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• How to send written frames in real time/synchronized with FFmpeg and UDP ?

  20 juin 2018, par potu1304

  I wanted to nearly live stream my Unit game with FFmpeg to a simple client. I have one Unity game in which each frame is saved as an jpg image. These images are wrapped in ffmpeg and send over udp to a simple c# client where I use ffplay to play the stream. The problem is, that FFmpeg is wrapping the images way faster than the unity app can write them. So ffmpeg quits but Unity is still writing frames. Is there a way to set ffmpeg in a loop to wait for the next image or can I somehow make a for loop without call every time ffmpeg ?

  Here is my function from my capturing script in Unity :

  Process process;
  
      //BinaryWriter _stdin;
  
      public void encodeFrame()
  
      {
  
  
  
  
  
          ProcessStartInfo startInfo = new ProcessStartInfo();
  
  
  
          var basePath = Application.streamingAssetsPath + "/FFmpegOut/Windows/ffmpeg.exe";
  
  
  
  
  
          info.Arguments = "-re -i screen_%d.jpg -vcodec libx264 -r 24 -f mpegts udp://127.0.0.1:1100";
  
          info.RedirectStandardOutput = true;
  
          info.RedirectStandardInput = true;
  
          info.RedirectStandardError = true;
  
          info.CreateNoWindow = true;
  
          info.UseShellExecute = false;
  
          info.RedirectStandardError = true;
  
          UnityEngine.Debug.Log(string.Format(
  
              "Executing \"{0}\" with arguments \"{1}\".\r\n",
  
              info.FileName,
  
              info.Arguments));
  
          process = Process.Start(info);
  
          //_stdin = new BinaryWriter(process.StandardInput.BaseStream);
  
          process.WaitForExit();
  
          var outputReader = process.StandardError;
  
          string Error = outputReader.ReadToEnd();
  
          UnityEngine.Debug.Log(Error);
  
  
  
  }

  And here the function from my cs file from my simple windowsform application :

  private void xxxFFplay()
  
  {
  
      text = "start";
  
      byte[] send_buffer = Encoding.ASCII.GetBytes(text);
  
      sock.SendTo(send_buffer, endPoint);
  
      ffplay.StartInfo.FileName = "ffplay.exe";
  
      ffplay.StartInfo.Arguments = "udp://127.0.0.1:1100";
  
      ffplay.StartInfo.CreateNoWindow = true;
  
      ffplay.StartInfo.RedirectStandardOutput = true;
  
      ffplay.StartInfo.UseShellExecute = false;
  
  
  
      ffplay.EnableRaisingEvents = true;
  
      ffplay.OutputDataReceived += (o, e) => Debug.WriteLine(e.Data ?? "NULL", "ffplay");
  
      ffplay.ErrorDataReceived += (o, e) => Debug.WriteLine(e.Data ?? "NULL", "ffplay");
  
      ffplay.Exited += (o, e) => Debug.WriteLine("Exited", "ffplay");
  
      ffplay.Start();
  
  
  
      Thread.Sleep(500); // you need to wait/check the process started, then...
  
  
  
      // child, new parent
  
      // make 'this' the parent of ffmpeg (presuming you are in scope of a Form or Control)
  
      //SetParent(ffplay.MainWindowHandle, this.panel1.Handle);
  
  
  
      // window, x, y, width, height, repaint
  
      // move the ffplayer window to the top-left corner and set the size to 320x280
  
      //MoveWindow(ffplay.MainWindowHandle, -5, -300, 320, 280, true);
  
  
  
  }

  Does have somebody some ideas ? I am really stuck at this to create a somehow "live" stream.

  Best regards

• How to access windows enviroment variables on MSYS ?

  4 novembre 2024, par Mostafa Sataki

  I want to build ffmpeg by vs2015 from msys2.

  



  In the first add vs2015\vc\bin\amd64 in to path enviroment in windows.

  



  Run "vs2015 x64 command prompt" as administrator then run vcvarsall.bat amd64.

  



  In the final go to "msys" path and then run "msys2_shell.cmd".

  



  I use "which cl" command for localize cl.exe.

  



  Output :

  



  


  which : no cl in 
 (/usr/local/bin :/usr/bin :/bin :/opt/bin :/c/Windows/System32 :/c/Windows :/c/Windows/System32/Wbem :/c/Windows/System32/WindowsPowerShell/v1.0/)

  


  



  How to access to windows enviroments in the msys ?

  


• How to access windows enviroment variables on MSYS ?

  15 octobre 2016, par Mostafa Sataki

  I want to build ffmpeg by vs2015 from msys2.

  In the first add vs2015\vc\bin\amd64 in to path enviroment in windows.

  Run "vs2015 x64 command prompt" as administrator then run vcvarsall.bat amd64.

  In the final go to "msys" path and then run "msys2_shell.cmd".

  I use "which cl" command for localize cl.exe.

  Output :

  which : no cl in
  (/usr/local/bin :/usr/bin :/bin :/opt/bin :/c/Windows/System32 :/c/Windows :/c/Windows/System32/Wbem :/c/Windows/System32/WindowsPowerShell/v1.0/)

  How to access to windows enviroments in the msys ?