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• How to Kill ffmpeg process in node.js

  8 février 2017, par Sanjay

  I am using node.js code that convert Axis Ipcamera live stream into mp4 using FFMPEG

   var childProcess=require('child_process');
  
   var childArguments = [];
  
  var child=[];
  
  var cmd='ffmpeg -i rtsp://172.24.22.117:554/axis-media/media.amp -vcodec libx264 -pix_fmt yuv420p -profile:v baseline -preset slower -crf 18 -vf "scale=trunc(in_w/2)*2:trunc(in_h/2)*2"'+' '+__dirname+'/uploads/ouput.mp4';
  
  
  
    child=childProcess.exec(       
  
          cmd,
  
          childArguments,
  
          {            
  
              env: process.env,
  
              silent:true
  
          },  function (err, stdout, stderr) {
  
              if (err) {
  
                  throw err;
  
              }
  
              console.log(stdout);
  
  
  
          });     
  
  
  
          //    here generate events for listen child process (works properly)
  
      // Listen for incoming(stdout) data
  
      child.stdout.on('data', function (data) {
  
          console.log("Got data from child: " + data);
  
      });
  
  
  
      // Listen for any errors:
  
      child.stderr.on('data', function (data) {
  
          console.log('There was an error: ' + data);
  
      });
  
  
  
      // Listen for exit event
  
      child.on('exit', function(code) {
  
          console.log('Child process exited with exit code ' + code);
  
          child.stdout.pause();
  
          child.kill();
  
      });

  my above code works perfectly. It gives the output as I want, but I am not able to kill(stop) the ffmpeg command. I am using the code below for stopping the process, but in background it still continues.

  child.kill("SIGTERM"); 

  I also used following commands : child.kill(’SIGUSR1’) ; child.kill("SIGHUP") ; child.kill("SIGINT") ;child.kill(’SIGUSR2’) ; for killing this process but it not works.

  Currently I forcefully kill the node application to stop ffmpeg command and generate mp4 file. I do not want this.
  But I want commands that stop ffmpeg process and generate mp4 file, without killing the node application.

• Error : Package : perl-Git-1.8.2.1-1.el5.x86_64 (epel) Requires : perl(:MODULE_COMPAT_5.8.8)

  23 décembre 2014, par P C SAS3

  error in loading github lib tool

  i have tried to load the following dependencies to load ffmpeg from source when i try to run the following command i am getting errors as below

  yum install autoconf automake gcc gcc-c++ git libtool make nasm pkgconfig zlib-devel
  
  Loaded plugins: fastestmirror
  
  Loading mirror speeds from cached hostfile
  
   * base: mirrors.viethosting.vn
  
   * epel: ftp.cuhk.edu.hk
  
   * extras: mirrors.viethosting.vn
  
   * updates: mirrors.vinahost.vn
  
  base                                                     | 3.7 kB     00:00     
  
  epel                                                     | 3.7 kB     00:00     
  
  epel/primary_db                                          | 3.7 MB     00:18     
  
  extras                                                   | 3.4 kB     00:00     
  
  updates                                                  | 3.4 kB     00:00     
  
  updates/primary_db                                       | 1.5 MB     00:16     
  
  vz-base                                                  |  951 B     00:00     
  
  vz-updates                                               |  951 B     00:00     
  
  Setting up Install Process
  
  Package autoconf-2.63-5.1.el6.noarch already installed and latest version
  
  Package automake-1.11.1-4.el6.noarch already installed and latest version
  
  Package gcc-4.4.7-11.el6.x86_64 already installed and latest version
  
  Package gcc-c++-4.4.7-11.el6.x86_64 already installed and latest version
  
  Package 1:make-3.81-20.el6.x86_64 already installed and latest version
  
  Package 1:pkgconfig-0.23-9.1.el6.x86_64 already installed and latest version
  
  Package zlib-devel-1.2.3-29.el6.x86_64 already installed and latest version
  
  Resolving Dependencies
  
  --> Running transaction check
  
  ---> Package git.x86_64 0:1.8.2.1-1.el5 will be installed
  
  --> Processing Dependency: perl-Git = 1.8.2.1-1.el5 for package: git-1.8.2.1-1.el5.x86_64
  
  --> Processing Dependency: perl(Term::ReadKey) for package: git-1.8.2.1-1.el5.x86_64
  
  --> Processing Dependency: perl(Git) for package: git-1.8.2.1-1.el5.x86_64
  
  --> Processing Dependency: perl(Error) for package: git-1.8.2.1-1.el5.x86_64
  
  --> Processing Dependency: libssl.so.6()(64bit) for package: git-1.8.2.1-1.el5.x86_64
  
  --> Processing Dependency: libexpat.so.0()(64bit) for package: git-1.8.2.1-1.el5.x86_64
  
  --> Processing Dependency: libcurl.so.3()(64bit) for package: git-1.8.2.1-1.el5.x86_64
  
  --> Processing Dependency: libcrypto.so.6()(64bit) for package: git-1.8.2.1-1.el5.x86_64
  
  ---> Package libtool.x86_64 0:2.2.6-15.5.el6 will be installed
  
  ---> Package nasm.x86_64 0:2.07-7.el6 will be installed
  
  --> Running transaction check
  
  ---> Package compat-expat1.x86_64 0:1.95.8-8.el6 will be installed
  
  ---> Package git.x86_64 0:1.8.2.1-1.el5 will be installed
  
  --> Processing Dependency: libcurl.so.3()(64bit) for package: git-1.8.2.1-1.el5.x86_64
  
  ---> Package openssl098e.x86_64 0:0.9.8e-18.el6_5.2 will be installed
  
  ---> Package perl-Error.noarch 1:0.17015-4.el6 will be installed
  
  ---> Package perl-Git.x86_64 0:1.8.2.1-1.el5 will be installed
  
  --> Processing Dependency: perl(:MODULE_COMPAT_5.8.8) for package: perl-Git-1.8.2.1-1.el5.x86_64
  
  ---> Package perl-TermReadKey.x86_64 0:2.30-13.el6 will be installed
  
  --> Finished Dependency Resolution
  
  Error: Package: perl-Git-1.8.2.1-1.el5.x86_64 (epel)
  
             Requires: perl(:MODULE_COMPAT_5.8.8)
  
  Error: Package: git-1.8.2.1-1.el5.x86_64 (epel)
  
             Requires: libcurl.so.3()(64bit)
  
   You could try using --skip-broken to work around the problem
  
   You could try running: rpm -Va --nofiles --nodigest

  now i went into some solution on net which asked to check with disablerepo to rpmforge it also throw the following error

  # yum --disablerepo=rpmforge install git
  
  Loaded plugins: fastestmirror
  
  
  
  
  
  Error getting repository data for rpmforge, repository not found

  kindly help so that i can install all the dependencies so that i may not face any problem while configuring ffmpge

• C# .net mvc Process return encoding progress (FFMpeg) to client initiated with ajax

  19 décembre 2014, par user1585895

  I am using FFMpeg to encode wav to mp3s, and on completion download the final .zip to the client.

  All works great, and I can Debug.WriteLine the progress of the encoding, but I would like to return _percentage back to the client to do some UI updates based on the value of _percentage and if all encoding is done, Im not sure how to approach this.

  My thinking is as follows :

  • ajax post to CreateAndDownloadAlbum(List trackIds, int productId)
  • loop through List and create a new Process, run
    — parse StdError to get encoding percentage in myProcess_ErrorData(object source, DataReceivedEventArgs e)
    — send _percentage value at timed intervals back to CreateAndDownloadAlbum
    — update UI based on value of _percentage, when all is complete break and call public ActionResult SendFileDownload()

  Any input would be great.

  Thanks !

  front end AJAX call to post list of file Ids to download

  var data = $('#downloadAlbum').serialize();
  
  $.ajax({
  
      url: "/Admin/CreateAndDownloadAlbum",
  
      method: "POST",
  
      data: data,
  
      dataType: 'json',
  
      success: function(result) {
  
           // wait here for _percentage
  
           // if not 100, call again to get new _percentage value
  
           // if 100, update UI, move to next file being encoded
  
           // if all encoding is complete, call SendFileDownload() in controller
  
      }
  
  });

  then the controller code

  [HttpPost]
  
      public void CreateAndDownloadAlbum(List<trackstodownload> trackIds, int productId)
  
      {
  
          _numTracksToDownload = trackIds.Count;
  
          var product = _productRepository.GetProductById(productId);
  
          var artist = _artistRepository.GetArtistById(product.ArtistId);
  
  
  
          var folderGuid = Guid.NewGuid();
  
          _zipFolder = string.Concat(artist.ArtistName.ToUpper().Replace(" ", "_"), "[", product.ProductName.ToUpper().Replace(" ", "_"), "].zip");
  
          _mp3FolderPath = Server.MapPath("/Files/" + productId + "/" + folderGuid);
  
          _zipDownloadPath = Server.MapPath("/Delivery/" + _zipFolder);
  
  
  
          if (!Directory.Exists(Server.MapPath("/Files/" + productId + "/" + folderGuid)))
  
          {
  
              Directory.CreateDirectory(Server.MapPath("/Files/" + productId + "/" + folderGuid));
  
          }
  
  
  
          foreach (var z in trackIds)
  
          {
  
              var track = _trackRepository.GetTrackById(z.TrackId);
  
              var process = new Process();
  
              var startInfo = new ProcessStartInfo
  
              {
  
                  WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden,
  
                  FileName = "F:\\Development\\ffmpeg\\ffmpeg.exe",
  
                  RedirectStandardOutput = true,
  
                  RedirectStandardError = true,
  
                  UseShellExecute = false
  
              };
  
              var startFile = Path.Combine("F:\\Development","Files", track.ProductId.ToString(), track.TrackFileName);
  
              var endFile = Path.Combine("F:\\Development", "Files", track.ProductId.ToString(), folderGuid.ToString(), track.TrackFileName.Replace(".wav", ".mp3"));
  
  
  
              startInfo.Arguments = "-i " + startFile + " -b:a 320k " + endFile + " -stats";
  
              process.StartInfo = startInfo;
  
              process.EnableRaisingEvents = true;
  
              process.Exited += myProcess_exited;
  
              process.OutputDataReceived += myProcess_OutputData;
  
              process.ErrorDataReceived += myProcess_ErrorData;
  
  
  
              try
  
              {
  
                  process.Start();
  
                  process.BeginOutputReadLine();
  
                  process.BeginErrorReadLine();
  
  
  
                  if (process.HasExited == false)
  
                  {
  
                      process.WaitForExit();
  
                  }
  
              }
  
              catch (Exception)
  
              {
  
  
  
                  throw;
  
              }
  
          }
  
  
  
          SendFileDownload();
  
  
  
      }
  
  
  
      public ActionResult SendFileDownload()
  
      {
  
          // zip and move to delivery folder
  
          using (var zip = new ZipFile())
  
          {
  
              zip.AddDirectory(_mp3FolderPath, _zipFolder);
  
              zip.Save(_zipDownloadPath);
  
          }
  
  
  
          // delete items in temp guid folder
  
          var downloadedMessageInfo = new DirectoryInfo(_mp3FolderPath);
  
          foreach (var f in downloadedMessageInfo.GetFiles())
  
          {
  
              f.Delete();
  
          }
  
  
  
          // delete temp folder
  
          Directory.Delete(_mp3FolderPath);
  
  
  
          // download file
  
          string file = _zipDownloadPath;
  
          return File(file, "application/force-download", Path.GetFileName(file));
  
  
  
      }
  
  
  
      public void myProcess_exited(Object source, EventArgs e)
  
      {
  
          Debug.WriteLine("myProcess_exited ===================================");
  
          _duration = new TimeSpan(0, 0, 0);
  
          _frameTime = new TimeSpan(0, 0, 0);
  
          _percentage = 0;
  
          _numEncodedTracks++; // using this to tell me if all tracks have been encoded
  
      }
  
  
  
      public void myProcess_OutputData(object source, DataReceivedEventArgs e)
  
      {
  
      }
  
  
  
      public void myProcess_ErrorData(object source, DataReceivedEventArgs e)
  
      {
  
          string strMessage = e.Data;
  
  
  
          if (!string.IsNullOrEmpty(strMessage) &amp;&amp; (strMessage.Contains("Duration: ") || strMessage.Contains("size=")))
  
          {
  
              if (_duration != null)
  
              {
  
                  if (strMessage.Contains("Duration: "))
  
                  {
  
                      _strDuration = strMessage.Substring(strMessage.IndexOf("Duration: ") + ("Duration: ").Length,
  
                          ("00:00:00.00").Length);
  
  
  
                      char[] d_delHrMn = new char[] { ':' };
  
                      string[] d_tempHrMn = _strDuration.Split(d_delHrMn, StringSplitOptions.RemoveEmptyEntries);
  
  
  
                      char[] d_delSec = new char[] { '.' };
  
                      string[] d_tempSec = d_tempHrMn[2].Split(d_delSec, StringSplitOptions.RemoveEmptyEntries);
  
  
  
                      var d_hour = d_tempHrMn[0] == "0" ? 0 : Convert.ToInt32(d_tempHrMn[0]);
  
                      var d_min = d_tempHrMn[1] == "0" ? 0 : Convert.ToInt32(d_tempHrMn[1]);
  
                      var d_sec = d_tempSec[0] == "0" ? 0 : Convert.ToInt32(d_tempSec[0]);
  
  
  
                      _duration = new TimeSpan(d_hour, d_min, d_sec);
  
                  }
  
              }
  
  
  
              if (strMessage.Contains("size="))
  
              {
  
                  _strFrameTime = strMessage.Substring(strMessage.IndexOf("time=") + ("time=").Length,
  
                      ("00:00:00.00").Length);
  
  
  
                  char[] f_delHrMn = new char[] { ':' };
  
                  string[] f_tempHrMn = _strFrameTime.Split(f_delHrMn, StringSplitOptions.RemoveEmptyEntries);
  
  
  
                  char[] f_delSec = new char[] { '.' };
  
                  string[] f_tempSec = f_tempHrMn[2].Split(f_delSec, StringSplitOptions.RemoveEmptyEntries);
  
  
  
                  var f_hour = f_tempHrMn[0] == "0" ? 0 : Convert.ToInt32(f_tempHrMn[0]);
  
                  var f_min = f_tempHrMn[1] == "0" ? 0 : Convert.ToInt32(f_tempHrMn[1]);
  
                  var f_sec = f_tempSec[0] == "0" ? 0 : Convert.ToInt32(f_tempSec[0]);
  
  
  
                  _frameTime = new TimeSpan(f_hour, f_min, f_sec);
  
  
  
              }
  
  
  
              if (_strDuration != "00:00:00.00" &amp;&amp; _strFrameTime != "00:00:00.00" &amp;&amp; _percentage &lt; 100)
  
              {
  
                  _percentage = _frameTime.TotalMilliseconds / _duration.TotalMilliseconds * 100;
  
                  Debug.WriteLine(_percentage + " || " + _frameTime + " " + _duration);
  
              }
  
          }
  
      }
  
  </trackstodownload>