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• How to combine multiple ffmpeg streams into a single 4x4 collage ?

  16 mars 2013, par CoryG

  I have a server with 16 video capture card channels coming into it and want to stream them with ffmpeg, is it possible to have another stream going out that is a 4x4 collage of the 16 unique channels ?

  Edit : Adding a bounty since no working answer has been submitted yet - will reward it to the first one that can show the code to produce a 4x4 grid of 16 live channels (input device being http:// localhost:8090/x.mpg where x= a number 0-15, 352x288 video in MPEG1VIDEO format, YUV420P color at 24-30FPS) - or code that leads me to that solution - the output will be located at http:// localhost:8090/all.mpg and will be a 1408x1152 mpg live stream.

• Using FFPlay in a mac Application

  16 mars 2013, par Anand

  -I am working on a mac application that needs a video area in a part of the App.

  I see that we have a ffplay static library here - which is a UNIX executable - http://www.evermeet.cx/ffplay/

  I included that in my project - But now do i specify a NSView or something to show the Video using ffplay

• FFMPEG excute error from C# with "setup factory"setups

  15 mars 2012, par Savas Adar

  i am developing an application and i am using ffmpeg in this application for convert audio file "mp3" to "amr".

  My application running successfully when i debug it or when if i copy debug folder another computer, it is running.

  But, i am create a setup with "Setup Factory" application. When i install application which i create with setup factory, ffmpeg code block is not running, i get "OutputPackage" as null.

  here is code ;

  Converter converter = new Converter();
  
                          //varsa sil
  
                          if (File.Exists(PathTargetPre + "_orijinal.amr"))
  
                              File.Delete(PathTargetPre + "_orijinal.amr");
  
                          //dosyayı convert et ve olustur
  
                          OutputPackage oo = converter.ConvertToAMR(PathSource, PathTargetPre + "_orijinal.amr");
  
                          if (oo == null)
  
                          {
  
                              MessageBox.Show("Convert Error!");
  
                              return;
  
                          }
  
                          //dosya hazırlandı
  
                          if (oo.AudioStream == null)
  
                          {
  
                              MessageBox.Show("Convert Error 2!");
  
                              return;
  
                          }
  
  
  
                          lblGercekBoyut.Text = Convert.ToString((oo.AudioStream.Length / 1000)) + " KB";
  
  
  
                          lblSikismisBoyut.Text = Convert.ToString((oo.AudioStream.Length / 1000)) + " KB";
  
  
  
                          actualBitrate = converter.GetVideoInfo(PathTargetPre + "_orijinal.amr").BitRate;

  here is "ConvertToAMR" method ;

     public OutputPackage ConvertToAMR(string sourcePath, string destPath)
  
      {
  
          OutputPackage ou = new OutputPackage();
  
          string Params = string.Format("-i {0} -ar 8000 -ac 1 {1}", sourcePath, destPath);
  
          //-ab 320k
  
          string output = RunProcess(Params);
  
  
  
          if (File.Exists(destPath))
  
          {
  
              ou.AudioStream = LoadMemoryStreamFromFile(destPath);
  
          }
  
          return ou;
  
      }