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• How to broadcast live audio in node js (1 to many)

  19 juin 2020, par Yousef Alaqra

  I'm trying stream live audio to a wide range of clients in a web browser.

  



  My current solution :

  



  Dotnet core 3.1 console application

  



  

  1. receive the audio data over UDP

  


  2. trimming the first 28 bytes of each received packet

  


  3. and send the processed packet over UDP.

  


  



  Node JS

  



  

  1. execute a Ffmepg as a child process to receive audio data packets
over UDP from the console app, and encode each packet to audio WAV
format

  


  2. Pipe out the result of the child process into a GET HTTP endpoint response

  


  



  Browser

  



  

  1. HTML audio element with source value equals to the node js GET
endpoint

  


  



  Problem :

  



  The solution is giving a good result, but only for one device(one to one), which is not what I want to achieve.

  



  I've tried many solutions to make it applicable to a wide range of devices, such as using working threads and forking a child process, but none of them changes the result.

  



  I believe that I've to make some changes to the node js implementation, so here I'll share it with you, hoping to get a clue to solve the problem.

  



  var express = require("express");
var app = express();
var children = require("child_process");

var port = 5001;
var host = "192.168.1.230";

app.listen(port, host, () => {
  console.log("Server running at http://" + host + ":" + port + "/");
});

app.get('/stream', (req, res) => {
  const ffmpegCommand = "ffmpeg";
  var ffmpegOptions =
    "-f s16le -ar 48000 -ac 2 -i udp://192.168.1.230:65535 -f wav -";

  var ffm = children.spawn(ffmpegCommand, ffmpegOptions.split(" "));

  res.writeHead(200, { "Content-Type": "audio/wav; codecs=PCM" });
  ffm.stdout.pipe(res);
});


  



  If someone interested to see the full implementation, please let me know.

  


• How do I broadcast live audio in Node.js ?

  20 juin 2020, par Yousef Alaqra

  I'm trying stream live audio to a wide range of clients in a web browser.

  



  My current solution :

  



  Dotnet core 3.1 console application

  



  

  1. receive the audio data over UDP

  


  2. trimming the first 28 bytes of each received packet

  


  3. and send the processed packet over UDP.

  


  



  Node JS

  



  

  1. execute a Ffmepg as a child process to receive audio data packets
over UDP from the console app, and encode each packet to audio WAV
format

  


  2. Pipe out the result of the child process into a GET HTTP endpoint response

  


  



  Browser

  



  

  1. HTML audio element with source value equals to the node js GET
endpoint

  


  



  Problem :

  



  The solution is giving a good result, but only for one device(one to one), which is not what I want to achieve.

  



  I've tried many solutions to make it applicable to a wide range of devices, such as using working threads and forking a child process, but none of them changes the result.

  



  I believe that I've to make some changes to the node js implementation, so here I'll share it with you, hoping to get a clue to solve the problem.

  



  var express = require("express");
var app = express();
var children = require("child_process");

var port = 5001;
var host = "192.168.1.230";

app.listen(port, host, () => {
  console.log("Server running at http://" + host + ":" + port + "/");
});

app.get('/stream', (req, res) => {
  const ffmpegCommand = "ffmpeg";
  var ffmpegOptions =
    "-f s16le -ar 48000 -ac 2 -i udp://192.168.1.230:65535 -f wav -";

  var ffm = children.spawn(ffmpegCommand, ffmpegOptions.split(" "));

  res.writeHead(200, { "Content-Type": "audio/wav; codecs=PCM" });
  ffm.stdout.pipe(res);
});


  



  If someone interested to see the full implementation, please let me know.

  


• stream webcam using ffmpeg to live555

  16 juin 2014, par John Qualis

  I am new to live555.

  I want to stream my webcam from a windows 7 (64-bit) machine behind home LAN using ffmpeg as the encoder to a live555 server running on a Debian 64-bit linux machine in a data center over the WAN. I want to send a H.264 RTP/UDP stream from ffmpeg and the "testOnDemandRTSPServer" should send out RTSP streams to clients that connect to it.

  I am using the following ffmpeg command which sends UDP data to port 1234, IP address AA.BB.CC.DD

  .\ffmpeg.exe -f dshow -i video="Webcam C170":audio="Microphone (3- Webcam C170)" -an 
  
   -vcodec libx264 -f mpegts udp://AA.BB.CC.DD:1234

  On the linux server I am running the testOnDemandRTSPServer on port 5555 which expects raw UDP data from from AA:BB:CC:DD:1234. I try to open the rtsp stream in VLC using rtsp://AA.BB.CC.DD:5555/mpeg2TransportStreamFromUDPSourceTest

  But I get nothing in VLC. What am I doing wrong ? How can I fix it ?