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• NodeJS : Fail to write byte array input from webcam to ffmpeg spawn process

  23 mai 2024, par Thanesh Prabaghan

  I'm using NodeJS server to display an HTML page which has webcam option. Once user visited to my NodeJS server, it will serve html page. User can allow webcam option and see webcam view on the page.

  


  In the backend, I send webcam stream (byte array) using socket.io. I receive byte array successfully in backend with the help of socket.io. BUT MY PROBLEM IS, I can't pipe this byte array to the ffmpeg spawn process. I don't know how to properly pipe this data to the ffmpeg. Once it done, all my problem will be solved.

  


  On the other side, I have node-media-server as RTMP server to publish this stream to VLC player and other devices. Kindly help me to complete this task. I will attach all my code to this question. Kindly run this in your environment and answer the question.

  


  MY HTML PAGE

  


  &#xA;&#xA;  &#xA;    &#xA;      &#xA;&#xA;      &#xA;&#xA;      <code class="echappe-js">&lt;script src=&quot;https://cdn.socket.io/4.7.5/socket.io.min.js&quot; &amp;#xA;        integrity=&quot;integrity_code&quot; &amp;#xA;        crossorigin=&quot;anonymous&quot;&gt;&lt;/script&gt;&#xA;    &#xA;    &#xA;      
  &#xA;        &#xA;&#xA;        &lt;script&gt;&amp;#xA;          const socket = io(&amp;#x27;http://localhost:8080/&amp;#x27;);&amp;#xA;          var video = document.getElementById(&quot;video&quot;);&amp;#xA;&amp;#xA;          if (navigator.mediaDevices.getUserMedia) {&amp;#xA;            navigator.mediaDevices.getUserMedia({ video: true, audio:true })&amp;#xA;            .then(function (stream) {&amp;#xA;              const recorder = new MediaRecorder(stream);&amp;#xA;&amp;#xA;              recorder.ondataavailable = event =&gt; {&amp;#xA;                socket.emit(&amp;#x27;VideoStream&amp;#x27;, event.data);&amp;#xA;              };&amp;#xA;              recorder.start(1000);      &amp;#xA;              video.srcObject = stream;&amp;#xA;            }).catch(function (error) {&amp;#xA;              console.log(&quot;Something went wrong!&quot;);&amp;#xA;            });&amp;#xA;         }  &amp;#xA;       &lt;/script&gt;&#xA;    &#xA;&#xA;&#xA;
  

  


  FFMPEG IMPLEMENTATION

  


  const express = require('express');
const app = express();
const http = require('http');
const server = http.createServer(app);
const { Server } = require("socket.io");
const io = new Server(server);
const path = require('node:path'); 
const { spawn } = require('node:child_process');

let cmd = spawn('ffmpeg.exe', [
    '-c:v', 'copy', '-preset', 'ultrafast', '-tune', 'zerolatency',
    '-c:a', 'aac', '-strict', '-2', '-ar', '44100', '-b:a', '64k',
    '-y',
    '-use_wallclock_as_timestamps', '1',
    '-async', '1',
    '-flush_packets', '1',
    '-rtbufsize', '1000',
    '-bufsize', '1000',
    '-f', 'flv',
     '-i','-',
    'rtmp://localhost:1935',
  ]);

app.use(express.static(path.join(__dirname, 'public')));

app.get('/', (req, res) => {
  res.sendFile(path.join(__dirname + 'index.html'));
});

io.on('connection', (socket) => {
  socket.on("VideoStream", (data) => {
    cmd.stdin.write(data);
  });
});

server.listen(8080, () => {
  console.log('listening on *:8080');
});

```
**NODE MEDIA SERVER IMPLEMENTATION**

```
const NodeMediaServer = require('node-media-server');

const config = {
  rtmp: {
    port: 1935,
    chunk_size: 60000,
    gop_cache: true,
    ping: 30,
    ping_timeout: 60
  },
  http: {
    port: 8000,
    allow_origin: '*'
  }
};

var nms = new NodeMediaServer(config)
nms.run();
```




  


• Révision 115006 : version 1.3.5 : le champ imessage passe dans le core ref #4303

  17 avril 2019, par bruno@eliaz.fr

• Révision 24293 : Fix #4303 : basculer le champ imessage dans le core

  17 avril 2019, par b b

  suite de https://zone.spip.net/trac/spip-zone/changeset/115006