-let socket 
+console.log('🟩 config', config)
-hub = io(config.hubAddress)
 
-const connectToMediasoup = () => {
+produceAudioSelector = document.getElementById('produceAudio');
-
+produceAudioSelector.addEventListener('change', e => {
-  socket = io(config.mediasoupAddress, {
+    if(e.target.checked) {
-    reconnection: true,
+      produceAudio = true
-    reconnectionDelay: 1000,
+      console.log('produce audio');
-    reconnectionDelayMax : 5000,
+    } else {
-    reconnectionAttempts: Infinity
+      produceAudio = false
-  })
-
-  socket.on('connection-success', ({ _socketId, existsProducer }) => {
-    console.log(`[MEDIA] ${config.mediasoupAddress} | connected: ${socket.connected} | existsProducer: ${existsProducer}`)
-    if (!IS_PRODUCER && existsProducer && consumer === undefined) { 
-      goConnect()
-      // document.getElementById('btnRecvSendTransport').click();
     }
-    if (IS_PRODUCER && urlParams.get('testing') === 'true') { getLocalStream() }
+});
-  })
-}
-
-if (IS_PRODUCER === true) {
-  hub.on('connect', async () => {
-    console.log(`[HUB] ${config.hubAddress} | connected: ${hub.connected}`)
-    connectToMediasoup()
-
-    hub.emit(
-      'ars',
-      JSON.stringify({
-        ars: true,
-        asset_id: ASSET_ID,
-        account_id: ACCOUNT_ID,
-      })
-    )
-  
-    hub.on('video', (data) => {
-      const parsedData = JSON.parse(data);
-
-      if (parsedData.type === 'notify-request') {
-      console.log('video', parsedData)
-      originAssetId = parsedData.origin_asset_id;
-      // originAssetName = parsedData.origin_asset_name;
-      // originAssetTypeName = parsedData.origin_asset_type_name;
-      callId = parsedData.video_call_id;
-  
-        console.log('[VIDEO] notify-request | IS_PRODUCER', IS_PRODUCER, 'callId', callId);
-        getLocalStream()
-      }
-
-      if (parsedData.type === 'notify-end') {
-        console.log('[VIDEO] notify-end | IS_PRODUCER', IS_PRODUCER, 'callId', callId);
-        resetCallSettings()
-      }
-    })
-  })
-
-  hub.on('connect_error', (error) => {
-    console.log('connect_error', error);
-  });
-  
-  hub.on('connection', () => {
-    console.log('connection')
-  })
-  
-  hub.on('disconnect', () => {
-    console.log('disconnect')
-  })
-} else {
-  connectToMediasoup()
-}
 
+let socket, hub
 let device
 let rtpCapabilities
 let producerTransport
 let consumerTransport
-let producer
+let producerVideo
+let producerAudio
 let consumer
 let originAssetId
-// let originAssetName = 'Adi'
+let consumerVideo // local consumer video(consumer not transport)
-// let originAssetTypeName = 'linx'
+let consumerAudio // local consumer audio(consumer not transport)
+
+const remoteSoundControl = document.getElementById('remoteSoundControl');
+
+remoteSoundControl.addEventListener('click', function handleClick() {
+  console.log('remoteSoundControl.textContent', remoteSoundControl.textContent);
+  if (remoteSoundControl.textContent === 'Unmute') {
+    remoteVideo.muted = false
+    remoteSoundControl.textContent = 'Mute';
+  } else {
+    remoteVideo.muted = true
+    remoteSoundControl.textContent = 'Unmute';
+  }
+});
 
 // https://mediasoup.org/documentation/v3/mediasoup-client/api/#ProducerOptions
 // https://mediasoup.org/documentation/v3/mediasoup-client/api/#transport-produce
-let params = {
+let videoParams = {
-  // mediasoup params
   encodings: [
-    {
+    { scaleResolutionDownBy: 4, maxBitrate: 500000 },
-      rid: 'r0',
+    { scaleResolutionDownBy: 2, maxBitrate: 1000000 },
-      maxBitrate: 100000,
+    { scaleResolutionDownBy: 1, maxBitrate: 5000000 },
-      scalabilityMode: 'S1T3',
+    { scalabilityMode: 'S3T3_KEY' }
-    },
-    {
-      rid: 'r1',
-      maxBitrate: 300000,
-      scalabilityMode: 'S1T3',
-    },
-    {
-      rid: 'r2',
-      maxBitrate: 900000,
-      scalabilityMode: 'S1T3',
-    },
   ],
-  // https://mediasoup.org/documentation/v3/mediasoup-client/api/#ProducerCodecOptions
   codecOptions: {
     videoGoogleStartBitrate: 1000
   }
 }
 
-const streamSuccess = (stream) => {
+let audioParams = {
-  console.log('[streamSuccess]');
+  codecOptions :
-  localVideo.srcObject = stream
+  {
-  const track = stream.getVideoTracks()[0]
+    opusStereo : true,
-  params = {
+    opusDtx    : true
-    track,
-    ...params
   }
+}
+
+setTimeout(() => {
+  hub = io(config.hubAddress)
+  
+  const connectToMediasoup = () => {
+  
+    socket = io(config.mediasoupAddress, {
+      reconnection: true,
+      reconnectionDelay: 1000,
+      reconnectionDelayMax : 5000,
+      reconnectionAttempts: Infinity
+    })
+  
+    socket.on('connection-success', ({ _socketId, existsProducer }) => {
+      console.log(`[MEDIA] ${config.mediasoupAddress} | connected: ${socket.connected} | existsProducer: ${existsProducer}`)
+      if (!IS_PRODUCER && existsProducer && consumer === undefined) { 
+        goConnect()
+      }
+      if (IS_PRODUCER && urlParams.get('testing') === 'true') { getLocalStream() }
+    })
+
+    socket.on('new-producer', ({ callId }) => {
+      console.log(`🟢 new-producer | callId: ${callId} | Ready to consume`);
+      consume()
+    })
+  }
+  
+  if (IS_PRODUCER === true) {
+    hub.on('connect', async () => {
+      console.log(`[HUB]! ${config.hubAddress} | connected: ${hub.connected}`)
+      connectToMediasoup()
+  
+      hub.emit(
+        'ars',
+        JSON.stringify({
+          ars: true,
+          asset_id: ASSET_ID,
+          account_id: ACCOUNT_ID,
+        })
+      )
+    
+      hub.on('video', (data) => {
+        const parsedData = JSON.parse(data);
+  
+        if (parsedData.type === 'notify-request') {
+        console.log('video', parsedData)
+        originAssetId = parsedData.origin_asset_id;
+        // originAssetName = parsedData.origin_asset_name;
+        // originAssetTypeName = parsedData.origin_asset_type_name;
+        callId = parsedData.video_call_id;
+    
+          console.log('[VIDEO] notify-request | IS_PRODUCER', IS_PRODUCER, 'callId', callId);
+          getLocalStream()
+        }
+  
+        if (parsedData.type === 'notify-end') {
+          console.log('[VIDEO] notify-end | IS_PRODUCER', IS_PRODUCER, 'callId', callId);
+          resetCallSettings()
+        }
+      })
+    })
+  
+    hub.on('connect_error', (error) => {
+      console.log('connect_error', error);
+    });
+    
+    hub.on('connection', () => {
+      console.log('connection')
+    })
+    
+    hub.on('disconnect', () => {
+      console.log('disconnect')
+    })
+  } else {
+    connectToMediasoup()
+  }
+
+}, 1600);
+
+const streamSuccess = (stream) => {
+  console.log('[streamSuccess] device', device);
+  localVideo.srcObject = stream
+  console.log('stream', stream);
+  const videoTrack = stream.getVideoTracks()[0]
+  const audioTrack = stream.getAudioTracks()[0]
+
+  videoParams = {
+    track: videoTrack,
+    ...videoParams
+  }
+
+  audioParams = {
+    track: audioTrack,
+    ...audioParams
+  }
+
+  console.log('[streamSuccess] videoParams', videoParams, ' | audioParams', audioParams);
   goConnect()
 }
 
 const getLocalStream = () => {
   console.log('[getLocalStream]');
   navigator.mediaDevices.getUserMedia({
-    audio: false,
+    audio: produceAudio ? true : false,
     video: {
-      width: {
+      qvga : { width: { ideal: 320 }, height: { ideal: 240 } },
-        min: 640,
+      vga  : { width: { ideal: 640 }, height: { ideal: 480 } },
-        max: 1920,
+      hd   : { width: { ideal: 1280 }, height: { ideal: 720 } }
-      },
-      height: {
-        min: 400,
-        max: 1080,
-      }
     }
   })
   .then(streamSuccess)
   .catch(error => {
     console.log(error.message)
   })
+
+  navigator.permissions.query(
+    { name: 'microphone' }
+  ).then((permissionStatus) =>{
+    console.log('🟨 [PERMISSION] permissionStatus', permissionStatus); // granted, denied, prompt
+    // It will block the code from execution and display "Permission denied" if we don't have microphone permissions
+  })
+
 }
 
 const goConnect = () => {
@@ -167,7 +212,6 @@ const goCreateTransport = () => {
 // server side to send/recive media
 const createDevice = async () => {
   try {
-    console.log('[createDevice]');
     device = new mediasoupClient.Device()
 
     // https://mediasoup.org/documentation/v3/mediasoup-client/api/#device-load
@@ -178,7 +222,8 @@ const createDevice = async () => {
     })
 
     console.log('Device RTP Capabilities', device.rtpCapabilities)
-
+    console.log('[createDevice] device', device);
+    
     // once the device loads, create transport
     goCreateTransport()
 
@@ -207,18 +252,20 @@ const getRtpCapabilities = () => {
 }
 
 const createSendTransport = () => {
+  console.log('[createSendTransport');
   // see server's socket.on('createWebRtcTransport', sender?, ...)
   // this is a call from Producer, so sender = true
-  socket.emit('createWebRtcTransport', { sender: true, callId }, ({ params }) => {
+  socket.emit('createWebRtcTransport', { sender: true }, (value) => {
+
+    console.log(`[createWebRtcTransport] value: ${JSON.stringify(value)}`);
+
+    const params = value.params;
     // The server sends back params needed 
     // to create Send Transport on the client side
     if (params.error) {
       console.log(params.error)
       return
     }
-
-    console.log(params)
-
     // creates a new WebRTC Transport to send media
     // based on the server's producer transport params
     // https://mediasoup.org/documentation/v3/mediasoup-client/api/#TransportOptions
@@ -244,10 +291,10 @@ const createSendTransport = () => {
     })
 
     producerTransport.on('produce', async (parameters, callback, errback) => {
-      console.log(parameters)
+      console.log('[produce] parameters', parameters)
 
       try {
-        // tell the server to create a Producer
+        // Tell the server to create a Producer
         // with the following parameters and produce
         // and expect back a server side producer id
         // see server's socket.on('transport-produce', ...)
@@ -270,21 +317,45 @@ const createSendTransport = () => {
 }
 
 const connectSendTransport = async () => {
-  // we now call produce() to instruct the producer transport
+
+  console.log('[connectSendTransport] producerTransport');
+
+  // We now call produce() to instruct the producer transport
   // to send media to the Router
   // https://mediasoup.org/documentation/v3/mediasoup-client/api/#transport-produce
   // this action will trigger the 'connect' and 'produce' events above
-  producer = await producerTransport.produce(params)
+  
+  // Produce video
+  let producerVideoHandler = await producerTransport.produce(videoParams)
+  console.log('videoParams', videoParams);
+  console.log('producerVideo', producerVideo);
 
-  producer.on('trackended', () => {
+  producerVideoHandler.on('trackended', () => {
     console.log('track ended')
     // close video track
-  })
+  })  
 
-  producer.on('transportclose', () => {
+  producerVideoHandler.on('transportclose', () => {
     console.log('transport ended')
     // close video track
-  })
+  })    
+  
+  // Produce audio
+  if (produceAudio) {
+    let producerAudioHandler = await producerTransport.produce(audioParams)
+    console.log('audioParams', audioParams);
+    console.log('producerAudio', producerAudio);
+  
+    producerAudioHandler.on('trackended', () => {
+      console.log('track ended')
+      // close audio track
+    })
+  
+    producerAudioHandler.on('transportclose', () => {
+      console.log('transport ended')
+      // close audio track
+    })
+  }
 
   const answer = {
     origin_asset_id: ASSET_ID,
@@ -294,7 +365,7 @@ const connectSendTransport = async () => {
     origin_asset_type_name: ASSET_TYPE,
     origin_asset_name: ASSET_NAME,
     video_call_id: callId,
-    answer: 'accepted', // answer: 'rejected'
+    answer: 'accepted', // answer: accepted/rejected
   };
   console.log('SEND answer', answer);
 
@@ -310,7 +381,7 @@ const connectSendTransport = async () => {
 
 const createRecvTransport = async () => {
   console.log('createRecvTransport');
-  // see server's socket.on('consume', sender?, ...)
+  // See server's socket.on('consume', sender?, ...)
   // this is a call from Consumer, so sender = false
   await socket.emit('createWebRtcTransport', { sender: false, callId }, ({ params }) => {
     // The server sends back params needed 
@@ -320,15 +391,15 @@ const createRecvTransport = async () => {
       return
     }
 
-    console.log(params)
+    console.log('[createRecvTransport] params', params)
 
-    // creates a new WebRTC Transport to receive media
+    // Creates a new WebRTC Transport to receive media
     // based on server's consumer transport params
     // https://mediasoup.org/documentation/v3/mediasoup-client/api/#device-createRecvTransport
     consumerTransport = device.createRecvTransport(params)
 
     // https://mediasoup.org/documentation/v3/communication-between-client-and-server/#producing-media
-    // this event is raised when a first call to transport.produce() is made
+    // This event is raised when a first call to transport.produce() is made
     // see connectRecvTransport() below
     consumerTransport.on('connect', async ({ dtlsParameters }, callback, errback) => {
       try {
@@ -353,7 +424,8 @@ const resetCallSettings = () => {
   localVideo.srcObject = null
   remoteVideo.srcObject = null
   consumer = null
-  producer = null
+  producerVideo = null
+  producerAudio = null
   producerTransport = null
   consumerTransport = null
   device = undefined
@@ -361,40 +433,101 @@ const resetCallSettings = () => {
 
 const connectRecvTransport = async () => {
   console.log('connectRecvTransport');
-  // for consumer, we need to tell the server first
+  // For consumer, we need to tell the server first
   // to create a consumer based on the rtpCapabilities and consume
   // if the router can consume, it will send back a set of params as below
   await socket.emit('consume', {
     rtpCapabilities: device.rtpCapabilities,
     callId
-  }, async ({ params }) => {
+  }, async ({videoParams, audioParams}) => {
-    if (params.error) {
+    console.log(`[consume] 🟩 videoParams`, videoParams)
-      console.log('Cannot Consume')
+    console.log(`[consume] 🟩 audioParams`, audioParams)
-      return
+    console.log('[consume] 🟩 consumerTransport', consumerTransport)
-    }
-
-    // then consume with the local consumer transport
-    // which creates a consumer
-    consumer = await consumerTransport.consume({
-      id: params.id,
-      producerId: params.producerId,
-      kind: params.kind,
-      rtpParameters: params.rtpParameters
-    })
-
-    // destructure and retrieve the video track from the producer
-    const { track } = consumer
 
     let stream = new MediaStream()
-    stream.addTrack(track)
-    // stream.removeTrack(track)
-    remoteVideo.srcObject = stream
-    socket.emit('consumer-resume')
-    console.log('consumer', consumer);
 
+    // Maybe the unit does not produce video or audio, so we must only consume what is produced
+    if (videoParams) {
+      console.log('❗ Have VIDEO stream to consume');
+      stream.addTrack(await getVideoTrask(videoParams))
+    } else {
+      console.log('❗ Don\'t have VIDEO stream to consume');
+    }
+    
+    if (audioParams) {
+      console.log('❗ Have AUDIO stream to consume');
+      let audioTrack = await getAudioTrask(audioParams)
+      stream.addTrack(audioTrack)
+    } else {
+      console.log('❗ Don\'t have AUDIO stream to consume');
+    }
+
+    socket.emit('consumer-resume')
+
+    remoteVideo.srcObject = stream
+    remoteVideo.setAttribute('autoplay', true)
+
+    remoteVideo.play()
+    .then(() => {
+      console.log('remoteVideo PLAY')
+    })
+    .catch((error) => {
+      displayError(`remoteVideo PLAY ERROR | ${error.message}`)
+    })
   })
 }
 
+const getVideoTrask = async (videoParams) => {
+  consumerVideo = await consumerTransport.consume({
+    id: videoParams.id,
+    producerId: videoParams.producerId,
+    kind: videoParams.kind,
+    rtpParameters: videoParams.rtpParameters
+  }) 
+
+  consumerVideo.on('transportclose', () => {
+    console.log('transport closed so consumer closed')
+  })
+
+  return consumerVideo.track
+}
+
+const getAudioTrask = async (audioParams) => {
+  consumerAudio = await consumerTransport.consume({
+    id: audioParams.id,
+    producerId: audioParams.producerId,
+    kind: audioParams.kind,
+    rtpParameters: audioParams.rtpParameters
+  })
+
+  consumerAudio.on('transportclose', () => {
+    console.log('transport closed so consumer closed')
+  })
+
+  const audioTrack = consumerAudio.track
+
+  audioTrack.applyConstraints({
+    audio: {
+      advanced: [
+        {
+          echoCancellation: {exact: true}
+        },
+        {
+          autoGainControl: {exact: true}
+        },
+        {
+          noiseSuppression: {exact: true}
+        }, 
+        {
+          highpassFilter: {exact: true}
+        }
+      ]
+    }
+  })
+
+  return audioTrack
+}
+
 const closeCall = () => {
   console.log('closeCall');
   
@@ -416,6 +549,30 @@ const closeCall = () => {
   resetCallSettings()
 }
 
+const consume = async () => {
+  console.log('[consume]')
+  console.log('createRecvTransport Consumer')
+  await socket.emit('createWebRtcTransport', { sender: false, callId, dispatcher: true }, ({ params }) => {
+    if (params.error) {
+      console.log('createRecvTransport | createWebRtcTransport | Error', params.error)
+      return
+    }
+    consumerTransport = device.createRecvTransport(params)
+    consumerTransport.on('connect', async ({ dtlsParameters }, callback, errback) => {
+      try {
+        await socket.emit('transport-recv-connect', {
+          dtlsParameters,
+        })
+        callback()
+      } catch (error) {
+        errback(error)
+      }
+    })
+    
+    connectRecvTransport()
+  })
+}
+
 btnLocalVideo.addEventListener('click', getLocalStream)
-btnRecvSendTransport.addEventListener('click', goConnect)
+btnRecvSendTransport.addEventListener('click', consume)
 btnCloseCall.addEventListener('click', closeCall)