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• NodeJS fluent-ffmpeg + ytdl-core

  22 décembre 2019, par hydr8

  I’m trying to write a very simple youtube converter/downloader in NodeJS.

  So I wrote a srv.js File with Express to handle the whole Website stuff (Requests etc). In this file I also handle a post request on the url+’/download’ which receives the youtube url via a HTML form from the the main page. Within this POST handling I included a function from my api.js.

  In the api.js in defined some functions I want to use during the whole process. One of them is responsible for converting a downloaded audio file from youtube. Almost everything is working fine except one thing.

  As soon as the user submits the url and is directed to the mentioned ’/download’-site, he will see that the download is in progress and that he will be referred to the download asap. So far so good. The file will be downloaded and converted without any problems.

  But as soon as the file is downloaded and converted the the user will not be redirected to a following site.

  I tried already a lot of stuff with the ffmpeg events (end, saveToFile, save etc) but I can’t establish a working solution, that as soon as the file is completeley downloaded the user will be rteferred to the next website.

  Maybe someone can give me a hint or some suggestion how to proceed.

  srv.js :

  ........
  
  // This is the Handler which calls the function from the api.js file
  
  // After the execution of this process I need to load a new page
  
  app.post('/download', function(req, res){
  
    res.sendFile(path.join(__dirname + '/views/download.html'));
  
      api.downloadConverter(req.body.url)
  
    });
  
  ........

  api.js :

  ........
  
    downloadConverter: function(url){
  
  
  
      console.log("Downloading File from: " + url);
  
      ffmpeg()
  
        .input(ytdl(url), {
  
          ... options ....
  
         })
  
  
  
   ....    some processing ....
  
        .on('end', () => {
  
          console.log("Download Done!");
  
        })
  
        .save('./files/file.mp4')
  
    }
  
  
  
  ......

  I tried a lot with the events of the function in api.js. To return vaulues to the srv.js etc but nothings seems to work.

  Edit

  Of course I did already a lot of research on SO and other NodeJS related sites. But without any help. And I can’t provide tests of possible solutions of the last two days because I didn’t save them and I’m too lazy to retry every step I tried and provide codes with non-working solutions.

• NodeJS + FFMPEG -sending response when FFMPEG is completed

  2 février 2015, par eco_bach

  I have a working NodeJS+FFMPEG application. I am able to upload video files and have them converted on the server. I am using this NodeJS FFMPEG library
  https://github.com/fluent-ffmpeg/node-fluent-ffmpeg

  I get a message on the server when the job is complete, but how do I notify the client ?? In this case a simple AIR application. Right now I can only ’hear’ the initial response after a successful upload.

  The initial video file was uploaded via a http POST request.

  My primary node application without the dependencies is as follows

  var ffmpeg =  require('./lib/fluent-ffmpeg');
  
  
  
  var express = require('express'),
  
      multer  = require('multer');
  
  var app = express();
  
  
  
  //auto save file to uploads folder
  
  app.use(multer({ dest: './uploads/'}))
  
  
  
  var temp;
  
  
  
  app.post('/', function (req, res) {
  
      console.log(req.body); //contains the variables
  
      console.log("req.files ="+ req.files); //contains the file references
  
  
  
  console.log("req.files.Filedata.path ="+ req.files.Filedata.path ); 
  
  
  
  temp=req.files.Filedata.path;
  
  // make sure you set the correct path to your video file
  
  var proc = ffmpeg('./'+temp)
  
    // set video bitrate
  
    .videoBitrate(1024)
  
    // set audio codec
  
    .audioCodec('libmp3lame')    
  
    // set output format to force
  
    .format('avi')
  
  
  
  
  
    // setup event handlers
  
    .on('end', function() {
  
     console.log('file has been converted succesfully');    
  
    })
  
    .on('error', function(err) {
  
      console.log('an error happened: ' + err.message);
  
    })
  
  
  
  
  
    // save to file
  
    .save('./converted/converted.avi');
  
      res.send('Thank you for uploading!');
  
  
  
  });
  
  
  
  app.listen(8080);

• On-the-fly transcoding using derolf/transcoder

  8 septembre 2015, par user1811678

  https://github.com/derolf/transcoder

  I need to transcode locally and playback locally in my project, no other external connection to the server.
  It is a good source of doing on the fly transcoding by ffmpeg.

  In my case i have to transcode it to mp4 as it could perform faster.
  However i run into following problem, and i need some help in here to fix it.

  ----------------------------------------
  
  Exception happened during processing of request from ('127.0.0.1', 34089)
  
  Traceback (most recent call last):
  
    File "/usr/lib/python2.7/SocketServer.py", line 593, in process_request_thread
  
      self.finish_request(request, client_address)
  
    File "/usr/lib/python2.7/SocketServer.py", line 334, in finish_request
  
      self.RequestHandlerClass(request, client_address, self)
  
    File "/usr/lib/python2.7/SocketServer.py", line 651, in __init__
  
      self.finish()
  
    File "/usr/lib/python2.7/SocketServer.py", line 710, in finish
  
      self.wfile.close()
  
    File "/usr/lib/python2.7/socket.py", line 279, in close
  
      self.flush()
  
    File "/usr/lib/python2.7/socket.py", line 303, in flush
  
      self._sock.sendall(view[write_offset:write_offset+buffer_size])
  
  error: [Errno 32] Broken pipe

  Here is my code :
  server.py

      from flask import Flask, request, Response, abort, send_file, jsonify
  
  import os, subprocess, re
  
  import config
  
  
  
  app = Flask(__name__)
  
  
  
  @app.route('/media/.js')
  
  def media_content_js(path):
  
      d= os.path.abspath( os.path.join( config.media_folder, path ) )
  
      print d
  
      if not os.path.isfile( d ): abort(404)
  
      cmdline= list()
  
      cmdline.append( config.ffmpeg )
  
      cmdline.append( "-i" )
  
      cmdline.append( d );
  
      print cmdline
  
      duration= -1
  
      FNULL = open(os.devnull, 'w')
  
      proc= subprocess.Popen( cmdline, stderr=subprocess.PIPE, stdout=FNULL )
  
      try:
  
          for line in iter(proc.stderr.readline,''):
  
              line= line.rstrip()
  
              #Duration: 00:00:45.13, start: 0.000000, bitrate: 302 kb/s
  
              m = re.search('Duration: (..):(..):(..)\...', line)
  
              if m is not None: duration= int(m.group(1)) * 3600 + int(m.group(2)) * 60 + int(m.group(3)) + 1
  
      finally:
  
          proc.kill()
  
  
  
      return jsonify(duration=duration)
  
  
  
  @app.route('/media/.mp4')
  
  def media_content_ogv(path):
  
      d= os.path.abspath( os.path.join( config.media_folder, path ) )
  
      print d
  
      if not os.path.isfile( d ): abort(404)
  
      start= request.args.get("start") or 0
  
      print start
  
      def generate():
  
          cmdline= list()
  
          cmdline.append( config.ffmpeg )
  
          cmdline.append( "-i" )
  
          cmdline.append( d );
  
          cmdline.append( "-ss" )
  
          cmdline.append( str(start) );
  
          cmdline.extend( config.ffmpeg_args )
  
          print cmdline
  
          FNULL = open(os.devnull, 'w')
  
          proc= subprocess.Popen( cmdline, stdout=subprocess.PIPE, stderr=FNULL )
  
          try:
  
              f= proc.stdout
  
              byte = f.read(512)
  
              while byte:
  
                  yield byte
  
                  byte = f.read(512)
  
          finally:
  
              proc.kill()
  
  
  
      return Response(response=generate(),status=200,mimetype='video/mp4',headers={'Access-Control-Allow-Origin': '*', "Content-Type":"video/mp4","Content-Disposition":"inline","Content-Transfer-Enconding":"binary"})
  
  
  
  @app.route('/', defaults={"path":"index.html"})
  
  @app.route('/')
  
  def static_content(path):
  
      d= os.path.abspath( os.path.join( config.static_folder, path ) )
  
      if not os.path.isfile( d ): abort(404)
  
      return send_file( d )
  
  
  
  app.run( host="0.0.0.0",port=config.port, threaded=True, debug=True )

  config.py

  media_folder=   "media"
  
  static_folder=  "static"
  
  port=       8123
  
  ffmpeg=     "/usr/bin/ffmpeg"
  
  
  
  ffmpeg_args=    [ "-f", "avi" ,"-acodec", "libfdk_aac", "-b:a", "128k", "-vcodec", "libx264", "-b:v", "1200k" , "-flags" , "+aic+mv4", "pipe:1"]

  index.html

      
  
      <code class="echappe-js">&lt;script src=&quot;http://vjs.zencdn.net/4.5/video.js&quot;&gt;&lt;/script&gt;
      
  &lt;script src=&quot;http://code.jquery.com/jquery-1.9.1.min.js&quot;&gt;&lt;/script&gt;
      
  &lt;script&gt;<br />
  
          var video= videojs('video');<br />
  
          video.src(&quot;media/testavi.avi.mp4&quot;);<br />
  
  <br />
  
          // hack duration<br />
  
          video.duration= function() { return video.theDuration; };<br />
  
          video.start= 0;<br />
  
          video.oldCurrentTime= video.currentTime;<br />
  
          video.currentTime= function(time) <br />
  
          { <br />
  
              if( time == undefined )<br />
  
              {<br />
  
                  return video.oldCurrentTime() + video.start;<br />
  
              }<br />
  
              console.log(time)<br />
  
              video.start= time;<br />
  
              video.oldCurrentTime(0);<br />
  
              video.src(&quot;media/testavi.avi.mp4?start=&quot; + time);<br />
  
              video.play();<br />
  
              return this;<br />
  
          };<br />
  
  <br />
  
          $.getJSON( &quot;media/testavi.avi.js&quot;, function( data ) <br />
  
          {<br />
  
              video.theDuration= data.duration;<br />
  
          });<br />
  
      &lt;/script&gt;