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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.

  • java.lang.NoClassDefFoundError Android Studio Unity

    26 juin 2017, 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.

  • ffmpeg x11grab Fedora 22 cannot open display [on hold]

    4 août 2015, par voor

    Running a fairly recent version of Fedora 22 :

    Linux localhost 4.1.3-200.fc22.x86_64 #1 SMP Wed Jul 22 19:51:58 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

    Dual screen Acer XB270HU and AOC 2369. Also uses NVIDIA Drivers :

    ➜  ~  rpm -qa | grep nvidia
    
nvidia-driver-libs-352.30-1.fc22.x86_64
    
nvidia-driver-352.30-1.fc22.x86_64
    
nvidia-settings-352.30-1.fc22.x86_64
    
nvidia-libXNVCtrl-352.30-1.fc22.x86_64
    
dkms-nvidia-352.30-1.fc22.x86_64
    
nvidia-driver-libs-352.30-1.fc22.i686

    Whenever I attempt to do a x11grab in ffmpeg I get an error :

    ➜  ~  ffmpeg -f x11grab -r 15 -s 1920x1080 -i :0 -vcodec h264 -crf 30 -y output.mp4
    
ffmpeg version 2.6.3 Copyright (c) 2000-2015 the FFmpeg developers
    
  built with gcc 5.1.1 (GCC) 20150422 (Red Hat 5.1.1-1)
    
  configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-frei0r --enable-gnutls --enable-ladspa --enable-libass --enable-libcdio --enable-libdc1394 --disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-openal --enable-libopencv --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-x11grab --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-runtime-cpudetect
    
  libavutil      54. 20.100 / 54. 20.100
    
  libavcodec     56. 26.100 / 56. 26.100
    
  libavformat    56. 25.101 / 56. 25.101
    
  libavdevice    56.  4.100 / 56.  4.100
    
  libavfilter     5. 11.102 /  5. 11.102
    
  libavresample   2.  1.  0 /  2.  1.  0
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  1.100 /  1.  1.100
    
  libpostproc    53.  3.100 / 53.  3.100
    
Invalid MIT-MAGIC-COOKIE-1 key[x11grab @ 0x1fe1d40] Cannot open display :0, error 1.
    
:0: Input/output error

    I’ve tried a few different commands basically copy/pasta from the web on how to do screengrabs. I don’t need audio, just video, and all of them result in the same error.

    I am able to do xwininfo without any problems :

    ➜  ~  xwininfo    
    

    
xwininfo: Please select the window about which you
    
          would like information by clicking the
    
          mouse in that window.
    

    
xwininfo: Window id: 0x1e0006c "linux - ffmpeg x11grab Fedora 22 cannot open display - Stack Overflow - Google Chrome"
    

    
  Absolute upper-left X:  0
    
  Absolute upper-left Y:  27
    
  Relative upper-left X:  0
    
  Relative upper-left Y:  27
    
  Width: 2560
    
  Height: 1413
    
  Depth: 24
    
  Visual: 0x21
    
  Visual Class: TrueColor
    
  Border width: 0
    
  Class: InputOutput
    
  Colormap: 0x20 (installed)
    
  Bit Gravity State: ForgetGravity
    
  Window Gravity State: NorthWestGravity
    
  Backing Store State: NotUseful
    
  Save Under State: no
    
  Map State: IsViewable
    
  Override Redirect State: no
    
  Corners:  +0+27  -1920+27  -1920-0  0
    
  -geometry 2560x14130

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