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• Encoding Android Camera Frames h263/h264 [on hold]

  29 décembre 2015, par Another Guy

  I want to implement a Video Chatting app on Android . I created a SurfaceView , get Camera preview and captured the frame as a byte[ ] using Camera.PreviewCallback.onPreviewFrame( ) method . Now I want to encode that byte[ ] to a h263 frame , pass over the network . Also get similar type of frame over network , decode it to a byte[ ] ( or a displayable format ) , and show it in a View . I want to do it at least 15 FPS rate . I am asking help for the encoding/decoding part .

  For that purpose , which library would be suitable for me ? From where I should start ? Is my starting point wrong ? Is there any support on SDK or would I have to use NDK ? I have heard about FFMpeg/x264 library , but I could not figure out how I can use them in my purpose . It’s highly appreciated If you name any library , any reference , learning path , link or code snippet . Can you help me saying any workflow I should follow ? What if I want to use h264 encoding ? I just want to get it done , GPL/LGPL license of library would not matter a lot .

  I am a beginner in Android development . Any kind of assistance would be highly appreciated . Thanks in advance .

• 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;
  
      }

• 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