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• LiveStream My Desktop RTSP with FFMpegConverter.ConvertLiveMedia

  27 octobre 2023, par Luiz

  I'm putting together an application to stream from my desktop to an RTSP server. I used FFMPEG passing the following arguments :

  


  ffmpeg -f gdigrab -rtbufsize 100M -framerate 30 -probesize 10M -draw_mouse 1 -i desktop -c:v libx264 -r 30 -preset ultrafast -tune zerolatency -crf 25 -f rtsp -rtsp_transport tcp rtsp://1.1.1.1:8554/player/1ef8d9a5-b0b3-4dab-93a0-ac2bdef2f8aa/index.m3u8


  


  it worked perfectly, but I need to use FFMPEG within my application and not externally (via process). I looked and found a wrapper for .Net that apparently works very well, but I couldn't make it work with the arguments I used directly in FFMPEG.
The code I am using is the following :

  


   Dim outPath As String = "rtsp://1.1.1.1:8554/player/1ef8d9a5-b0b3-4dab-93a0-ac2bdef2f8aa"
 Dim inPath = "desktop"
 Dim videoConv = New FFMpegConverter()
 Dim ffMpegTask = videoConv.ConvertLiveMedia(inPath, Nothing, outPath, Format.flv, New ConvertSettings() With {
 .VideoFrameSize = "320x200",
 .CustomOutputArgs = "-f gdigrab -rtbufsize 100M -framerate 30 -probesize 10M -draw_mouse 1 -i desktop -c:v libx264 -r 30 -preset ultrafast -tune zerolatency -crf 25 -f rtsp -rtsp_transport tcp rtsp://1.1.1.1:8554/player/1ef8d9a5-b0b3-4dab-93a0-ac2bdef2f8aa/index.m3u8",
 .VideoFrameRate = 30,
 .MaxDuration = 5
 })
 ffMpegTask.Start()


  


  However, it doesn't work, it says that in Input, it must be a stream and that Desktop would not be valid.
Would anyone know how I can convert my argument line so that I can use it in the Video Converter for .NET FFMpeg C# wrapper ????

  


• How can I capture and record only specific part of the desktop using ffmpeg ?

  23 juillet 2018, par Benzi Avrumi

  This is how I’m using now to record the desktop.

  Using ffmpeg.exe : ffmpeg -f gdigrab -framerate 24 -i desktop -preset ultrafast -pix_fmt yuv420p out.mp4

  Or using csharp :

   using System;  
  
      using System.Collections.Generic;  
  
      using System.Linq;  
  
      using System.Text;  
  
      using System.Threading.Tasks;  
  
      using System.IO;  
  
      using System.Diagnostics;  
  
  
  
      namespace Ffmpeg_App  
  
      {  
  
          class Ffmpeg  
  
          {  
  
              Process process;  
  
  
  
              public void Start(string FileName, int Framerate)  
  
              {  
  
                  process = new System.Diagnostics.Process();  
  
                  process.StartInfo.FileName = @"D:\ffmpegx86\ffmpeg.exe"; // Change the directory where ffmpeg.exe is.  
  
                  process.EnableRaisingEvents = false;  
  
                  process.StartInfo.WorkingDirectory = @"D:\ffmpegx86"; // The output directory  
  
                  process.StartInfo.Arguments = @"-f gdigrab -framerate " + Framerate + " -i desktop -preset ultrafast -                                                                     pix_fmt yuv420p " + FileName;  
  
                  process.Start();  
  
                  process.StartInfo.UseShellExecute = false;  
  
                  process.StartInfo.CreateNoWindow = false;  
  
                  Close();  
  
              }  
  
  
  
              public void Close()  
  
              {  
  
                  process.Close();  
  
              }  
  
          }  
  
      }  

  And using it like this for example :

  Ffmpeg fpeg = new Ffmpeg(); 
  
  
  
  
  
      private void Start_Click(object sender, EventArgs e)  
  
              {  
  
                  fpeg.Start("test.mp4", 24);  
  
              }  
  
  
  
  
  
      private void Stop_Click(object sender, EventArgs e)  
  
              {  
  
                  fpeg.Close();  
  
              } 

  This will record the entire desktop window to a video file.
  But how can I record a specific rectangle area in the desktop ? For example to record only the right bottom corner rectangle size 10x10.

  So when I will play the video file I will see full screen video but only of the right bottom corner of the desktop.

• Directly download the output file to client desktop

  11 novembre 2020, par jsdbt

  I am processing a video file using ffmpeg, in AWS lambda. My file size is 1gb. I don't want to store the processed file in /tmp folder (or efs).

  


  Is there a way I can directly download the output file to the user's desktop, from AWS lambda ?