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• FFmpeg can not open video file after adding the GLsurfaceView to render frames

  4 avril 2016, par Kyle Lo

  The source code works perfectly without any modification.

  I successfully use the below function to play the specified video.

  playview.openVideoFile("/sdcard/Test/mv.mp4");

  And for the research purpose I need to display the frame by using OpenGL ES. So I remove the original method below.

  ANativeWindow* window = ANativeWindow_fromSurface(env, javaSurface);
  
  
  
  ANativeWindow_Buffer buffer;
  
  if (ANativeWindow_lock(window, &buffer, NULL) == 0) {
  
    memcpy(buffer.bits, pixels,  w * h * 2);
  
    ANativeWindow_unlockAndPost(window);
  
  }
  
  
  
  ANativeWindow_release(window);

  And I add FrameRenderer class into my project

  public class FrameRenderer implements GLSurfaceView.Renderer {
  
  
  
      public long time = 0;
  
      public short framerate = 0;
  
      public long fpsTime = 0;
  
      public long frameTime = 0;
  
      public float avgFPS = 0;
  
      private PlayNative mNative = null;
  
  
  
      @Override
  
      public void onSurfaceCreated(GL10 gl, EGLConfig config) {/*do nothing*/}
  
  
  
      @Override
  
      public void onSurfaceChanged(GL10 gl, int width, int height) {
  
  
  
      }
  
  
  
      @Override
  
      public void onDrawFrame(GL10 gl) {
  
          mNative.render();
  
      }

  In the native side I create a corresponding method in VideoPlay.cpp And I only use glClearColorto test if the OpenGL function works or not.

  void VideoPlay::render() {
  
      glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
  
      glClear(GL_COLOR_BUFFER_BIT);
  
  }

  And the onCreate is as below.

  protected void onCreate(Bundle savedInstanceState) {
  
          // TODO Auto-generated method stub
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.main_layout);
  
  
  
          playview = new PlayView(this);
  
  
  
          playview.openVideoFile("/sdcard/test_tt_racing.mp4");
  
          //playview.openVideoFile("/sdcard/big_buck_bunny.mp4");
  
  
  
          GLSurfaceView surface = (GLSurfaceView)findViewById(R.id.surfaceviewclass);
  
          surface.setRenderer(new FrameRenderer());
  
          ...

  Then test it on the mobile, the screen becomes red which means the GLSurfaceView and OpenGL works fine.

  But after I press the play bottom, whole the app stucked. And Show in the
  Log

  My question is why I can open the video whose path is totally the same with the previous one, just after I added the GLsurface renderer and how can I fix it ?

• Anomalie #3765 (Fermé) : Bug spip 3.1 urls arborescentes | Jointures

  2 avril 2016, par Karen Bouscarle

  Bonjour,

  J’ai constaté que lorsqu’on sélectionne la réécriture des urls avec "urls arborescentes" (et seulement cette méthode-ci), on ne peut plus afficher ni les documents joints (quand ils ne sont pas intégrés dans le texte via un raccourci spip) ni les miniatures des images passées en portfolio.

  Après l’avoir constaté sur un site en production, je l’ai testé en local et en distant sur un SPIP natif sans squelette, ni plugin, ni réglages particuliers autres que les nécessaires.

  Je n’ai malheureusement pas les connaissances nécessaires pour contribuer, et c’est b_b qui a compris l’origine du problème, à savoir un problème avec la balise base href dans le head, puis m’a invitée à ouvrir un ticket ici. Ici notre échange : http://forum.spip.net/fr_263992.html#forum264143

  Voilà, novice ici, j’espère que j’ai fait comme il fallait, pas osé monter la priorité au dessus de "haut", c’est déjà peut-être exagéré :-) ?
  Merci à tous pour votre super et généreux boulot.

• bitmap to yuv , video recorded has only green pixels

  19 janvier 2016, par UserAx

  I am trying to convert a bitmap to yuv, and recording this yuv in the ffmpeg frame recorder...
  I am getting the video output with only green pixels, though when i check the properties of this video it shows the set Frame rate and the resolution...

  The yuv encoding part is correct, but i feel i am making mistake somewhere else, mostly in returning the yuv bytes to recording part ( getByte(byte [] yuv ) because only there the yuv.length displayed in console is 0,, rest all methods return a big value in console ...

  Kindly help...

   @Override
  
  public void onCreate(Bundle savedInstanceState) {
  
      super.onCreate(savedInstanceState);
  
      setContentView(R.layout.activity_main);
  
      directory.mkdirs();
  
  
  
      addListenerOnButton();
  
  
  
      play=(Button)findViewById(R.id.buttonplay);
  
      stop=(Button)findViewById(R.id.buttonstop);
  
      record=(Button)findViewById(R.id.buttonstart);
  
  
  
      stop.setEnabled(false);
  
      play.setEnabled(false);
  
  
  
  
  
      record.setOnClickListener(new View.OnClickListener() {
  
          @Override
  
          public void onClick(View v) {
  
              startRecording();
  
              getByte(new byte[]{});
  
          }
  
      });
  
  
  
      stop.setOnClickListener(new View.OnClickListener() {
  
          @Override
  
          public void onClick(View v) {
  
              stopRecording();
  
          }
  
      });
  
  
  
  
  
      play.setOnClickListener(new View.OnClickListener() {
  
          @Override
  
          public void onClick(View v) throws IllegalArgumentException, SecurityException, IllegalStateException {
  
              Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(String.valueOf(asmileys)));
  
              intent.setDataAndType(Uri.parse(String.valueOf(asmileys)), "video/mp4");
  
              startActivity(intent);
  
              Toast.makeText(getApplicationContext(), "Playing Video", Toast.LENGTH_LONG).show();
  
          }
  
      });
  
  
  
   }
  
  
  
  ......//......
  
  
  
  
  
  
  
  public void getByte(byte[] yuv) {
  
      getNV21(640, 480, bitmap);
  
      System.out.println(yuv.length + " ");
  
      if (audioRecord == null || audioRecord.getRecordingState() != AudioRecord.RECORDSTATE_RECORDING) {
  
          startTime = System.currentTimeMillis();
  
          return;
  
      }
  
      if (RECORD_LENGTH > 0) {
  
          int i = imagesIndex++ % images.length;
  
          yuvimage = images[i];
  
          timestamps[i] = 1000 * (System.currentTimeMillis() - startTime);
  
      }
  
          /* get video data */
  
      if (yuvimage != null && recording) {
  
              ((ByteBuffer) yuvimage.image[0].position(0)).put(yuv);
  
  
  
              if (RECORD_LENGTH <= 0) {
  
                  try {
  
                      long t = 1000 * (System.currentTimeMillis() - startTime);
  
                      if (t > recorder.getTimestamp()) {
  
                          recorder.setTimestamp(t);
  
                      }
  
                      recorder.record(yuvimage);
  
                  } catch (FFmpegFrameRecorder.Exception e) {
  
  
  
                      e.printStackTrace();
  
                  }
  
              }
  
          }
  
  }
  
  
  
  public byte [] getNV21(int inputWidth, int inputHeight, Bitmap bitmap) {
  
  
  
      int[] argb = new int[inputWidth * inputHeight];
  
  
  
      bitmap.getPixels(argb, 0, inputWidth, 0, 0, inputWidth, inputHeight);
  
  
  
      byte[] yuv = new byte[inputWidth * inputHeight * 3 / 2];
  
      encodeYUV420SP(yuv, argb, inputWidth, inputHeight);
  
  
  
      bitmap.recycle();
  
      System.out.println(yuv.length + " ");
  
      return yuv;
  
  
  
  }
  
  
  
  void encodeYUV420SP(byte[] yuv420sp, int[] argb, int width, int height) {
  
      final int frameSize = width * height;
  
  
  
      int yIndex = 0;
  
      int uIndex = frameSize;
  
      int vIndex = frameSize;
  
      System.out.println(yuv420sp.length + " " + frameSize);
  
  
  
      int a, R, G, B, Y, U, V;
  
      int index = 0;
  
      for (int j = 0; j < height; j++) {
  
          for (int i = 0; i < width; i++) {
  
  
  
              a = (argb[index] & 0xff000000) >> 24; // a is not used obviously
  
              R = (argb[index] & 0xff0000) >> 16;
  
              G = (argb[index] & 0xff00) >> 8;
  
              B = (argb[index] & 0xff) >> 0;
  
  
  
              // well known RGB to YUV algorithm
  
  
  
              Y = ((66 * R + 129 * G + 25 * B + 128) >> 8) + 16;
  
              U = ((-38 * R - 74 * G + 112 * B + 128) >> 8) + 128;
  
              V = ((112 * R - 94 * G - 18 * B + 128) >> 8) + 128;
  
  
  
              // NV21 has a plane of Y and interleaved planes of VU each sampled by a factor of 2
  
              //    meaning for every 4 Y pixels there are 1 V and 1 U.  Note the sampling is every other
  
              //    pixel AND every other scanline.
  
              yuv420sp[yIndex++] = (byte) ((Y < 0) ? 0 : ((Y > 255) ? 255 : Y));
  
              if (j % 2 == 0 && index % 2 == 0) {
  
                  yuv420sp[uIndex++] = (byte) ((U < 0) ? 0 : ((U > 255) ? 255 : U));
  
                  yuv420sp[vIndex++] = (byte) ((V < 0) ? 0 : ((V > 255) ? 255 : V));
  
              }
  
  
  
              index++;
  
          }
  
      }
  
  }
  
  
  
   .....//.....
  
  
  
   public void addListenerOnButton() {
  
   image = (ImageView) findViewById(R.id.imageView);
  
   image.setDrawingCacheEnabled(true);
  
   image.buildDrawingCache();
  
   bitmap = image.getDrawingCache();
  
   System.out.println(bitmap.getByteCount() + " " );
  
  
  
   button = (Button) findViewById(R.id.btn1);
  
   button.setOnClickListener(new OnClickListener() {
  
  @Override
  
  public void onClick(View view){
  
      image.setImageResource(R.drawable.image1);
  
    }
  
  });
  
  
  
  ......//......

  EDIT 1 :

  I made few changes in the above code :

   record.setOnClickListener(new View.OnClickListener() {
  
          @Override
  
          public void onClick(View v) {
  
              startRecording();
  
              getByte();
  
          }
  
      });
  
  .....//....
  
  
  
  public void getbyte() {
  
      byte[] yuv = getNV21(640, 480, bitmap);

  So now in the console ; i get same yuv length in this method as the yuv length from getNV21 method..

  But now i am getting half screen Black and Half screen green(black above and green below) pixels in the recorded video...

  If i add these lines to onCreate method ;

   image = (ImageView) findViewById(R.id.imageView);
  
   image.setDrawingCacheEnabled(true);
  
   image.buildDrawingCache();
  
   bitmap = image.getDrawingCache();

  I do get distorted frames( frames are 1/4th of the image displayed with mix up of colors here and there) in the video....

  All i am trying to learn is the image processing and flow of Bytes[] from one method to another ; but i am still a noob.. ;

  Kindly help..!