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• Resize wma audio files using ffmpeg

  24 juin 2016, par Jinto John

  While I am trying to convert wav file to wma file ,File size is becomes double from original source file, Is there any way to reduce file size of target file.
  and my code is. I use FFmpeg.exe-Its a Executable file and I am saved FFmpeg.exe in my bin folder.

  public void ConvertToWAV()
  
  {
  
      DataTable dtNew = new DataTable();
  
      dtNew.Columns.Add("File");
  
      dtNew.Columns.Add("Status");
  
  
  
      DataRow drow = dtNew.NewRow();
  
      int i = 0;
  
      try
  
      {
  
          string tempFilePath = string.Empty;
  
          string tempWMAFilePath = string.Empty;
  
          string FileName1 = string.Empty;
  
          string tempFilePathMp3 = string.Empty;
  
          string DestinationPath = string.Empty;
  
          string[] Filename = null;
  
          string DestiFilename1 = null;
  
          string[] DestiFilename = null;
  
          string[] Destination = null;
  
          long FileSizeMp3 = 0;
  
          FileName1 = @"D:\wma\"+"45550_AnRepository"+".wma";
  
          DestiFilename1 = @"D:\WMAConvert\" + "45550_AnRepository" + ".wav";
  
          FileName1 = FileName1.Replace(@"\", "/");
  
          Filename = FileName1.Split('/');
  
          DestiFilename1 = DestiFilename1.Replace(@"\", "/");
  
          DestiFilename = DestiFilename1.Split('/');
  
          if (Filename.Length == 3)
  
          {
  
              if (Filename[2] != null)
  
              {
  
                  tempFilePath = @"D:\wma\" + Filename[2].ToString();
  
                  tempFilePath = tempFilePath.Replace("/", @"\");
  
                  tempWMAFilePath = @"D:\WMAConvert\" + DestiFilename[2].ToString();
  
                  tempWMAFilePath = tempWMAFilePath.Replace("/", @"\");
  
  
  
                  string audioType = "wav";
  
  
  
  
  
                  if (File.Exists(tempFilePath))
  
                  {
  
                      if (audioType.ToLower().Contains("wav"))
  
                      {
  
                          try
  
                          {
  
                              //using (MemoryStream wav = new MemoryStream(fileData))
  
                              //{
  
                              tempFilePathMp3 = tempFilePath;
  
                              tempFilePathMp3 = tempFilePathMp3.Replace(@"\", "/");
  
                              Destination = tempFilePathMp3.Split('/');
  
                              tempFilePathMp3 = tempFilePathMp3.Replace("/", @"\");
  
                              tempFilePathMp3 = tempFilePathMp3.Replace(".wma", "");
  
                              DestinationPath = "D:\\WMAConvert\\"  + Destination[2];
  
                              tempFilePathMp3 = "D:\\WMAConvert\\" + Destination[2];
  
  
  
                              if (!Directory.Exists(DestinationPath))
  
                              {
  
                                  // Try to create the directory.
  
                                  DirectoryInfo di = Directory.CreateDirectory(DestinationPath);
  
                              }
  
                              tempFilePathMp3 = tempFilePathMp3.Replace(".wma", "");
  
                              if (!File.Exists(tempFilePathMp3 + ".wav"))
  
                              {
  
                                  Process p = new Process();
  
                                  p.StartInfo.WorkingDirectory = AppDomain.CurrentDomain.BaseDirectory;
  
                                  p.StartInfo.FileName = AppDomain.CurrentDomain.BaseDirectory + "\\ffmpeg.exe";
  
                                  p.StartInfo.CreateNoWindow = true;
  
                                  p.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
  
                                  p.StartInfo.Arguments = "-i " + tempFilePath + " -q:a 0 \"" + tempFilePathMp3 + ".wav\"";
  
                                  p.Start();
  
                                  p.WaitForExit();
  
                                  p.Close();
  
                              }
  
                              if (File.Exists(tempFilePathMp3 + ".wav"))
  
                              {
  
                                 // tempWMAFilePath = tempFilePathMp3 + ".wav";
  
                                  tempFilePathMp3 = @"D:\CallRecording\" + "45550_AnRepository" + ".wma";
  
                                  Process p2 = new Process();
  
                                  p2.StartInfo.WorkingDirectory = AppDomain.CurrentDomain.BaseDirectory;
  
                                  p2.StartInfo.FileName = AppDomain.CurrentDomain.BaseDirectory + "\\ffmpeg.exe";
  
                                  p2.StartInfo.CreateNoWindow = true;
  
                                  p2.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
  
                                //  ffmpeg -i recording.wav -acodec copy newrecording.wma
  
  
  
                                  p2.StartInfo.Arguments = "-i " + tempWMAFilePath + " -acodec copy \"" + tempFilePathMp3;
  
                                  p2.Start();
  
                                  p2.WaitForExit();
  
                                  p2.Close();
  
  
  
                              }
  
  
  
                          }
  
                          catch (Exception ex)
  
                          {
  
                              //We couldn't convert the file, continue with the original file.                        
  
                          }
  
  
  
  
  
                      }
  
                  }
  
              }
  
          }
  
      }
  
      catch (Exception ex)
  
      {
  
  
  
      }
  
  
  
      //dgList.Refresh();
  
  }

• doxy : Fix link in badge color

  16 décembre 2013, par Luca Barbato

  doxy : Fix link in badge color
  Green on blue was not exactly optimal.
  Signed-off-by : Luca Barbato <lu_zero@gentoo.org>
  

  • [DBH] doc/doxy/doxy_stylesheet.css

• Detection of virtual background on video using ffmpeg

  28 juillet 2021, par Marcos G

  I am trying with ffmpeg to detect the use of a virtual background on a video, like the ones used in Google Meet. I got some ideas, but none seem to work :

  


  

  • Egde color : When using a chroma key you can get shades of green/blue on the outline of the subject. This is called spill, and can be detectable, but gets discarded by the fact that you dont need a chroma key to fake a background (example : Google Meet).

  


  • Still image : Most of virtual backgrounds are a still image pasted behind the subject. The problem with detecting this is that most of the real backgrounds also are like still images, without much movement.

  


  • Blur : When faking a background without a chroma key the outline of the subject becomes very blurry (this is more noticeable when the subject moves), but I can't find a way to detect it using ffmpeg.

  


  


  How can I do this ? I'm open to trying other tecniques such as AI.

  


  Thanks in advance.