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• C# redirect ffmpeg output to textbox in realtime

  21 mars 2018, par adrifcastr

  So I’ve been reading a lot through stackoverflow, and I found a lot of questions trying to deal with a similar problem as mine, but none of the solutions worked for me. So here is what I have :

  I have a WPF GUI application which launches ffmpeg by the following code :

          private void convertbutton_Click(object sender, RoutedEventArgs e)
  
      {
  
          string resdir = AppDomain.CurrentDomain.BaseDirectory + "\\res";
  
          Extract("ADC", AppDomain.CurrentDomain.BaseDirectory + "\\res", "res", "ffmpeg.exe");
  
  
  
          string ffdir = AppDomain.CurrentDomain.BaseDirectory + "\\res\\ffmpeg.exe";
  
          string arg = @"-progress progresslog.txt -y -activation_bytes ";
  
          string arg1 = @" -i ";
  
          string arg2 = @" -ab 80k -vn ";
  
          string abytes = bytebox.Text;
  
          string arguments = arg + abytes + arg1 + openFileDialog1.FileName + arg2 + saveFileDialog1.FileName;
  
  
  
          Process ffm = new Process();
  
          ffm.StartInfo.FileName = ffdir;
  
          ffm.StartInfo.Arguments = arguments;
  
          ffm.StartInfo.CreateNoWindow = true;
  
          ffm.StartInfo.RedirectStandardOutput = true;
  
          ffm.StartInfo.RedirectStandardError = true;
  
          ffm.StartInfo.UseShellExecute = false;
  
          ffm.StartInfo.WorkingDirectory = Directory.GetCurrentDirectory();
  
          ffm.Start();
  
          ffm.WaitForExit();
  
  
  
          ffm.Close();
  
  
  
          MessageBox.Show("Conversion Complete!");
  
  
  
          File.Delete("progresslog.txt");
  
          Directory.Delete(resdir, true);
  
      }

  So on this application I do also have other processes, which display their output to the textbox after finishing what they are doing, so but since ffmpeg outputs it’s conversion progress in the cmd output, I need to get exactly that being displayed in the textbox in realtime.

  And I am pretty sure that ffmpeg outputs into stderr same w/ ffprobe.

  I’d appreciate any help, since days of googleing didn’t help me with anything so far.
  Thanks in advance.

• Is it possible to use MediaTransportControls with FFmpegInterop in UWP ?

  1er janvier 2020, par Agredo

  Is it possible to use the MediaTransportControls ? Currently getting the error "Could not decode video" using any MediaTransportControl.

  XAML

  <mediaplayerelement source="{Binding VideoSource}" autoplay="True" aretransportcontrolsenabled="True"></mediaplayerelement>

  ViewModel

          FileOpenPicker picker = new FileOpenPicker();
  
          picker.FileTypeFilter.Add("*");
  
  
  
          var file = await picker.PickSingleFileAsync();
  
  
  
          var stream = await file.OpenReadAsync();
  
  
  
          var mediaStreamsource = FFmpegInteropMSS.CreateFFmpegInteropMSSFromStream(stream, false, false).GetMediaStreamSource();
  
  
  
          VideoSource = MediaSource.CreateFromMediaStreamSource(mediaStreamsource);

  Thanks
  Agredo

• error converting .caf to .mp3 in mvc 4

  17 avril 2014, par Jennifer

  I used to convert caf to mp3 using Wscript.shell and ffmpeg.exe when i was using asp.net
  but now i'm using a web api restful method in mvc 4, so i don't have a .aspx page
  i'm getting the following error :

     Description:System.Web.HttpException (0x80004005): The component 'Wscript.Shell' cannot be created.  Apartment threaded components can only be created on pages with an <%@ Page aspcompat=true %> page directive.

  but i don't have an aspx page to add this tag...

  the code i was using in aspx is :

     Dim wshShell As Object
  
     wshShell = Server.CreateObject("Wscript.Shell")
  
     cmd = "cmd.exe /k """"" & szCAF_PATH & """ -i """ & szPhysicalPath & """ " & Arguments & " """ & szEncodedPath & """"""
  
     wshShell.Run(cmd)
  
     Dim strCommand As String = "taskkill /F /IM cmd.exe"
  
     wshShell.Run(strCommand, 0, True)
  
     szDownloadLink = szDownloadLink.Replace(".caf", ".mp3")

  and the code in mvc4 is :

     wshShell = HttpContext.Current.Server.CreateObject("Wscript.Shell")
  
     cmd = "cmd.exe /k """"" & File.CAF_PATH & """ -i """ & File.PhysicalPath & """ " & File.Arguments & " """ & File.EncodedPath & """"""
  
     wshShell.Run(File.cmd)
  
     strCommand = "taskkill /F /IM cmd.exe"
  
     wshShell.Run(strCommand, 0, True)
  
     File.DownloadLink = File.DownloadLink.Replace(".caf", ".mp3")

  does anyone know how can i fix this ?