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• ffmpeg from a C# app using Process class - user prompt not shown in standardError

  21 avril 2016, par DarwinIcesurfer

  I am writing an app to run ffmpeg using c#. My program redirects the standardError output to a stream so it can be parsed for progress information.

  During testing I have found a problem :

  If the output is shown in a command window rather than being redirected ffmpeg will display it’s normal headers followed by "file c :\temp\testfile.mpg already exists. overwrite [y]". If I click on the command window and press y the program continues to encode the file.

  If the StandardError is redirected to my handler and then printed to the console, I see the same header information that was displayed in the command window now printed to the console. except for the file...already exists prompt. If I click in the command window and press y the program continues to process the file.

  Is there a stream other than standardOutput or standardError that is used when the operator is prompted for information, or am I missing something else ?

  public void EncodeVideoWithProgress(string filename, string arguments, BackgroundWorker worker, DoWorkEventArgs e)
  
      {
  
  
  
          Process proc = new Process();
  
  
  
          proc.StartInfo.FileName = "ffmpeg";
  
          proc.StartInfo.Arguments = "-i " + " \"" + filename + "\" " + arguments;
  
  
  
          proc.StartInfo.UseShellExecute = false;
  
          proc.EnableRaisingEvents = true;
  
  
  
          proc.StartInfo.RedirectStandardError = true;
  
          proc.StartInfo.RedirectStandardOutput = false;
  
          proc.StartInfo.CreateNoWindow = false; //set to true for testing
  
  
  
          proc.ErrorDataReceived += new DataReceivedEventHandler(NetErrorDataHandler);
  
  
  
          proc.Start();
  
          proc.BeginErrorReadLine();
  
  
  
  
  
          StreamReader reader = proc.StandardOutput;
  
           string line;
  
           while ((line = reader.ReadLine()) != null)
  
          { Console.WriteLine(line); }
  
       proc.WaitForExit();
  
  }
  
  
  
  private static void NetErrorDataHandler(object sendingProcess,
  
                 DataReceivedEventArgs errLine)
  
      {
  
          if (!String.IsNullOrEmpty(errLine.Data))
  
          {
  
              Console.WriteLine(errLine.Data);
  
          }
  
      }

• How a live event video is ingested to a streaming platform for broadcasting live ?

  12 mai 2020, par Suman Mondal

  Please help me in understanding how live media is sent from the encoder (media source) in real time to the streaming platform for broadcasting live to multiple viewers ?

  


• Anomalie #4167 : Script JVS affiché lors de la redirection après un login réussi en mode parano

  15 août 2018, par b b

  Après vérification, je ne reproduis pas sur le trunk puisque le formulaire de login n’est pas en ajax par défaut...

  Le problème ne se pose donc que si les squelettes ont été personnalisés pour ajaxer le formulaire de login.