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• c# Process Arguments and Missing Output

  8 décembre 2017, par Tawm

  I’m using an FFMPEG Process to gather some information on a file :

  private void GatherFrames()
  
  {
  
      Process process = new Process();
  
      process.StartInfo.FileName = "ffmpeg";
  
      process.StartInfo.Arguments = "-i \"" + filePath + "\"";
  
      process.StartInfo.RedirectStandardError = true;
  
      process.StartInfo.UseShellExecute = false;
  
  
  
      if (!process.Start())
  
      {
  
          Console.WriteLine("Error starting");
  
          return;
  
      }
  
      StreamReader reader = process.StandardError;
  
      string line;
  
      while ((line = reader.ReadLine()) != null)
  
      {
  
          outputRichTextBox.AppendText(line + "\n");
  
      }
  
      process.Close();
  
  }

  This seems to works fine. Now I want to get just the FrameRate, and thanks to other posts, I’ve found that ffprobe can be used to do just that :

  public void GetFrameRate()
  
  {
  
      Process process = new Process();
  
      process.StartInfo.FileName = "ffprobe";
  
      process.StartInfo.Arguments = "-v 0 -of compact=p=0 -select_streams 0 -show_entries stream = r_frame_rate \"" + filePath + "\"";
  
      Console.WriteLine(process.StartInfo.Arguments);
  
      process.StartInfo.RedirectStandardError = true;
  
      process.StartInfo.RedirectStandardOutput = true;
  
      process.StartInfo.UseShellExecute = false;
  
      process.StartInfo.CreateNoWindow = false;
  
      Console.WriteLine(process.StartInfo);
  
  
  
      if (!process.Start())
  
      {
  
          Console.WriteLine("Error starting");
  
          return;
  
      }
  
  
  
      StreamReader reader = process.StandardError;
  
      string line;
  
      while ((line = reader.ReadLine()) != null)
  
      {
  
          Console.WriteLine(line);
  
      }
  
      process.Close();
  
  }

  This does not seem to work at all. The process starts, but does not return what I expect to be returned.

  If I run the command manually, I do the following in cmd.exe :

  > e:
  
  > cd "FILE_PATH"
  
  > ffprobe -v 0 -of compact=p=0 -select_streams 0 -show_entries stream=r_frame_rate "FILE_NAME.mp4"
  
  r_frame_rate=60/1

  Note : -show_entries stream = r_frame_rate does not work, only -show_entries stream=r_frame_rate without the spaces.

  ---

  I’m not sure how to properly go about doing this with a Process.

• how to get the argument of ffmpeg process in vb.net ?

  20 octobre 2015, par TOM

  i am writing a simple program to get the all the properties of a process like ffmpeg . i got most properties of predefined functions but i want to know the argument which i gave to the ffmpeg in vb.net ?

    For Each prog As Process In Process.GetProcesses
  
          If prog.ProcessName = "ffmpeg" Then
  
              al.Add(prog.Id)
  
          End If
  
      Next
  
  
  
   For Each id In al  
  
     Dim p As Process = Process.GetProcessById(id)
  
     listBox3.Items.Add(Process.GetProcessById(id).ProcessName)
  
     ListBox3.Items.Add(p.BasePriority)
  
     ListBox3.Items.Add(p.HandleCount)
  
     ListBox3.Items.Add(p.Id)
  
     ListBox3.Items.Add(p.MainWindowTitle)
  
     ListBox3.Items.Add(p.MaxWorkingSet)
  
     ListBox3.Items.Add(p.MinWorkingSet)
  
     ListBox3.Items.Add(p.PriorityBoostEnabled)
  
     ListBox3.Items.Add(p.PriorityClass)
  
     ListBox3.Items.Add(p.PrivilegedProcessorTime)
  
     ListBox3.Items.Add(p.ProcessName)
  
     ListBox3.Items.Add(p.ProcessorAffinity)
  
     ListBox3.Items.Add(p.StartTime)
  
     ListBox3.Items.Add(p.TotalProcessorTime)
  
    ListBox3.Items.Add(p.UserProcessorTime)
  
    lastBox3.Items.Add(p.WaitForInputIdle)
  
    ListBox3.Items.Add("========================")
  
  Next id

• Révision 18091 : Lorsuq’un formulaire ajax ajoute une action en queue, elle n’est pas declenchée ...

  17 juin 2011, par cedric -

  Particulièrement critique si le site a peu de traffic. On procède donc à un appel du pipeline affichage_final, sur un texte vide, avec une globale html=false pour empecher toute tentative d’affichage, ce qui permet neanmoins de declencher des actions du type cron (...)