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• How would I get a Java program that uses FFmpeg to work on other machines ?

  13 mars 2024, par user18730690

  I have a Java program that records the user's screen and microphone audio, combines them by converting the video into an avi file and combining the .wav and .avi file (both converting the video into an .avi and the combining them use FFmpeg in the Java file using ProcessBuilder), and it spits out a .mp4 file that has both the microphone audio and the desktop visuals. When I run it on my machine it works fine, and while it works to some extent on other machines, it doesn't execute the FFmpeg code's functions (such as combining the audio and visuals). Is there anyway to either install FFmpeg automatically when the program first runs or not have the other machine need to install FFmpeg or otherwise ? This is meant for other users to utilize and I think it would be a pain for people to have to install FFmpeg individually.

  


  I have tried to bundle the ffmpeg.exe with the program and install it after it runs but it doesn't seem to install it as I intended it to do :

  


      public static void installFFmpeg() {
        try {
            // Get the directory where the FFmpeg binary will be installed
            String installDir = System.getProperty("user.home") + File.separator + "ffmpeg";

            // Create the installation directory if it doesn't exist
            Files.createDirectories(Paths.get(installDir));

            // Extract FFmpeg binary from resources to the installation directory
            extractResource("/ffmpeg/ffmpeg.exe", installDir + File.separator + "ffmpeg.exe");

            // Set the environment variable for FFmpeg binary path
            System.setProperty("ffmpeg.path", installDir);
            System.out.println("FFmpeg installed successfully.");

        } catch (IOException e) {
            System.err.println("Error installing FFmpeg: " + e.getMessage());
        }
    }

    public static void extractResource(String resourceName, String targetPath) throws IOException {
        InputStream inputStream = MainScreenRecorderFrame.class.getResourceAsStream(resourceName);
        if (inputStream != null) {
            try (FileOutputStream outputStream = new FileOutputStream(targetPath)) {
                byte[] buffer = new byte[1024];
                int length;
                while ((length = inputStream.read(buffer)) != -1) {
                    outputStream.write(buffer, 0, length);
                }
            }
        } else {
            throw new IOException("Resource not found: " + resourceName);
        }
    }
    //FFmpeg installation end```




  


• java bufferedimage array data immediately changes

  26 mars 2016, par ken

      import javax.imageio.ImageIO;
  
  
  
      import org.bytedeco.javacv.FFmpegFrameGrabber;
  
  
  
      public class FrameData 
  
      {   
  
  int count = 0;
  
  int picWidth;
  
  int picHeight;
  
  
  
  BufferedImage img = null;
  
  
  
  //GET FRAME COUNT
  
  public int gf_count(int numofFrames, BufferedImage[] frameArray, String fileLocationsent, String videoNamesent) throws IOException
  
  {        
  
      String fileLocation = fileLocationsent;
  
      String videoName = videoNamesent;
  
  
  
      int frameNums = numofFrames;
  
      int totFrames = 0;
  
  
  
              FFmpegFrameGrabber grab = new FFmpegFrameGrabber(fileLocation + videoName);
  
  
  
          try {   grab.start(); } 
  
          catch (Exception e) {   System.out.println("Unable to grab frames");  }
  
  
  
                      for(int i = 0 ; i < frameNums  ; i++) 
  
          {
  
              try 
  
              {                   
  
                  frameArray[i]= grab.grab().getBufferedImage();
  
                  totFrames = i;  
  
                  File outputfile = new File(fileLocation + "GrayScaledImage" + i + ".jpg");
  
                  ImageIO.write(frameArray[i], "jpg", outputfile);
  
              } 
  
              catch (Exception e) {   /*e.printStackTrace();*/    }
  
          }//END for
  
  
  
                  return totFrames;
  
  
  
      }//END METHOD long getFrameCount()

  Hope someone can explain this to me...
  I am just learning java so here goes...
  I wrote this code to count the number of frames in a .mov file and to test my buffered image array I generated files of the images. As the code is, it works as planned... The problem is immediately after the capturing, if I send the bufferedimages out as files, they all seem to be just the first image. see example below...

      for(int i = 0 ; i < frameNums  ; i++) 
  
          {
  
              try 
  
              {                   
  
                  frameArray[i]= grab.grab().getBufferedImage();
  
                  totFrames = i;  
  
                  File outputfile = new File(fileLocation + "GrayScaledImage" + i + ".jpg");
  
                  ImageIO.write(frameArray[i], "jpg", outputfile);
  
              } 
  
              catch (Exception e) {   /*e.printStackTrace();*/    }
  
          }//END for

  And now if I change that to...

      for(int i = 0 ; i < frameNums  ; i++) 
  
          {
  
              try 
  
              {                   
  
                  frameArray[i]= grab.grab().getBufferedImage();
  
                  totFrames = i;  catch (Exception e) {   /*e.printStackTrace();*/    }}
  
      for(int j = 0; j < frameNums; j++)
  
      {
  
      File outputfile = new File(fileLocation + "GrayScaledImage" + j + ".jpg");
  
                  ImageIO.write(frameArray[j], "jpg", outputfile);
  
      }

  I don’t understand why I am getting the same image repeatedly.
  If further information Is required, just lemme know, this is my first programming question online... Usually find what I am looking for that others have asked. Couldn’t find this one.
  Thanks for your time
  Ken

• Convert FLV to Mp4 using Java CV 0.8 and FFMPEG in Android

  22 février 2016, par Muthukumar S

  I am new to FFMPEG and JAVA CV. i recorded flv format frames then how to convert flv to mp4 videos programmatically.I am using recor activity code from samples folder. Advance Thanks for help.