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• Realtime video conversion using nodejs and ffmpeg

  2 février 2015, par LadislavM

  I’m trying to create very simple server-side video conversion using ffmpeg and nodejs.
  So far, I have 2 UDP servers, one for converting video input and second one for listening for converted video and passing it to websocket.

  I’ve created one UDP server, where stream comes, converts the video input by calling ffmpeg. Then the second UDP server get the converted video and pass it to the websocket server to stream video to browser.

  The problem is probably with input into the ffmpeg. The error I get is

  _stream_readable.js:476
  
    dest.on('unpipe', onunpipe);
  
         ^
  
  TypeError: Object 

  The code looks like this :

  // Websocket Server
  
  var socketServer = new (require('ws').Server)({port: 8081});
  
  socketServer.on('connection', function(socket) {
  
      socket.on('close', function(code, message){
  
          console.log( 'Disconnected WebSocket ('+socketServer.clients.length+' total)' );
  
      });
  
  });
  
  
  
  socketServer.broadcast = function(data, opts) {
  
      for( var i in this.clients ) {
  
          this.clients[i].send(data, opts);
  
      }
  
  };
  
  
  
  // UDP Server
  
  var udpServer = require("dgram").createSocket("udp4");
  
  
  
  udpServer.on("message", function(msg, rinfo) {
  
      socketServer.broadcast(msg, {binary:true});
  
      console.log("server got: " + msg + " from " + rinfo.address + ":" + rinfo.port);
  
  });
  
  
  
  udpServer.on("listening", function() {
  
      var address = udpServer.address();
  
      console.log("server listening " + address.address + ":" + address.port);
  
  });
  
  udpServer.bind(8082);
  
  
  
  // UDP Server for stream conversion
  
  var udpServer2 = require("dgram").createSocket("udp4");
  
  
  
  udpServer2.on("message", function(msg, rinfo) {
  
      // **********  THIS IS WHERE ERROR OCCURS **************
  
      var ffmpeg = require('child_process')
  
              .spawn('ffmpeg',['-f','video4linux2','-i','-','-f','mpeg1video','udp://127.0.0.1:8082']);
  
      ffmpeg.stdin.pipe(msg);
  
  });
  
  
  
  udpServer2.on("listening", function() {
  
      var address = udpServer2.address();
  
      console.log("server listening " + address.address + ":" + address.port);
  
  });
  
  udpServer2.bind(8083);

• Revision 663916cea7 : SVC improvements These changes were originally made in the Stratacaster team-re

  12 octobre 2013, par Ivan Maltz

  Changed Paths :
   Modify /libs.mk

  
   Add /test/svc_test.cc

  
   Modify /test/test.mk

  
   Modify /vp9/common/vp9_onyx.h

  
   Modify /vp9/encoder/vp9_onyx_if.c

  
   Modify /vp9/vp9_cx_iface.c

  
   Modify /vp9_spatial_scalable_encoder.c

  
   Modify /vpx/exports_enc

  
   Add /vpx/src/svc_encodeframe.c

  
   Add /vpx/svc_context.h

  
   Modify /vpx/vp8cx.h

  
   Modify /vpx/vpx_codec.mk

  
  
  SVC improvements

  These changes were originally made in the Stratacaster team-review repository

  commit e114bffcd82ad74c3696ec58e13c0ac895d6c82d
  Author : Charles 'Buck' Krasic <ckrasic@google.com>
  Date : Mon Oct 14 16:52:13 2013 -0700

  Make dummy frame handling a bit more explicit, fixing bug
  with single layer encodes.

  Squashed commit of the following :

  commit 1ebbfd976c0fadb02bf1ea562a2d0e3f0206daad
  Merge : ac468dd 54e88b7
  Author : Ivan Maltz <ivanmaltz@google.com>
  Date : Fri Oct 11 17:29:58 2013 -0700

  Move SVC code from vp9_spatial_scalable_encoder to libvpx module accessible
  from ffmpeg

  commit 54e88b78b160becc9569fc3c6cb6b0a8c95dc357
  Author : Ivan Maltz <ivanmaltz@google.com>
  Date : Tue Oct 8 09:08:40 2013 -0700

  common svc encoding code for sample app and ffmpeg

  added svc_encodeframe.c, svc_context.h, svc_test.cc

  vp9_spatial_scalable_encoder uses vpx_svc_encode

  commit 5616ec8e2e3d3e8d277333d8a9242f6c70151162
  Merge : 4528014 e29137d
  Author : Ivan Maltz <ivanmaltz@google.com>
  Date : Tue Oct 8 08:47:58 2013 -0700

  Merge branch 'master' into stratacaster

  commit 45280148450b1f3d61e390df8aadedf85cd5bce1
  Merge : bb2b675 1ab60f7
  Author : Sujeevan Rajayogam <sujee@google.com>
  Date : Fri Oct 4 10:22:31 2013 -0700

  Merge branch 'master' into stratacaster

  commit bb2b675e595dc9bfc8551e963edf56800c3aea61
  Author : Sujeevan Rajayogam <sujee@google.com>
  Date : Wed Oct 2 12:37:26 2013 -0700

  Track individual frame sizes and psnrs instead of averages.

  commit c6d303b714795c81e7ceb4173967115c9f8ff5b7
  Merge : fa87df9 3583087
  Author : Sujeevan Rajayogam <sujee@google.com>
  Date : Fri Sep 27 10:05:35 2013 -0700

  Merge branch 'master' into stratacaster

  commit fa87df94fba923d9f7aeb8ae20c6e15f777e00b5
  Merge : bf22d71 3c465af
  Author : Sujeevan Rajayogam <sujee@google.com>
  Date : Thu Sep 26 16:10:31 2013 -0700

  Merge branch 'master' into stratacaster

  commit bf22d7144895a82e0c348ac177c8a261b9e2b88e
  Author : Sujeevan Rajayogam <sujee@google.com>
  Date : Thu Sep 26 11:10:34 2013 -0700

  Parameterized quantizer, 16th scalefactors, more logging, enabled single
  layer encodes to generate baseline.

  commit ceffd7e6025b765f9886b5ea0f324248aa37e327
  Author : Sujeevan Rajayogam <sujee@google.com>
  Date : Thu Sep 19 10:04:49 2013 -0700

  - Include new mode for 3 layer I frame with 5 total layers.
  - Refactor svc api.

  Change-Id : Ie4d775e21e006fa597d884c59488dc999478e9b5

• mp3 decode error with ffmpeg in ios

  29 novembre 2016, par LL2012

  I met a very strange phenomenon in decoding mp3 to pcm data in ios pad.
  I have tested the code on windows 10, it works correctly.However, with the same mp3 file and the same code runing on ios pad , the pcm data become total white noise.

  I have compare the input compressed data(mp3) and the decoded data in memory on both system. input data is all the same(none silence frame),but the decoded data has totally different.

  so, can I say that there is a bug in ffmpeg on ios platforms for decoding audio.the version I used is ffmpeg2.6

  anyone meet the same things ?