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• NodeJS - How to pipe same video stream to multiple clients ?

  30 août 2013, par SergioBR

  We have a situation trying to serve a video stream.

  Since HTML5 video tag does not support udp to multicast, we are trying to re-use an already converted ffmpeg stream and send it to more than one response. But that does not work.

  The first response gets the stream alright, but the second one does not.
  It seems that the stream cannot be piped out to another response, neither can it be cloned.

  Has anyone done that before ? Any ideas ?

  Thanks in advance !

  Here's the code :

  var request = require('request');
  
  var http = require('http');
  
  var child_process = require("child_process");
  
  var n = 1;
  
  var stdouts = {};
  
  
  
  http.createServer(function (req, resp) {
  
  
  
  console.log("***** url ["+req.url+"], call "+n);
  
  
  
  if (req.url != "/favicon.ico" && req.url != "/")
  
  {
  
  var params = req.url.substring(1).split("/");
  
  
  
  switch (params[0])
  
  {
  
    case "VIEW":
  
      if (params[1] == "C2FLOOR1" || params[1] == "C2FLOOR2" || params[1] == "C2PORFUN" || params[1] == "C2TESTCAM")
  
        var camera = "rtsp://192.168.16.19:554/Inter/Cameras/Stream?Camera="+params[1];
  
      else
  
        var camera = "http://192.168.16.19:8609/Inter/Cameras/GetStream?Camera="+params[1];
  
  
  
      // Write header
  
      resp.writeHead(200, {'Content-Type': 'video/ogg', 'Connection': 'keep-alive'});
  
  
  
      if (stdouts.hasOwnProperty(params[1]))
  
      {
  
        console.log("Getting stream already created for camera "+params[1]);
  
  
  
        var newStdout = Object.create(stdouts[params[1]]);
  
  
  
        newStdout.pipe(resp);
  
      }
  
      else
  
      {
  
          // Start ffmpeg
  
          var ffmpeg = child_process.spawn("ffmpeg",[
  
          "-i",camera,
  
          "-vcodec","libtheora",
  
          "-qscale:v","7",        // video quality
  
          "-f","ogg",             // File format
  
          "-g","1",               // GOP (Group Of Pictures) size
  
          "-"                     // Output to STDOUT
  
          ]);
  
  
  
          stdouts[params[1]] = ffmpeg.stdout;
  
  
  
          // Pipe the video output to the client response
  
          ffmpeg.stdout.pipe(resp);
  
  
  
      console.log("Initializing camera at "+camera);
  
      }
  
  
  
      // Kill the subprocesses when client disconnects
  
  /*
  
      resp.on("close",function(){
  
        ffmpegs[params[1]].kill();
  
        console.log("FIM!");
  
      });
  
  */
  
      break;
  
  }
  
  }
  
  else
  
  {
  
  resp.writeHeader(200, {"Content-Type": "text/html"});
  
  resp.write("WRONG CALL");
  
  resp.end();
  
  }
  
  n++;
  
  
  
  }).listen(8088);
  
  
  
  console.log('Server running at port 8088');

• Raspberry Pi ffmpeg live camera stream over 4g

  31 juillet 2014, par rickster

  I’m planning on connecting a camera to a Raspberry Pi and streaming video over 4G internet to control a quad copter. I will be using ffmpeg to stream the video, so far it looks like you need to use ffserver to do this. The problem is most 4G providers (I use AT&T) block all ports from hosting. Would something like FreedomPop (http://www.freedompop.com) work ? Can I stream with ffmpeg as the client ? What kind of latency can I expect ?

• bambuser ffmpeg on Android

  31 mai 2013, par Andy Developer

  Basically, I need to combine(append) audio files in android. This is required to perform pause / resume function for a voice recorder.

  I have successfully compiled bambuser ffmpeg on Android with the following.

  1. Oracle Virtual Box
  
  2. Ubuntu 12.04 x86
  
  3. android-ndk r8
  
  4. Archive for client versions 1.3.7 to 1.6.6

  (from bambuser http://bambuser.com/opensource)

  I have changed the package name in build.sh to suit my package name.
  After building, I have got the ffmpeg from build folder with the following structure

  ffmpeg

  -armeabi
  
  -armeabi-v7a

  I have copied the ffmpeg folder into my project/jni folder in my windows machine.

  Created a native.c file to include the necessary libs.
  Made ndk-build. Got the .so file.
  When I try to do this in android activity,

              try {
  
          System.loadLibrary("FFmpegTest");   
  
      } catch (Exception e) {
  
          // TODO: handle exception
  
          e.printStackTrace();
  
      }
  
            File dir = new File("/mnt/sdcard");
  
     Process p=Runtime.getRuntime().exec("ffmpeg -i test.wav test1.wav",null,dir);
  
  try {
  
       p.waitFor();
  
  }  catch (InterruptedException e) {
  
        e.printStackTrace();
  
  }

  I get the following error.
  

  05-31 11:57:53.532: D/dalvikvm(278): Trying to load lib /data/data/com.example.ffmpegtest/lib/libFFmpegTest.so 0x43e37a88
  
  
  
  05-31 11:57:53.532: D/dalvikvm(278): Added shared lib /data/data/com.example.ffmpegtest/lib/libFFmpegTest.so 0x43e37a88
  
  
  
  05-31 11:57:53.532: D/dalvikvm(278): No JNI_OnLoad found in /data/data/com.example.ffmpegtest/lib/libFFmpegTest.so 0x43e37a88, skipping init
  
  
  
  05-31 11:57:53.562: W/System.err(278): java.io.IOException: Error running exec(). Command: [ffmpeg, -i, test.wav test1.wav] Working Directory: /mnt/sdcard Environment: null

  Can anyone guide me the procedure ?