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• How to run ffplay as a window-less process ?

  22 août 2019, par S B

  I am running ffplay as a background process which supplies image data to my main UI process. I have set "SDL_VIDEODRIVER = dummy" to suppress the ffplay video being shown in a SDL window.

  The issue is that the ffplay process still appears as an application window (dock, CMD+TAB entries etc.) even if the video output window is not displayed. How can I avoid that ?

• Number ffmpeg process running

  29 octobre 2022, par GoAmGo

  I'm making a application to create hls channels, my problem is what no can running more than six ffmpeg process at time and i dont know becouse it.

  


  You can see in this video https://www.youtube.com/watch?v=G24KuYMLjsM

  


  The server is apache with php-fpm fcgid and the cuestion is what i can runnig more process whitout problem but i don`t know becouse it limited ffmpeg to six process.

  


  I'm probe all but i think can be a limit in the ffmpeg compitated version ?

  


  When I exec the seven ffmpeg process, ffmpeg say : Conversion Falied !

  


  But I can run others process more with not be ffmpeg , is not a server limit.

  


• 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.