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• java.lang.NoClassDefFoundError Android Studio Unity

  28 avril 2016, par Nestoraj

  I’m having some troubles when I try to generate a library that contains another one in Android Studio. First of all I am using Android Studio 2.0 and Unity 5.3.4f1. What I want to do is integrate FFMpeg in Unity so I decided to create my own library that use FFMpeg library as an intermediary. The FFMpeg library is here.

  To start I created a new empty project in Android Studio and inside of it, created a new module, which will be my library, using New->Module->Android Library and named it "ffmpegcodec". After that I opened build.gradle file inside the new module folder and paste :

  compile 'com.writingminds:FFmpegAndroid:0.3.2'

  inside dependencies brackets, and click Sync (It did not show any error).

  After that create a new Java Class inside src/main/java/package-name/ and named it FFMpegCodec. Inside this paste this code :

  public class FFMpegCodec {
  
  private static FFmpeg ffmpeg;
  
  private static Context context;
  
  private static FFMpegCodec INSTANCE = null;
  
  
  
  public FFMpegCodec(){
  
      INSTANCE = this;
  
  }
  
  
  
  public static FFMpegCodec instance(){
  
      if(INSTANCE == null){
  
          INSTANCE = new FFMpegCodec();
  
      }
  
      return INSTANCE;
  
  }
  
  
  
  public void setContext(Context ctx){
  
      this.context = ctx;
  
  }
  
  
  
  public void loadFFMpegBinary() {
  
      try {
  
          if (ffmpeg == null) {
  
  
  
              ffmpeg = FFmpeg.getInstance(context);
  
          }
  
          ffmpeg.loadBinary(new LoadBinaryResponseHandler() {
  
              @Override
  
              public void onFailure() {
  
                  Log.e("FFMPEG", "ffmpeg : NOT correct Loaded");
  
              }
  
  
  
              @Override
  
              public void onSuccess() {
  
                  Log.e("FFMPEG", "ffmpeg : correct Loaded");
  
              }
  
          });
  
      } catch (FFmpegNotSupportedException e) {
  
  
  
      } catch (Exception e) {
  
  
  
      }
  
  }
  
  
  
  public void execFFmpegCommand(final String[] command) {
  
      try {
  
          ffmpeg.execute(command, new ExecuteBinaryResponseHandler() {
  
              @Override
  
              public void onFailure(String s) {
  
                  Log.e("FFMPEG", "FAILED with output : " + s);
  
              }
  
  
  
              @Override
  
              public void onSuccess(String s) {
  
                  Log.e("FFMPEG", "SUCCESS with output : " + s);
  
              }
  
  
  
              @Override
  
              public void onProgress(String s) {
  
                  Log.e("FFMPEG", "Started command : ffmpeg " + command);
  
                  Log.e("FFMPEG", "progress : " + s);
  
              }
  
  
  
              @Override
  
              public void onStart() {
  
                  Log.e("FFMPEG", "Started command : ffmpeg " + command);
  
  
  
              }
  
  
  
              @Override
  
              public void onFinish() {
  
                  Log.e("FFMPEG", "Finished command : ffmpeg " + command);
  
  
  
              }
  
          });
  
      } catch (FFmpegCommandAlreadyRunningException e) {
  
          // do nothing for now
  
      }
  
  }

  It basically generates an instance of FFmpeg and makes calls of ffmpeg commands.

  Once I have my lib done I decided to test it in my project so I include my lib in my app graddle using :

  compile project(':ffmpegcodec')

  After that I just paste this code to my MainActivity :

  public class MainActivity extends AppCompatActivity {
  
  
  
  FFMpegCodec ffmpeg;
  
  
  
  @Override
  
  protected void onCreate(Bundle savedInstanceState) {
  
      super.onCreate(savedInstanceState);
  
      setContentView(R.layout.activity_main);
  
  
  
      Button execCommandButton = (Button) findViewById(R.id.execCommandButton);
  
  
  
      ffmpeg = FFMpegCodec.instance();
  
  
  
  
  
      execCommandButton.setOnClickListener(new View.OnClickListener() {
  
          @Override
  
          public void onClick(View v) {
  
              Toast.makeText(getApplicationContext(), "This is a Toast!!", Toast.LENGTH_SHORT).show();
  
              ffmpeg.setContext(MainActivity.this);
  
              ffmpeg.loadFFMpegBinary();
  
              String []cmd = new String[1];
  
              cmd[0] = "-version";
  
              ffmpeg.execFFmpegCommand(cmd);
  
          }
  
      });
  
  
  
  }

  After that, I run my project and when I press the button it returns that everythings its ok, showing ffmpeg version.
  Once I have check that my lib works I decide to move it to Unity so copy the ffmpegcodec-realese.arr file inside ffmpegcodec/build/outputs/aar folder and paste it into my Unity project. Then I wrote an C# script to use my lib that contains this :

      using System;
  
      using System.Runtime.InteropServices;
  
      using UnityEngine;
  
      using System.Collections;
  
      using System.Diagnostics;
  
  
  
      public class ScreenRecorder {
  
  
  
      private AndroidJavaObject unityActivity = null;
  
      private AndroidJavaObject captureObject = null;
  
  
  
          // Use this for initialization
  
          public ScreenRecorder () {
  
              try{
  
  
  
                  using (AndroidJavaClass unityPlayerActivityClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer")) {
  
                      unityActivity = unityPlayerActivityClass.GetStatic<androidjavaobject>("currentActivity");
  
                  }
  
  
  
                  AndroidJavaClass captureClass = new AndroidJavaClass ("com.promineostudios.ffmpegcodec.FFMpegCodec");
  
                  if (captureClass != null) {
  
                      captureObject = captureClass.CallStatic<androidjavaobject>("instance");
  
                      captureObject.Call("setContext", unityActivity);
  
                      captureObject.Call("loadFFMpegBinary");
  
                  }
  
              }catch(Exception ex){
  
                  UnityEngine.Debug.Log(ex);
  
              }
  
          }
  
  
  
      }
  
  </androidjavaobject></androidjavaobject>

  The problems comes here. When I create a class instance using :

  AndroidJavaClass captureClass = new AndroidJavaClass ("com.promineostudios.ffmpegcodec.FFMpegCodec");

  It creates an instance correctly, and also when I create an object using :

  captureObject = captureClass.CallStatic<androidjavaobject>("instance");
  
  </androidjavaobject>

  But when I try to get access to FFMpeg library methods like in "setContext" it fails and returns this :

  UnityEngine.AndroidJavaException: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/github/hiteshsondhi88/libffmpeg/FFmpeg;
  
  java.lang.NoClassDefFoundError: Failed resolution of: Lcom/github/hiteshsondhi88/libffmpeg/FFmpeg;
  
    at com.promineostudios.ffmpegcodec.FFMpegCodec.loadFFMpegBinary(FFMpegAndroidCodec.java:39)
  
    at com.unity3d.player.UnityPlayer.nativeRender(Native Method)
  
    at com.unity3d.player.UnityPlayer.a(Unknown Source)
  
    at com.unity3d.player.UnityPlayer$b.run(Unknown Source)
  
  Caused by: java.lang.ClassNotFoundException: Didn't find class "com.github.hiteshsondhi88.libffmpeg.FFmpeg" on path: DexPathList[[zip file "/data/app/com.promineostudios.ffmpegmodule-1/base.apk"],nativeLibraryDirectories=[/data/app/com.promineostudios.ffmpegmodule-1/lib/arm, /vendor/lib, /system/lib]]
  
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
  
    at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
  
    at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
  
    at com.promineostudios.ffmpegcodec.FFMpegCodec.loadFFMpegBinary(FFMpegAndroidCodec.java:39) 
  
    at com.unity3d.player.UnityPlayer.nativeRender(Native Method) 
  
    at com.unity3d.player.UnityPlayer.a(Unknown Source) 
  
    at com.unity3d.player.UnityPlayer$b.run(Unknown Source)

  I think that the problem is in when I export my lib into Unity but I do not know what is going wrong. If anybody could help me I will be really appreciated.

  Thanks and excuse me for my English.

• Android watermark : Fatal signal 4 (SIGILL), code 2, fault addr 0xe2166842 in tid 13693 (atermarkvideo_2

  27 avril 2016, par Sakibmohammad Syed

  I am using ffmpeg library for watermark on video and below is my code but when I run program the it show error like Fatal signal 4 (SIGILL), code 2, fault addr 0xe2166842
  here is my code.

      public class MainActivity extends Activity {
  
      private String strAudioFolderPath;
  
      @Override
  
      protected void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.activity_main);
  
  
  
          strAudioFolderPath = "/sdcard/Download";
  
          String s = "ffmpeg -i /sdcard/Download/testing.mp4 -i /sdcard/test.png -filter_complex 'overlay=10:main_h-overlay_h-10' /sdcard/Download/out.mp4";
  
  
  
          GeneralUtils.deleteFileUtil(strAudioFolderPath + "vk.log");
  
  
  
          PowerManager powerManager = (PowerManager) this.getSystemService(Activity.POWER_SERVICE);
  
          PowerManager.WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "VK_LOCK");
  
          wakeLock.acquire();
  
          LoadJNI vk = new LoadJNI();
  
          try {
  
              try {
  
                  vk.run(GeneralUtils.utilConvertToComplex(s), strAudioFolderPath, MainActivity.this);
  
                  Log.e("Checking water marker", ">>>>>>>>>>>>>>>");
  
  
  
              } catch (Throwable e) {
  
              } finally {
  
                  if (wakeLock.isHeld())
  
                      wakeLock.release();
  
                  else {
  
                  }
  
              }
  
          } catch (Exception e)
  
          {
  
              e.printStackTrace();
  
          }
  
      }

  Actually I want to add watermark on video file using ffmpeg library but it show error as I mention above so I am unable to watermak on video. I have also seach a lot to solve this issue but I did not find any proper solution of this problem.

• Surface Texture object is not getting the frames from a Surface Class

  22 avril 2016, par Juan Manuel González Otero

  On the one hand, I have a Surface Class which when instantiated, automatically initialize a new thread and start grabbing frames from a streaming source via native code based on FFMPEG. Here is the main parts of the code for the aforementioned Surface Class :

   public class StreamingSurface extends Surface implements Runnable {
  
  
  
      ...
  
  
  
      public StreamingSurface(SurfaceTexture surfaceTexture, int width, int height) {
  
          super(surfaceTexture);
  
  
  
          screenWidth  = width;
  
          screenHeight = height;      
  
          init();
  
  
  
      }
  
  
  
      public void init() {
  
          mDrawTop = 0;
  
          mDrawLeft = 0;
  
          mVideoCurrentFrame = 0;
  
          this.setVideoFile();
  
          this.startPlay();
  
      }
  
  
  
      public void setVideoFile() {        
  
          // Initialise FFMPEG
  
          naInit("");
  
  
  
          // Get stream video res
  
          int[] res = naGetVideoRes();
  
          mDisplayWidth = (int)(res[0]);
  
          mDisplayHeight = (int)(res[1]);
  
  
  
          // Prepare Display
  
          mBitmap = Bitmap.createBitmap(mDisplayWidth, mDisplayHeight, Bitmap.Config.ARGB_8888);
  
          naPrepareDisplay(mBitmap, mDisplayWidth, mDisplayHeight);
  
      }
  
  
  
      public void startPlay() {
  
          thread = new Thread(this);
  
          thread.start(); 
  
      }
  
  
  
      @Override
  
      public void run() {
  
          while (true) {
  
              while (2 == mStatus) {
  
                  //pause
  
                  SystemClock.sleep(100);
  
              }
  
              mVideoCurrentFrame = naGetVideoFrame();
  
              if (0 < mVideoCurrentFrame) {
  
                  //success, redraw
  
                  if(isValid()){
  
                       Canvas canvas = lockCanvas(null);
  
                       if (null != mBitmap) {
  
                           canvas.drawBitmap(mBitmap, mDrawLeft, mDrawTop, prFramePaint);
  
                       }
  
                       unlockCanvasAndPost(canvas);
  
                  }
  
              } else {
  
                  //failure, probably end of video, break
  
                  naFinish(mBitmap);
  
                  mStatus = 0;
  
                  break;
  
              }
  
          }   
  
      }
  
  
  
  }

  In my MainActivity class, I instantiated this class in the following way :

  public void startCamera(int texture)
  
  {
  
      mSurface = new SurfaceTexture(texture);
  
      mSurface.setOnFrameAvailableListener(this); 
  
      Surface surface = new StreamingSurface(mSurface, 640, 360);
  
      surface.release();        
  
  }

  I read the following line in the Android developer page, regarding the Surface class constructor :

  "Images drawn to the Surface will be made available to the SurfaceTexture, which can attach them to an OpenGL ES texture via updateTexImage()."

  That is exactly what I want to do, and I have everything ready for the further renderization. But definitely, with the above code, I never get my frames captured in the surface class transformed to its corresponding SurfaceTexture. I know this because the debugger, for instace, never call the OnFrameAvailableLister method associated with that Surface Texture.

  Any ideas ? Maybe the fact that I am using a thread to call the drawing functions is messing everything ? In such a case, what alternatives I have to grab the frames ?

  Thanks in advance