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• Android + OpenCV + video recorder

  19 février 2016, par t0m

  I have problem with code, which is functional only for Genymotion device (Android 4.1.1), but for Genymotion device 5.0.1 and real device Huawei honor 4c Android 4.4.2 not.

  I have imported OpenCV 3.1 to Android studio by : http://stackoverflow.com/a/27421494/4244605
  I added JavaCV with FFmpeg by : https://github.com/bytedeco/javacv

  minSdkVersion 15
  compileSdkVersion 23

  OpenCVCameraActivity.java :

  package co.timeiseverything.pstimeiseverything;
  
  
  
  import android.app.Activity;
  
  import android.hardware.Camera;
  
  import android.media.AudioFormat;
  
  import android.media.AudioRecord;
  
  import android.media.MediaRecorder;
  
  import android.os.Bundle;
  
  import android.os.Environment;
  
  import android.util.Log;
  
  import android.view.Menu;
  
  import android.view.MenuItem;
  
  import android.view.MotionEvent;
  
  import android.view.SubMenu;
  
  import android.view.SurfaceView;
  
  import android.view.View;
  
  import android.view.WindowManager;
  
  import android.widget.Toast;
  
  
  
  import org.bytedeco.javacv.FFmpegFrameRecorder;
  
  import org.bytedeco.javacv.Frame;
  
  import org.opencv.android.BaseLoaderCallback;
  
  import org.opencv.android.CameraBridgeViewBase;
  
  import org.opencv.android.LoaderCallbackInterface;
  
  import org.opencv.android.OpenCVLoader;
  
  import org.opencv.core.Mat;
  
  
  
  import java.io.File;
  
  import java.nio.ShortBuffer;
  
  import java.text.SimpleDateFormat;
  
  import java.util.Date;
  
  import java.util.List;
  
  import java.util.ListIterator;
  
  
  
  @SuppressWarnings("ALL")
  
  public class OpenCVCameraActivity extends Activity implements
  
          CameraBridgeViewBase.CvCameraViewListener2,
  
          View.OnTouchListener {
  
  
  
      //name of activity, for DEBUGGING
  
      private static final String TAG = OpenCVCameraActivity.class.getSimpleName();
  
  
  
      private OpenCVCameraPreview mOpenCvCameraView;
  
      private List mResolutionList;
  
      private MenuItem[] mEffectMenuItems;
  
      private SubMenu mColorEffectsMenu;
  
      private MenuItem[] mResolutionMenuItems;
  
      private SubMenu mResolutionMenu;
  
  
  
      private static long frameCounter = 0;
  
  
  
      long startTime = 0;
  
      private Mat edgesMat;
  
      boolean recording = false;
  
      private int sampleAudioRateInHz = 44100;
  
      private int imageWidth = 1920;
  
      private int imageHeight = 1080;
  
      private int frameRate = 30;
  
      private Frame yuvImage = null;
  
      private File ffmpeg_link;
  
      private FFmpegFrameRecorder recorder;
  
  
  
      /* audio data getting thread */
  
      private AudioRecord audioRecord;
  
      private AudioRecordRunnable audioRecordRunnable;
  
      private Thread audioThread;
  
      volatile boolean runAudioThread = true;
  
      ShortBuffer[] samples;
  
  
  
  
  
      private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
  
          @Override
  
          public void onManagerConnected(int status) {
  
              switch (status) {
  
                  case LoaderCallbackInterface.SUCCESS:
  
                      Log.i(TAG, "OpenCV loaded successfully");
  
                      mOpenCvCameraView.enableView();
  
                      mOpenCvCameraView.setOnTouchListener(OpenCVCameraActivity.this);
  
                  break;
  
                  default:
  
                      super.onManagerConnected(status);
  
                  break;
  
              }
  
          }
  
      };
  
  
  
      @Override
  
      protected void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          if(Static.DEBUG) Log.i(TAG, "onCreate()");
  
  
  
          getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
  
  
  
          try {
  
              setContentView(R.layout.activity_opencv);
  
  
  
              mOpenCvCameraView = (OpenCVCameraPreview) findViewById(R.id.openCVCameraPreview);
  
              mOpenCvCameraView.setVisibility(SurfaceView.VISIBLE);
  
              mOpenCvCameraView.setCvCameraViewListener(this);
  
  
  
              //mOpenCvCameraView.enableFpsMeter();
  
  
  
              ffmpeg_link = new File(Environment.getExternalStorageDirectory(), "stream.mp4");
  
          } catch (Exception e){
  
              e.printStackTrace();
  
          }
  
      }
  
  
  
      @Override
  
      protected void onRestart() {
  
          if (Static.DEBUG) Log.i(TAG, "onRestart()");
  
          super.onRestart();
  
      }
  
  
  
      @Override
  
      protected void onStart() {
  
          if (Static.DEBUG) Log.i(TAG, "onStart()");
  
          super.onStart();
  
      }
  
  
  
      @Override
  
      protected void onResume() {
  
          if (Static.DEBUG) Log.i(TAG, "onResume()");
  
          super.onResume();
  
  
  
          if (!OpenCVLoader.initDebug()) {
  
              Log.i(TAG, "Internal OpenCV library not found. Using OpenCV Manager for initialization");
  
              OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_11, this, mLoaderCallback);
  
          } else {
  
              Log.i(TAG, "OpenCV library found inside package. Using it!");
  
              mLoaderCallback.onManagerConnected(LoaderCallbackInterface.SUCCESS);
  
          }
  
  
  
      }
  
  
  
      @Override
  
      public boolean onCreateOptionsMenu(Menu menu) {
  
          if (Static.DEBUG) Log.i(TAG, "onCreateOptionsMenu()");
  
          super.onCreateOptionsMenu(menu);
  
  
  
          List<string> effects = mOpenCvCameraView.getEffectList();
  
  
  
          if (effects == null) {
  
              Log.e(TAG, "Color effects are not supported by device!");
  
              return true;
  
          }
  
  
  
          mColorEffectsMenu = menu.addSubMenu("Color Effect");
  
          mEffectMenuItems = new MenuItem[effects.size()];
  
  
  
          int idx = 0;
  
          ListIterator<string> effectItr = effects.listIterator();
  
          while(effectItr.hasNext()) {
  
              String element = effectItr.next();
  
              mEffectMenuItems[idx] = mColorEffectsMenu.add(1, idx, Menu.NONE, element);
  
              idx++;
  
          }
  
  
  
          mResolutionMenu = menu.addSubMenu("Resolution");
  
          mResolutionList = mOpenCvCameraView.getResolutionList();
  
          mResolutionMenuItems = new MenuItem[mResolutionList.size()];
  
  
  
          ListIterator resolutionItr = mResolutionList.listIterator();
  
          idx = 0;
  
          while(resolutionItr.hasNext()) {
  
              Camera.Size element = resolutionItr.next();
  
              mResolutionMenuItems[idx] = mResolutionMenu.add(2, idx, Menu.NONE,
  
                      Integer.valueOf(element.width).toString() + "x" + Integer.valueOf(element.height).toString());
  
              idx++;
  
          }
  
  
  
          return true;
  
      }
  
  
  
      @Override
  
      protected void onPause() {
  
          if (Static.DEBUG) Log.i(TAG, "onPause()");
  
          super.onPause();
  
  
  
          if (mOpenCvCameraView != null)
  
              mOpenCvCameraView.disableView();
  
  
  
      }
  
  
  
      @Override
  
      protected void onStop() {
  
          if (Static.DEBUG) Log.i(TAG, "onStop()");
  
          super.onStop();
  
      }
  
  
  
      @Override
  
      protected void onDestroy() {
  
          if (Static.DEBUG) Log.i(TAG, "onDestroy()");
  
          super.onDestroy();
  
  
  
          if (mOpenCvCameraView != null)
  
              mOpenCvCameraView.disableView();
  
      }
  
  
  
      public Mat onCameraFrame(CameraBridgeViewBase.CvCameraViewFrame inputFrame) {
  
  
  
          ++frameCounter;
  
          //Log.i(TAG, "Frame number: "+frameCounter);
  
  
  
          return inputFrame.rgba();
  
      }
  
  
  
  
  
      @Override
  
      public void onCameraViewStarted(int width, int height) {
  
          edgesMat = new Mat();
  
      }
  
  
  
      @Override
  
      public void onCameraViewStopped() {
  
          if (edgesMat != null)
  
              edgesMat.release();
  
  
  
          edgesMat = null;
  
      }
  
  
  
      public boolean onOptionsItemSelected(MenuItem item) {
  
          Log.i(TAG, "called onOptionsItemSelected; selected item: " + item);
  
          if (item.getGroupId() == 1)
  
          {
  
              mOpenCvCameraView.setEffect((String) item.getTitle());
  
              Toast.makeText(this, mOpenCvCameraView.getEffect(), Toast.LENGTH_SHORT).show();
  
          } else if (item.getGroupId() == 2) {
  
              int id = item.getItemId();
  
              Camera.Size resolution = mResolutionList.get(id);
  
              mOpenCvCameraView.setResolution(resolution);
  
              resolution = mOpenCvCameraView.getResolution();
  
              String caption = Integer.valueOf(resolution.width).toString() + "x" + Integer.valueOf(resolution.height).toString();
  
              Toast.makeText(this, caption, Toast.LENGTH_SHORT).show();
  
          }
  
  
  
          return true;
  
      }
  
  
  
      @Override
  
      public boolean onTouch(View v, MotionEvent event) {
  
          Log.i(TAG,"onTouch event");
  
          SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss");
  
          String currentDateandTime = sdf.format(new Date());
  
          String fileName = Environment.getExternalStorageDirectory().getPath() +
  
                  "/sample_picture_" + currentDateandTime + ".jpg";
  
          mOpenCvCameraView.takePicture(fileName);
  
          Toast.makeText(this, fileName + " saved", Toast.LENGTH_SHORT).show();
  
          return false;
  
      }
  
  
  
      /**
  
       * Click to ImageButton to start recording.
  
       */
  
      public void onClickBtnStartRecord2(View v) {
  
          if (Static.DEBUG) Log.i(TAG, "onClickBtnStartRecord()");
  
  
  
          if(!recording)
  
              startRecording();
  
          else
  
              stopRecording();
  
      }
  
  
  
      private void startRecording() {
  
          if (Static.DEBUG) Log.i(TAG, "startRecording()");
  
          initRecorder();
  
  
  
          try {
  
              recorder.start();
  
              startTime = System.currentTimeMillis();
  
              recording = true;
  
              audioThread.start();
  
          } catch(FFmpegFrameRecorder.Exception e) {
  
              e.printStackTrace();
  
          }
  
      }
  
  
  
      private void stopRecording() {
  
          if (Static.DEBUG) Log.i(TAG, "stopRecording()");
  
  
  
          runAudioThread = false;
  
          try {
  
              audioThread.join();
  
          } catch(InterruptedException e) {
  
              e.printStackTrace();
  
          }
  
          audioRecordRunnable = null;
  
          audioThread = null;
  
  
  
          if(recorder != null &amp;&amp; recording) {
  
  
  
              recording = false;
  
              Log.v(TAG, "Finishing recording, calling stop and release on recorder");
  
              try {
  
                  recorder.stop();
  
                  recorder.release();
  
              } catch(FFmpegFrameRecorder.Exception e) {
  
                  e.printStackTrace();
  
              }
  
              recorder = null;
  
          }
  
      }
  
  
  
  
  
      //---------------------------------------
  
      // initialize ffmpeg_recorder
  
      //---------------------------------------
  
      private void initRecorder() {
  
  
  
          Log.w(TAG, "init recorder");
  
          try {
  
  
  
              if (yuvImage == null) {
  
                  yuvImage = new Frame(imageWidth, imageHeight, Frame.DEPTH_UBYTE, 2);
  
                  Log.i(TAG, "create yuvImage");
  
              }
  
  
  
              Log.i(TAG, "ffmpeg_url: " + ffmpeg_link.getAbsolutePath());
  
              Log.i(TAG, "ffmpeg_url: " + ffmpeg_link.exists());
  
              recorder = new FFmpegFrameRecorder(ffmpeg_link, imageWidth, imageHeight, 1);
  
              recorder.setFormat("mp4");
  
              recorder.setSampleRate(sampleAudioRateInHz);
  
              // Set in the surface changed method
  
              recorder.setFrameRate(frameRate);
  
  
  
              Log.i(TAG, "recorder initialize success");
  
  
  
              audioRecordRunnable = new AudioRecordRunnable();
  
              audioThread = new Thread(audioRecordRunnable);
  
              runAudioThread = true;
  
          } catch (Exception e){
  
              e.printStackTrace();
  
          }
  
      }
  
  
  
      //---------------------------------------------
  
      // audio thread, gets and encodes audio data
  
      //---------------------------------------------
  
      class AudioRecordRunnable implements Runnable {
  
  
  
          @Override
  
          public void run() {
  
              android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
  
  
  
              // Audio
  
              int bufferSize;
  
              ShortBuffer audioData;
  
              int bufferReadResult;
  
  
  
              bufferSize = AudioRecord.getMinBufferSize(sampleAudioRateInHz,
  
                      AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
  
              audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleAudioRateInHz,
  
                      AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, bufferSize);
  
  
  
              audioData = ShortBuffer.allocate(bufferSize);
  
  
  
              Log.d(TAG, "audioRecord.startRecording()");
  
              audioRecord.startRecording();
  
  
  
              /* ffmpeg_audio encoding loop */
  
              while(runAudioThread) {
  
                  //Log.v(TAG,"recording? " + recording);
  
                  bufferReadResult = audioRecord.read(audioData.array(), 0, audioData.capacity());
  
                  audioData.limit(bufferReadResult);
  
                  if(bufferReadResult > 0) {
  
                      Log.v(TAG, "bufferReadResult: " + bufferReadResult);
  
                      // If "recording" isn't true when start this thread, it never get's set according to this if statement...!!!
  
                      // Why?  Good question...
  
                      if(recording) {
  
                              try {
  
                                  recorder.recordSamples(audioData);
  
                                  //Log.v(TAG,"recording " + 1024*i + " to " + 1024*i+1024);
  
                              } catch(FFmpegFrameRecorder.Exception e) {
  
                                  Log.v(TAG, e.getMessage());
  
                                  e.printStackTrace();
  
                              }
  
                      }
  
                  }
  
              }
  
              Log.v(TAG, "AudioThread Finished, release audioRecord");
  
  
  
              /* encoding finish, release recorder */
  
              if(audioRecord != null) {
  
                  audioRecord.stop();
  
                  audioRecord.release();
  
                  audioRecord = null;
  
                  Log.v(TAG, "audioRecord released");
  
              }
  
          }
  
      }
  
  }
  
  </string></string>

  OpenCVCameraPreview.java :

  package co.timeiseverything.pstimeiseverything;
  
  
  
  import android.content.Context;
  
  import android.hardware.Camera;
  
  import android.util.AttributeSet;
  
  import android.util.Log;
  
  
  
  import org.opencv.android.JavaCameraView;
  
  
  
  import java.io.FileOutputStream;
  
  import java.util.List;
  
  
  
  public class OpenCVCameraPreview extends JavaCameraView implements Camera.PictureCallback {
  
  
  
      private static final String TAG =  OpenCVCameraPreview.class.getSimpleName();
  
      private String mPictureFileName;
  
  
  
      public OpenCVCameraPreview(Context context, AttributeSet attrs) {
  
          super(context, attrs);
  
      }
  
  
  
      public List<string> getEffectList() {
  
          return mCamera.getParameters().getSupportedColorEffects();
  
      }
  
  
  
      public boolean isEffectSupported() {
  
          return (mCamera.getParameters().getColorEffect() != null);
  
      }
  
  
  
      public String getEffect() {
  
          return mCamera.getParameters().getColorEffect();
  
      }
  
  
  
      public void setEffect(String effect) {
  
          Camera.Parameters params = mCamera.getParameters();
  
          params.setColorEffect(effect);
  
          mCamera.setParameters(params);
  
      }
  
  
  
      public List getResolutionList() {
  
          return mCamera.getParameters().getSupportedPreviewSizes();
  
      }
  
  
  
      public void setResolution(Camera.Size resolution) {
  
          disconnectCamera();
  
          mMaxHeight = resolution.height;
  
          mMaxWidth = resolution.width;
  
          connectCamera(getWidth(), getHeight());
  
      }
  
  
  
      public Camera.Size getResolution() {
  
          return mCamera.getParameters().getPreviewSize();
  
      }
  
  
  
      public void takePicture(final String fileName) {
  
          Log.i(TAG, "Taking picture");
  
          this.mPictureFileName = fileName;
  
          // Postview and jpeg are sent in the same buffers if the queue is not empty when performing a capture.
  
          // Clear up buffers to avoid mCamera.takePicture to be stuck because of a memory issue
  
          mCamera.setPreviewCallback(null);
  
  
  
          // PictureCallback is implemented by the current class
  
          mCamera.takePicture(null, null, this);
  
      }
  
  
  
      @Override
  
      public void onPictureTaken(byte[] data, Camera camera) {
  
          Log.i(TAG, "Saving a bitmap to file");
  
          // The camera preview was automatically stopped. Start it again.
  
          mCamera.startPreview();
  
          mCamera.setPreviewCallback(this);
  
  
  
          // Write the image in a file (in jpeg format)
  
          try {
  
              FileOutputStream fos = new FileOutputStream(mPictureFileName);
  
  
  
              fos.write(data);
  
              fos.close();
  
  
  
          } catch (java.io.IOException e) {
  
              Log.e("PictureDemo", "Exception in photoCallback", e);
  
          }
  
  
  
      }
  
  }
  
  </string>

  Gradle :

  apply plugin: 'com.android.application'
  
  
  
  android {
  
      compileSdkVersion 23
  
      buildToolsVersion "23.0.2"
  
  
  
      defaultConfig {
  
          applicationId "co.timeiseverything.pstimeiseverything"
  
          minSdkVersion 15
  
          targetSdkVersion 23
  
          versionCode 1
  
          versionName "1.0"
  
      }
  
      buildTypes {
  
          release {
  
              minifyEnabled false
  
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
  
          }
  
      }
  
  
  
      packagingOptions {
  
          exclude 'META-INF/maven/org.bytedeco.javacpp-presets/opencv/pom.properties'
  
          exclude 'META-INF/maven/org.bytedeco.javacpp-presets/opencv/pom.xml'
  
          exclude 'META-INF/maven/org.bytedeco.javacpp-presets/ffmpeg/pom.properties'
  
          exclude 'META-INF/maven/org.bytedeco.javacpp-presets/ffmpeg/pom.xml'
  
      }
  
  }
  
  
  
  repositories {
  
      mavenCentral()
  
  }
  
  
  
  dependencies {
  
      compile fileTree(include: ['*.jar'], dir: 'libs')
  
      testCompile 'junit:junit:4.12'
  
      compile 'com.android.support:appcompat-v7:23.1.1'
  
      compile 'com.google.android.gms:play-services-appindexing:8.1.0'
  
  
  
      compile group: 'org.bytedeco', name: 'javacv', version: '1.1'
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.0.0-1.1', classifier: 'android-arm'
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.0.0-1.1', classifier: 'android-x86'
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '2.8.1-1.1', classifier: 'android-arm'
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '2.8.1-1.1', classifier: 'android-x86'
  
  
  
      compile project(':openCVLibrary310')
  
  }

  proguard-rules.pro
  Edited by : link

  jniLibs :
  app/src/main/jniLibs :

  armeabi armeabi-v7a arm64-v8a mips mips64 x86 x86_64

  Problem

  02-19 11:57:37.684 1759-1759/ I/OpenCVCameraActivity: onClickBtnStartRecord()
  
  02-19 11:57:37.684 1759-1759/ I/OpenCVCameraActivity: startRecording()
  
  02-19 11:57:37.684 1759-1759/ W/OpenCVCameraActivity: init recorder
  
  02-19 11:57:37.691 1759-1759/ I/OpenCVCameraActivity: create yuvImage
  
  02-19 11:57:37.691 1759-1759/ I/OpenCVCameraActivity: ffmpeg_url: /storage/emulated/0/stream.mp4
  
  02-19 11:57:37.696 1759-1759/ I/OpenCVCameraActivity: ffmpeg_url: false
  
  02-19 11:57:37.837 1759-1759/ W/linker: libjniavutil.so: unused DT entry: type 0x1d arg 0x18cc3
  
  02-19 11:57:37.837 1759-1759/ W/linker: libjniavutil.so: unused DT entry: type 0x6ffffffe arg 0x21c30
  
  02-19 11:57:37.837 1759-1759/ W/linker: libjniavutil.so: unused DT entry: type 0x6fffffff arg 0x1
  
  02-19 11:57:37.838 1759-1759/co.timeiseverything.pstimeiseverything E/art: dlopen("/data/app/co.timeiseverything.pstimeiseverything-2/lib/x86/libjniavutil.so", RTLD_LAZY) failed: dlopen failed: cannot locate symbol "av_version_info" referenced by "libjniavutil.so"...
  
  02-19 11:57:37.843 1759-1759/co.timeiseverything.pstimeiseverything I/art: Rejecting re-init on previously-failed class java.lang.Class
  
  02-19 11:57:37.844 1759-1759/co.timeiseverything.pstimeiseverything E/AndroidRuntime: FATAL EXCEPTION: main
  
                                          Process: co.timeiseverything.pstimeiseverything, PID: 1759
  
                                          java.lang.IllegalStateException: Could not execute method of the activity
  
                                              at android.view.View$1.onClick(View.java:4020)
  
                                              at android.view.View.performClick(View.java:4780)
  
                                              at android.view.View$PerformClick.run(View.java:19866)
  
                                              at android.os.Handler.handleCallback(Handler.java:739)
  
                                              at android.os.Handler.dispatchMessage(Handler.java:95)
  
                                              at android.os.Looper.loop(Looper.java:135)
  
                                              at android.app.ActivityThread.main(ActivityThread.java:5254)
  
                                              at java.lang.reflect.Method.invoke(Native Method)
  
                                              at java.lang.reflect.Method.invoke(Method.java:372)
  
                                              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
  
                                              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
  
                                           Caused by: java.lang.reflect.InvocationTargetException
  
                                              at java.lang.reflect.Method.invoke(Native Method)
  
                                              at java.lang.reflect.Method.invoke(Method.java:372)
  
                                              at android.view.View$1.onClick(View.java:4015)
  
                                              at android.view.View.performClick(View.java:4780) 
  
                                              at android.view.View$PerformClick.run(View.java:19866) 
  
                                              at android.os.Handler.handleCallback(Handler.java:739) 
  
                                              at android.os.Handler.dispatchMessage(Handler.java:95) 
  
                                              at android.os.Looper.loop(Looper.java:135) 
  
                                              at android.app.ActivityThread.main(ActivityThread.java:5254) 
  
                                              at java.lang.reflect.Method.invoke(Native Method) 
  
                                              at java.lang.reflect.Method.invoke(Method.java:372) 
  
                                              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) 
  
                                              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 
  
                                           Caused by: java.lang.UnsatisfiedLinkError: org.bytedeco.javacpp.avutil
  
                                              at java.lang.Class.classForName(Native Method)
  
                                              at java.lang.Class.forName(Class.java:309)
  
                                              at org.bytedeco.javacpp.Loader.load(Loader.java:413)
  
                                              at org.bytedeco.javacpp.Loader.load(Loader.java:381)
  
                                              at org.bytedeco.javacpp.avcodec$AVPacket.<clinit>(avcodec.java:1650)
  
                                              at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:149)
  
                                              at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:129)
  
                                              at co.timeiseverything.pstimeiseverything.OpenCVCameraActivity.initRecorder(OpenCVCameraActivity.java:320)
  
                                              at co.timeiseverything.pstimeiseverything.OpenCVCameraActivity.startRecording(OpenCVCameraActivity.java:266)
  
                                              at co.timeiseverything.pstimeiseverything.OpenCVCameraActivity.onClickBtnStartRecord2(OpenCVCameraActivity.java:259)
  
                                              at java.lang.reflect.Method.invoke(Native Method) 
  
                                              at java.lang.reflect.Method.invoke(Method.java:372) 
  
                                              at android.view.View$1.onClick(View.java:4015) 
  
                                              at android.view.View.performClick(View.java:4780) 
  
                                              at android.view.View$PerformClick.run(View.java:19866) 
  
                                              at android.os.Handler.handleCallback(Handler.java:739) 
  
                                              at android.os.Handler.dispatchMessage(Handler.java:95) 
  
                                              at android.os.Looper.loop(Looper.java:135) 
  
                                              at android.app.ActivityThread.main(ActivityThread.java:5254) 
  
                                              at java.lang.reflect.Method.invoke(Native Method) 
  
                                              at java.lang.reflect.Method.invoke(Method.java:372) 
  
                                              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) 
  
                                              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 
  
  </init></init></clinit>

• Easy Tricks for Finding WebM Videos in YouTube

  9 août 2010, par noreply@blogger.com (John Luther)

  Since the WebM project launch, YouTube has been encoding videos uploaded at 720p or higher resolution in the WebM format. Today, the one million most popular videos of any size on YouTube are also available in the WebM format.

  We have instructions on our project site for finding these videos but they require adding a special parameter onto the end of each search query. All of the browsers that support WebM can create search shortcuts with custom parameters, however, so we’ve compiled instructions for making it very simple to search for WebM videos in YouTube.

  Important : First, make sure you have a supported browser and are enrolled in the YouTube HTML5 beta by going to http://youtube.com/html5 and clicking Enter the HTML5 Beta.

  Creating a WebM Search Shortcut

  Firefox 4 Beta :
  

  1. Select Bookmarks > Organize Bookmarks. A bookmark manager dialog opens.
  2. In the left column, choose a location for the new bookmark you’re creating. Next, choose Organize > New Bookmark (on MacOS click the gear icon). The new bookmark dialog opens.
  3. In the Name box, type WebM.
  4. In the Location box, type http://youtube.com/results?search_query=%s&webm=1.
  5. In the Keyword box, type webm.
  6. Click Add.

  Google Chrome Early Release Channel :
  

  1. On Windows and Linux, click the Chrome wrench icon in the toolbar and select Options. On MacOS, select Chrome > Preferences.
  2. On the Basics tab, click the Manage button in the Default Search section.
  3. On Windows and Linux, click Add. On MacOS X, click the plus (+) button.
  4. In the Name box, type WebM.
  5. In the Keyword box, type webm.
  6. In the URL box, type http://youtube.com/results?search_query=%s&webm=1.
  7. Click OK.

  Opera 10.60 and later :
  

  1. Go to http://youtube.com.
  2. Right-click in the YouTube search box at the top of the page and select Create Search. On MacOS, use Ctrl+click if you don’t a secondary mouse button enabled.
  3. In the Name box, type WebM.
  4. In the Keyword box, type webm.
  5. In the Address box, type http://youtube.com/results?search_query=%s&webm=1.
  6. Click OK.

  
  

  
  Now you’re ready to search. In the location box of the browser, type webm monster trucks. The YouTube search results page will open with a selection of monster truck videos encoded in the WebM format. When watching a video, look for the HTML5 WebM indicator in the player control bar.

  If you can’t find WebM videos it is most likely a browser cookie problem. Your enrollment in the YouTube HTML5 beta test is stored in a browser cookie (not in your YouTube or Google account), and that cookie can expire. Visit http://youtube.com/html5 and opt-in again to re-set the cookie.

  Directly Accessing WebM Videos by URL

  To find out if any YouTube video is available in WebM, simply add &html5=True (make sure True is capitalized) to the end of the video URL. If there is a WebM version of the video, it will open instead of the Flash version. For example :
  

  • Flash version : http://www.youtube.com/watch?v=Dz6gFokvOr0
  • WebM version : http://www.youtube.com/watch?v=Dz6gFokvOr0&html5=True

  

• New FATE Test Coverage System

  10 août 2010, par Multimedia Mike — FATE Server

  I’ve been feeling a bit scattered for the last week since I was fired from my volunteer position as the FFmpeg QA manager, wondering if there is anything I should attempt to do with the project. It can’t be denied that the new system is working well. But one area I’ve wondered about is test coverage.

  Under my old regime I tracked test coverage as a wiki page which was a highly flawed method— tedious and error-prone. There are those 2 adjectives again— tedious and error-prone ; whenever I see those, I search for automation methods. I think that might be more plausible thanks to the new FATE’s tighter integration with the FFmpeg build system.

  I don’t think anyone is working on this problem so I wanted to toss out a brainstorm :

  1. First, run ’ffmpeg -formats’, ’ffmpeg -codecs’, etc. and parse the output to collect a list of all the features (full list : -formats, -codecs, -bsfs, -protocols, -filters, -pix_fmts). Transform these lists into a standardized list of features, e.g., "DEVSD  ffvhuff         Huffyuv FFmpeg variant" represents features ’decode-video-ffvhuff’, ’encode-video-ffvhuff’, ’ffvhuff-horizband’, and ’ffvhuff-dr1’.
  2. Next, tag each individual test spec with the features that it exercises. E.g., test ’fate-vqa-cc’ exercises features ’demux-wsvqa’, ’decode-video-vqavideo’, and ’decode-audio-adpcm_ima_ws’.
  3. Finally, compare the data from parts 1 and 2. Print a list of all the features that are not exercised in FATE.

  I think a lot of this could be implemented at the GNU make level. Then again, I’m no expert on GNU make syntax so I may be overestimating its capabilities. Or there might be simpler ways to automatically track test coverage stats based on the improved testing infrastructure.