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• ffmpeg disconnects from the HTTP server

  29 janvier 2017, par Frédéric Lopes

  I am facing to a problem that I cannot solve for days now and cannot find any answer over internet..

  I am currently working on a live streaming & IoT project through internet in order to access to indoor items and see through a webcam. I am using Node.js for the server side and using a mpeg1video decoder working with WebSocket (https://github.com/phoboslab/jsmpeg).

  All the server side (HTTP + WebSocket server) and client side are working properly (I see the clients connecting and waiting for sockets) but when I try to stream a video (or a camera) ffmpeg is not keeping the connection with my HTTP server, the connection is established but it is disconnected 1 second after being connected... Here is the terminal outputs gathered :

  if( process.argv.length < 4 ) {
  
      console.log(
  
          'Usage: \n' +
  
          'node stream-server.js [ ]'
  
      );
  
      process.exit();
  
  }
  
  
  
  var STREAM_PORT = process.argv[2] || 8080,
  
          WEBSOCKET_PORT = process.argv[3] || 8081,
  
          STREAM_MAGIC_BYTES = 'jsmp'; // Must be 4 bytes
  
  
  
  var width = 320,
  
          height = 240;
  
  
  
  // Websocket Server
  
  var socketServer = new (require('ws').Server)({port: WEBSOCKET_PORT});
  
  socketServer.on('connection', function(socket) {
  
      // Send magic bytes and video size to the newly connected socket
  
      // struct { char magic[4]; unsigned short width, height;}
  
      var streamHeader = new Buffer(8);
  
      streamHeader.write(STREAM_MAGIC_BYTES);
  
      streamHeader.writeUInt16BE(width, 4);
  
      streamHeader.writeUInt16BE(height, 6);
  
      socket.send(streamHeader, {binary:true});
  
  
  
      console.log('New WebSocket Connection ('+socketServer.clients.length+' total)');
  
  
  
      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 ) {
  
          if (this.clients[i].readyState == 1) {
  
              this.clients[i].send(data, opts);
  
          }
  
          else {
  
              console.log( 'Error: Client ('+i+') not connected.' );
  
          }
  
      }
  
  };
  
  
  
  // HTTP Server to accept incomming MPEG Stream
  
  var streamConnected = false;
  
  var streamServer = require('http').createServer(function(request, response) {
  
      response.connection.setTimeout(0);
  
      if(streamConnected) {
  
          response.end();
  
          return;
  
      }
  
      streamConnected = true;
  
  
  
      var params = request.url.substr(1).split('/');
  
  
  
      width = (params[0] || 320)|0;
  
      height = (params[1] || 240)|0;
  
  
  
      console.log(
  
          'Stream Connected: ' + request.socket.remoteAddress +
  
          ':' + request.socket.remotePort + ' size: ' + width + 'x' + height
  
      );
  
  
  
      request.on('data', function(data){
  
          socketServer.broadcast(data, {binary:true});
  
      });
  
  
  
      request.on('close', function(data){
  
          console.log("Stream disconnected");
  
          streamConnected = false;
  
      });
  
  
  
  }).listen(STREAM_PORT);
  
  
  
  console.log('Listening for MPEG Stream on http://127.0.0.1:'+STREAM_PORT+'/<width>/<height>');
  
  console.log('Awaiting WebSocket connections on ws://127.0.0.1:'+WEBSOCKET_PORT+'/');
  
  </height></width>

  Once the server running, I am using the command line to send my video to the http server :

  ffmpeg -f mp4 -i in.mp4 -f mpeg1video -r 30 http://127.0.0.1:8080

  Unfortunatelly, the connection is established for 1 seconde maximum and it disconnects right after.. I tried everything to keep it even setting a timeout to the request of ffmpeg.

  Thank you for those who are going to help me with this issue !

  UPDATE : Outputs gathered on the terminal

  1st is the output generated by ffmpeg :

  MacBook-Pro-de-Frederic: ffmpeg -f mp4 -i in.mp4 -f mpeg1video -r 30 http://127.0.0.1:8080
  
  ffmpeg version 3.2.2 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
  
    configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --enable-libvidstab --enable-libx265 --disable-doc --arch=x86_64 --enable-runtime-cpudetect
  
    libavutil      55. 34.100 / 55. 34.100
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.100 / 57. 56.100
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'in.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.25.101
  
    Duration: 00:00:13.29, start: 0.000000, bitrate: 490 kb/s
  
      Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 300x198 [SAR 1:1 DAR 50:33], 489 kb/s, 22.73 fps, 22.73 tbr, 16k tbn, 45.45 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  Output #0, mpeg1video, to 'http://127.0.0.1:8080':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.56.100
  
      Stream #0:0(und): Video: mpeg1video, yuv420p, 300x198 [SAR 1:1 DAR 50:33], q=2-31, 200 kb/s, 30 fps, 30 tbn, 30 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
        encoder         : Lavc57.64.101 mpeg1video
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> mpeg1video (native))
  
  Press [q] to stop, [?] for help
  
  frame=  398 fps=0.0 q=7.2 Lsize=     540kB time=00:00:13.23 bitrate= 334.2kbits/s dup=96 drop=0 speed=49.7x    
  
  video:540kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%

  2nd output, the prints of the Node.js script :

  MacBook-Pro-de-Frederic: node stream-server.js 8080 8081
  
  Listening for MPEG Stream on http://127.0.0.1:8080/<width>/<height>
  
  Awaiting WebSocket connections on ws://127.0.0.1:8081/
  
  New WebSocket Connection (1 total)
  
  Stream Connected: ::ffff:127.0.0.1:52444 size: 320x240
  
  Stream disconnected
  
  </height></width>

  As you can see, my server receives the stream from ffmpeg but is disconnected right after.. Thus, I cannot do any stream and I don’t understand why because there is not any error that appears..

  UPDATE 2 : TESTED ON RASPBERRYPI MODEL B+

  I tested all the code hereabove on raspberry pi (after 5h installing ffmpeg..) and launch the encoding with the terminal command hereafter and it works perfectly ! I am still wondering why it is not working properly on Mac ? Maybe a problem of compatibility between OSX and FFMPEG ? If someone has an answer or an idea of the solution to the problem on Macintosh, let me know !

  raspivid -t 0 -w 320 -h 240 -fps 20 -vf -o - | ffmpeg -y -i pipe:0 -s 320x240 -f video4linux2 -f mpeg1video -b 400k -r 30 http://127.0.0.1:8080

  Configuration used : Macbook Pro updated running Node.js 6.9.2 & ffmpeg 3.2.2.

  Frederic

• OSError : [Errno 2] No such file or directory - code worked on new computer doesnt work on old one

  9 mars 2016, par Natasha Hoherchak

  I wrote a script to extract frames from a database I have stored on my computer desktop. I wrote the code on a different computer (new macbook pro 2016) as my computer’s harddrive died. I was finally able to restore my computer (and therefore returned the new computer I wrote the code on).

  I am trying to run the same script, completely unchanged and I keep getting this error : (The line btwn ** ATTENTION** is the printed command line.)

  --------------------------**********ATTENTION**********-------------------------
  
  ffmpeg -i /Desktop/UCF101/v_BaseballPitch_g01_c01.avi -ss 00:00:00.0 -vframes 1 BPout0.png
  
  --------------------------**********ATTENTION**********-------------------------
  
  Traceback (most recent call last):
  
    File "./Desktop/processing.py", line 50, in <module>
  
      processvideo('/Desktop/UCF101/v_BaseballPitch_g01_c01.avi')
  
    File "./Desktop/processing.py", line 47, in processvideo
  
      sp.check_output(args) #was cmdline
  
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 568, in check_output
  
      process = Popen(stdout=PIPE, *popenargs, **kwargs)
  
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 711, in __init__
  
      errread, errwrite)
  
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1308, in _execute_child
  
      raise child_exception
  
  OSError: [Errno 2] No such file or directory
  
  </module>

  Everything is in the same place as it was on the new computer where it was able to run successfully. Does anyone have any idea what it could be ? Could my version of python have anything to do with it ? Could it be a larger issue on my computer ? Any tips for debugging whats caused this error ? I’ve already printed the command (matches perfectly), used shlex.split("mycommandline"), checked my current directory in the script...

• ffmpeg screen recording with camera overlay on OSX

  8 novembre 2015, par lockdoc

  I would like to use ffmpeg to record my desktop as well as my camera as an overlay on top of the desktop.

  So basically I will have two input sources that need to be recorded

  $ ffmpeg -f avfoundation -list_devices true -i ''
  
  [AVFoundation input device @ 0x7fded1c223e0] AVFoundation video devices:
  
  [AVFoundation input device @ 0x7fded1c223e0] [0] FaceTime HD Camera
  
  [AVFoundation input device @ 0x7fded1c223e0] [1] Capture screen 0
  
  [AVFoundation input device @ 0x7fded1c223e0] AVFoundation audio devices:
  
  [AVFoundation input device @ 0x7fded1c223e0] [0] Built-in Microphone

  From the above, I need [0] FaceTime HD Camera as an overlay and [1] Capture screen 0 as the main video.

  Is this even possible ?

  UPDATE (2015-10-06) :

  I found the following command from ffscreencast :

  ffmpeg \
  
  -f avfoundation -i "1" \
  
  -f avfoundation -r 30 -video_size 640x480 -i "0" \
  
  -c:v libx264 -crf 0 -preset ultrafast \
  
  -filter_complex 'overlay=main_w-overlay_w-10:main_h-overlay_h-10' "out.mkv"

  Unfortunately the output has a pretty slow framerate (i7 Macbook Pro 2014)

  Output #0, matroska, to 'out.mkv':
  
    Metadata:
  
  encoder         : Lavf56.40.101
  
  Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv420p, 3840x2400, q=-1--1, 1000k fps, 1k tbn, 1000k tbc (default)
  
  Metadata:
  
    encoder         : Lavc56.60.100 libx264
  
  Stream mapping:
  
    Stream #0:0 (rawvideo) -> overlay:main
  
    Stream #1:0 (rawvideo) -> overlay:overlay
  
    overlay -> Stream #0:0 (libx264)
  
  
  
  frame=  756 fps=9.1 q=-1.0 Lsize=  193660kB time=00:01:21.86 bitrate=19378.5kbits/s
  
  Press [q] to stop, [?] for help

  Anyone an idea of how to get a higher framerate ?
  My camera is only able to record at 30 frames per second, but the output seems to only have around 9 frames. Why the difference ?