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• Node.js Stream Mp3 to http without having to save file

  21 août 2016, par user2758113

  I am trying to stream just audio from a youtube link straight to http with node.js.

  My code looks like this, I am using express 4.0.

  var express = require('express');
  
  var router = express.Router();
  
  var ytdl = require('ytdl');
  
  var ffmpeg = require('fluent-ffmpeg');
  
  var fs = require('fs');
  
  
  
  router.get('/', function(req, res) {
  
  
  
    var url = 'https://www.youtube.com/watch?v=GgcHlZsOgQo';
  
    var video = ytdl(url)
  
  
  
    res.set({
  
        "Content-Type": "audio/mpeg"
  
    })
  
  
  
    new ffmpeg({source: video})
  
        .toFormat('mp3')
  
        .writeToStream(res, function(data, err) {
  
          if (err) console.log(err)
  
        })
  
  
  
  });
  
  
  
  module.exports = router;

  Now, I’m able to stream the video’s audio to the response if I save the file then pipe it to the response, but I’d rather try to figure out some way to go from downloading to ffmpeg to response.

  Not sure if this is possible. The main goal is to keep it as light weight as possible, and not have to read from files.

  I’ve seen this code which is essentially what I’d like to do minus the saving to a file part.

  

• how to convert any audio file to wav on server side with node.js [on hold]

  9 juin 2014, par pufmaigre

  my dear stackoverflow

  I spent hours looking for an efficient and pretty way to transcode audio on server side, and I found a lot of informations... actually too much informations.

  Sox for Node.js looks fine but there are not so much documentation, I was unable to convert a mp3 to wav with it :

  https://www.npmjs.org/package/sox

  Then fluent ffmpeg sounds good but I have the feeling I will loose a lot of time to achieve my goal with it :

  https://github.com/fluent-ffmpeg/node-fluent-ffmpeg

  and then i found some more obscure stuff like those ones :

  https://github.com/andrewrk/node-plan-transcode

  https://github.com/benvanik/node-transcoding

  I’m not sure it’s really the "stackoverflow spirit" but I’m asking you wich way would you choose to achieve my goal because I’m feeling lost in the codec jungle.

  thanks in advance !! love :)

• Why can my incoming UDP stream only be saved as audio ?

  11 juin 2014, par Boehmi

  Currently I’m trying to get the following process working :

  1) Send a stream of my desktop from PC A to PC B

  2) Have PC B stream the incoming data to HTTP (localhost:8080/test.filename)

  3) Now the goal is to access the HTTP stream and get what I’ve originally sent off from PC A

  The problem I have with this is : At PC B, I get both my video and my audio track properly received - I can play it with FFMPEG or VLC too, no problem.
  But now when I try to either stream it to HTTP via VLC or save it as a file with VLC/FFMPEG, all it contains is is the audio track. The video track has completely vanished from the picture. VLC and ffmpeg only show me that there is an audio track in, as well.

  I’ve tried this with : h264/mp4, vp8/webm, theora/ogg, and with all of these I’ve had the problem of just the audio track being left. What is happening here ? My current commandline to stream from PC A to PC B is

  ffmpeg -f dshow -i audio="virtual-audio-capturer":video="screen-capture-recorder" -vcodec libx264 -b:v 500K -vf crop=400:300:0:0 -r 15 -strict -2-c:a libmp3lame -b:a 128k -bsf:v h264_mp4toannexb -maxrate 750k -bufsize 3000k -f mpegts udp://127.0.0.1:5004

  However, I’ve tried many command lines with different settings, but I simply can’t find the right ones.