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• video proccesing : extract frames and encrypt them then insert them back to the video in java using xuggler

  24 juillet 2015, par Anas M. Jubara

  I’m working on a video encryption application .. the main idea is to input the video file to the application and the application should output it in an encrypted form... am using xuggler library to manipulate the video and get to the frames and AES for encryption.
  my code works fine for accessing the frames and encrypting them, what i need help with is how to write the encrypted frame back to the video file to replace the original one without corrupting the video file for the video players.
  Here is my code

  package xuggler;
  
  
  
  import com.xuggle.mediatool.IMediaReader;
  
  import com.xuggle.mediatool.IMediaWriter;
  
  import com.xuggle.mediatool.MediaListenerAdapter;
  
  import com.xuggle.mediatool.ToolFactory;
  
  import com.xuggle.mediatool.event.IVideoPictureEvent;
  
  import com.xuggle.xuggler.Global;
  
  import com.xuggle.xuggler.ICodec;
  
  
  
  import java.awt.Graphics2D;
  
  import java.awt.Point;
  
  import java.awt.Transparency;
  
  import java.awt.image.BufferedImage;
  
  import java.awt.image.ColorModel;
  
  import java.awt.image.ComponentColorModel;
  
  import java.awt.image.DataBuffer;
  
  import java.awt.image.DataBufferByte;
  
  import java.awt.image.Raster;
  
  import java.awt.image.WritableRaster;
  
  
  
  import java.io.File;
  
  
  
  import java.security.InvalidKeyException;
  
  import java.security.NoSuchAlgorithmException;
  
  import java.security.SecureRandom;
  
  
  
  import java.util.concurrent.TimeUnit;
  
  import java.util.logging.Level;
  
  import java.util.logging.Logger;
  
  
  
  import javax.crypto.BadPaddingException;
  
  import javax.crypto.Cipher;
  
  import javax.crypto.IllegalBlockSizeException;
  
  import javax.crypto.KeyGenerator;
  
  import javax.crypto.NoSuchPaddingException;
  
  import javax.crypto.SecretKey;
  
  
  
  import javax.imageio.ImageIO;
  
  
  
  
  
  public class DecodeAndCaptureFrames extends MediaListenerAdapter
  
  {
  
  
  
   // The number of seconds between frames.
  
        public static final double SECONDS_BETWEEN_FRAMES = 5;
  
  
  
    //The number of micro-seconds between frames.
  
    public static final long MICRO_SECONDS_BETWEEN_FRAMES =(long)      (Global.DEFAULT_PTS_PER_SECOND * SECONDS_BETWEEN_FRAMES);
  
  
  
    // Time of last frame write
  
    private static long mLastPtsWrite = Global.NO_PTS;
  
  
  
  private static final double FRAME_RATE = 50;
  
  
  
  private static final int SECONDS_TO_RUN_FOR = 20;
  
  
  
  private static final String outputFilename = "D:\\K.mp4";
  
  
  
  public static IMediaWriter writer = ToolFactory.makeWriter(outputFilename);
  
  //receive BufferedImage and returns its byte data
  
      public static byte[] get_byte_data(BufferedImage image) {
  
      WritableRaster raster = image.getRaster();
  
      DataBufferByte buffer = (DataBufferByte) raster.getDataBuffer();
  
      return buffer.getData();
  
  }
  
  
  
  
  
  //create new_img with the attributes of image
  
  public static BufferedImage user_space(BufferedImage image) {
  
      //create new_img with the attributes of image
  
      BufferedImage new_img = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_3BYTE_BGR);
  
      Graphics2D graphics = new_img.createGraphics();
  
      graphics.drawRenderedImage(image, null);
  
      graphics.dispose(); //release all allocated memory for this image
  
      return new_img;
  
  }
  
  
  
  public static BufferedImage toImage(byte[] imagebytes, int width, int height) {
  
      DataBuffer buffer = new DataBufferByte(imagebytes, imagebytes.length);
  
      WritableRaster raster = Raster.createInterleavedRaster(buffer, width, height,
  
         3 * width, 3, new int[]{2, 1, 0}, (Point) null);
  
  
  
      ColorModel cm = new ComponentColorModel(ColorModel.getRGBdefault().getColorSpace(), 
  
              false, true, Transparency.OPAQUE, DataBuffer.TYPE_BYTE);
  
      return new BufferedImage(cm, raster, true, null);
  
  }
  
  
  
  public static byte[] encrypt(byte[] orgnlbytes, String key) throws NoSuchPaddingException, IllegalBlockSizeException, BadPaddingException {
  
      byte[] encbytes = null;
  
      try {
  
          Cipher cipher = Cipher.getInstance("AES");
  
          KeyGenerator keyGen = KeyGenerator.getInstance("AES");
  
          SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
  
          // cryptograph. secure random
  
          random.setSeed(key.getBytes());
  
  
  
          keyGen.init(128, random);
  
          // for example
  
          SecretKey secretKey = keyGen.generateKey();
  
          try {
  
              cipher.init(Cipher.ENCRYPT_MODE, secretKey);
  
          } catch (InvalidKeyException ex) {
  
              Logger.getLogger(DecodeAndCaptureFrames.class.getName()).log(Level.SEVERE, null, ex);
  
          }
  
          encbytes = cipher.doFinal(orgnlbytes);
  
      }
  
      catch (NoSuchAlgorithmException ex) {
  
          Logger.getLogger(DecodeAndCaptureFrames.class.getName()).log(Level.SEVERE, null, ex);
  
      }        catch (NoSuchPaddingException ex)
  
      {
  
          System.out.print("can not encrypt buffer");
  
      }
  
  
  
      return encbytes;
  
  }
  
  
  
  
  
    /**
  
     * The video stream index, used to ensure we display frames from one
  
     * and only one video stream from the media container.
  
     */
  
  
  
    private int mVideoStreamIndex = -1;
  
  
  
    /**
  
     * Takes a media container (file) as the first argument, opens it and
  
     *  writes some of it's video frames to PNG image files in the
  
     *  temporary directory.
  
     *
  
     * @param args must contain one string which represents a filename
  
     */
  
  
  
    public static void main(String[] args)
  
    {
  
      // create a new mr. decode and capture frames
  
  
  
  
  
      DecodeAndCaptureFrames decodeAndCaptureFrames;
  
      decodeAndCaptureFrames = new DecodeAndCaptureFrames("D:\\K.mp4");
  
    } 
  
  
  
    /** Construct a DecodeAndCaptureFrames which reads and captures
  
     * frames from a video file.
  
     *
  
     * @param filename the name of the media file to read
  
     */
  
  
  
  
  
    //makes reader to the file and read the data of it
  
    public DecodeAndCaptureFrames(String filename)
  
    {
  
      // create a media reader for processing video
  
  
  
     IMediaReader reader = ToolFactory.makeReader(filename);
  
  
  
  // stipulate that we want BufferedImages created in BGR 24bit color space
  
  reader.setBufferedImageTypeToGenerate(BufferedImage.TYPE_3BYTE_BGR);
  
  
  
  
  
  // note that DecodeAndCaptureFrames is derived from
  
  // MediaReader.ListenerAdapter and thus may be added as a listener
  
  // to the MediaReader. DecodeAndCaptureFrames implements
  
  // onVideoPicture().
  
  
  
  reader.addListener(this);
  
  
  
  // read out the contents of the media file, note that nothing else
  
  // happens here.  action happens in the onVideoPicture() method
  
  // which is called when complete video pictures are extracted from
  
  // the media source
  
  
  
  while (reader.readPacket() == null)
  
    do {} while(false);
  
    }
  
  
  
   /**
  
     * Called after a video frame has been decoded from a media stream.
  
     * Optionally a BufferedImage version of the frame may be passed
  
     * if the calling {@link IMediaReader} instance was configured to
  
     * create BufferedImages.
  
     *
  
     * This method blocks, so return quickly.
  
     */
  
  
  
    public void onVideoPicture(IVideoPictureEvent event)
  
    {
  
      try
  
      {
  
        // if the stream index does not match the selected stream index,
  
        // then have a closer look
  
  
  
    if (event.getStreamIndex() != mVideoStreamIndex)
  
    {
  
      // if the selected video stream id is not yet set, go ahead an
  
      // select this lucky video stream
  
  
  
      if (-1 == mVideoStreamIndex)
  
        mVideoStreamIndex = event.getStreamIndex();
  
  
  
      // otherwise return, no need to show frames from this video stream
  
  
  
      else
  
        return;
  
    }
  
  
  
    // if uninitialized, backdate mLastPtsWrite so we get the very
  
    // first frame
  
  
  
    if (mLastPtsWrite == Global.NO_PTS)
  
      mLastPtsWrite = event.getTimeStamp() - MICRO_SECONDS_BETWEEN_FRAMES;
  
  
  
    // if it's time to write the next frame
  
  
  
    if (event.getTimeStamp() - mLastPtsWrite >= MICRO_SECONDS_BETWEEN_FRAMES)
  
    {
  
      // Make a temporary file name
  
  
  
     // File file = File.createTempFile("frame", ".jpeg");
  
  
  
      // write out PNG
  
  
  
  //        ImageIO.write(event.getImage(), "png", file);
  
  
  
      BufferedImage orgnlimage = event.getImage();
  
          orgnlimage = user_space(orgnlimage);
  
          byte[] orgnlimagebytes = get_byte_data(orgnlimage);
  
          byte[] encryptedbytes = encrypt(orgnlimagebytes, "abc");
  
          BufferedImage encryptedimage = toImage(encryptedbytes, orgnlimage.getWidth(), orgnlimage.getHeight());
  
  
  
  
  
          ImageIO.write(encryptedimage, "png", File.createTempFile("frame", ".png"));
  
  //         indicate file written
  
  
  
      double seconds = ((double)event.getTimeStamp())
  
        / Global.DEFAULT_PTS_PER_SECOND;
  
  //        System.out.printf("at elapsed time of %6.3f seconds wrote: %s\n",seconds, file);
  
  
  
      // update last write time
  
  
  
      mLastPtsWrite += MICRO_SECONDS_BETWEEN_FRAMES;
  
    }
  
  }
  
  catch (Exception e)
  
  {
  
    e.printStackTrace();
  
  }
  
    }
  
  
  
  }

• Matomo to end support for Internet Explorer 11

  21 septembre 2021, par Matomo Core Team — Community

  A lot of the Matomo user interface is built on top of a programming framework called “Angular.js”. The support for this framework will end very soon, meaning we have to migrate the Matomo user interface to an alternative framework. The Matomo development team has chosen this new framework to be “Vue.js 3”.

  Unfortunately, Vue.js does not support Internet Explorer 11 (IE 11). Therefore, we have to drop the support for IE 11. Many other popular services like Microsoft and WordPress recently did the same. This is happening because IE 11 was released about 8 years ago and is now used by less than 0.5% of the internet. 

  When will this change happen ?

  Our next release (Matomo 4.5) will still support IE 11. It will show a notification in the user interface if you are using Internet Explorer to make you aware of this upcoming change. 

  When Matomo 4.6 is released around November 2021, then IE 11 will no longer be supported.

  What does “end support” mean ?

  The Matomo user interface will work less and less over time for people using IE 11 as a browser. While Matomo 4.6 might still mostly work with IE 11, once we migrate more of the user interface the functionality will stop working completely. It’s possible that even Matomo 4.6 will no longer be functional with IE 11 at all.

  What should I do now ?

  If you are impacted by this, then we strongly recommend that you switch to a more modern browser. Preferably a privacy-friendly browser like Mozilla Firefox or Brave. But any modern browser including Microsoft Edge, Safari and Google Chrome will work just fine.

  If you can’t use a different browser and you are using Matomo On-Premise, then you can install and configure this new plugin which lets you only receive Matomo core updates that are compatible with IE 11. This will prevent you from accidentally upgrading to a Matomo core release that doesn’t work with IE 11, and you can still receive critical security updates and bug fixes until February 2022.

  Will this affect the Matomo JavaScript tracker ?

  No, all visitors using IE 11 will still be tracked and Matomo tracker will support the same browsers as before. Meaning also some older versions of Internet Explorer are still supported.

  Have any questions about this ?

  Get in touch with us 

• Electron spawn ffmpeg ENOENT

  3 août 2022, par Menno

  I am building an Electron app to display a rtsp stream.

  


  When using the locally installed ffmpeg (/usr/local/bin/ffmpeg) on the (MacOS) Desktop all works well. Since the app needs to be distributed to different desktops and i don't want to be dependent on local installation of ffmpeg i am trying to bundle ffmpeg / fluent-ffmpeg but somehow i am missing the clue and all my attempts end up in Uncaught Error : spawn ffmpeg ENOENT

  


  I am a complete newby to Electron and nodejs and am sure i am missing a very basic concept here, somebody willing to help me out ?

  


  This is my code :

  


  main.js

  


  const { app, BrowserWindow } = require('electron');
const { ipcMain } = require('electron');
const path = require('path');

const createWindow = () => {
  const win = new BrowserWindow({
    width: 800,
    height: 600,
    webPreferences: {
      preload: path.join(__dirname, 'preload.js'),
    },
  });
    
  win.loadFile('index.html');
};

app.whenReady().then(() => {
  createWindow();

  app.on('activate', () => {
    if (BrowserWindow.getAllWindows().length === 0) {
      createWindow();
    }
  });
});

app.on('window-all-closed', () => {
  if (process.platform !== 'darwin') {
    app.quit();
  }
});


  


  index.html

  


  &#xA;&#xA;  &#xA;    &#xA;    &#xA;    &#xA;    &#xA;    &#xA;  &#xA;  &#xA;    <div class="col-sm"><h2>RTSP stream</h2><canvas class="canvas"></canvas></div>&#xA;&#xA;    &#xA;&#xA;    <code class="echappe-js">&lt;script src='http://stackoverflow.com/feeds/tag/&amp;#38;#x27;./jsmpeg.min.js&amp;#38;#x27;'&gt;&lt;/script&gt;&#xA;    &lt;script src='http://stackoverflow.com/feeds/tag/renderer.js'&gt;&lt;/script&gt;&#xA;    &#xA;&#xA;

  


  preload.js

  


  const { contextBridge, ipcRenderer } = require('electron')

const ffmpegPath = require("@ffmpeg-installer/ffmpeg").path;
const ffmpeg = require("fluent-ffmpeg");
ffmpeg.setFfmpegPath(ffmpegPath);

var stream = require('node-rtsp-stream')

stream3 = new stream({
    name: 'stream3',
    streamUrl: 'rtsp://xxx.xxx.xxx.xxx/...........',
    wsPort: 9993,
    ffmpegOptions: {

  }
})


  


  renderer.js

  


  const player = new JSMpeg.Player('ws://localhost:9993', {
      canvas: document.getElementById('canvas3'), audio: false
    })