java.lang.UnsatisfiedLinkError: org.bytedeco.javacpp.avutil when trying to grabber.start();

[vxhviet]

Dear JavaCV developers, thanks you for creating this awesome tool.

However, I currently having a crash when trying to call grabber.start();, my code snippet:

FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(mVideoPath);

        try {
            grabber.start();
            grabber.setFrameNumber((int) (currentVideoPosition * grabber.getFrameRate() / 1000)); //get current frame base on framerate
            Frame frame = grabber.grabImage();
            AndroidFrameConverter androidFrameConverter = new AndroidFrameConverter();
            Bitmap bitmap = androidFrameConverter.convert(frame);

            return  bitmap;
        }
        catch (Exception e) {
            e.printStackTrace();
        }finally {
            try {
                grabber.stop();
            } catch (FrameGrabber.Exception e) {
                e.printStackTrace();
            }
        }

with this stack trace:

FATAL EXCEPTION: main
    Process: com.example.viet.myappdemo, PID: 11353
    java.lang.UnsatisfiedLinkError: org.bytedeco.javacpp.avutil
        at java.lang.Class.classForName(Native Method)
        at java.lang.Class.forName(Class.java:324)
        at org.bytedeco.javacpp.Loader.load(Loader.java:442)
        at org.bytedeco.javacpp.Loader.load(Loader.java:407)
        at org.bytedeco.javacpp.avformat$AVFormatContext.<clinit>(avformat.java:2719)
        at org.bytedeco.javacv.FFmpegFrameGrabber.startUnsafe(FFmpegFrameGrabber.java:386)
        at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:380)
        at com.example.viet.myappdemo.VideoActivity.getFrame(VideoActivity.java:283)
        at com.example.viet.myappdemo.VideoActivity.access$100(VideoActivity.java:43)
        at com.example.viet.myappdemo.VideoActivity$2.run(VideoActivity.java:245)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:148)
        at android.app.ActivityThread.main(ActivityThread.java:5417)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

What I've done so far:

• Download your JavaCV 1.1 binary archive javacv-1.1-bin.zip
• Extract it and put ffmpeg.jar, javacpp.jar, javacv.jar under libs folder in my Android project.
• Add them as dependency for my app module.

When I try to replace ffmpeg.jar with ffmpeg-android-arm.jar as my Nexus 5 using an armv7 architect, I get this error:

FATAL EXCEPTION: main
    Process: com.example.viet.myappdemo, PID: 23842
    java.lang.NoClassDefFoundError: Failed resolution of: Lorg/bytedeco/javacpp/avcodec;
        at org.bytedeco.javacv.FFmpegFrameGrabber.release(FFmpegFrameGrabber.java:124)
        at org.bytedeco.javacv.FFmpegFrameGrabber.stop(FFmpegFrameGrabber.java:551)
        at com.example.viet.myappdemo.VideoActivity.getFrame(VideoActivity.java:295)
        at com.example.viet.myappdemo.VideoActivity.access$100(VideoActivity.java:43)
        at com.example.viet.myappdemo.VideoActivity$2.run(VideoActivity.java:245)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:148)
        at android.app.ActivityThread.main(ActivityThread.java:5417)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
     Caused by: java.lang.ClassNotFoundException: Didn't find class "org.bytedeco.javacpp.avcodec" on path: DexPathList[[zip file "/data/app/com.example.viet.myappdemo-2/base.apk"],nativeLibraryDirectories=[/data/app/com.example.viet.myappdemo-2/lib/arm, /data/app/com.example.viet.myappdemo-2/base.apk!/lib/armeabi, /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 org.bytedeco.javacv.FFmpegFrameGrabber.release(FFmpegFrameGrabber.java:124) 
        at org.bytedeco.javacv.FFmpegFrameGrabber.stop(FFmpegFrameGrabber.java:551) 
        at com.example.viet.myappdemo.VideoActivity.getFrame(VideoActivity.java:295) 
        at com.example.viet.myappdemo.VideoActivity.access$100(VideoActivity.java:43) 
        at com.example.viet.myappdemo.VideoActivity$2.run(VideoActivity.java:245) 
        at android.os.Handler.handleCallback(Handler.java:739) 
        at android.os.Handler.dispatchMessage(Handler.java:95) 
        at android.os.Looper.loop(Looper.java:148) 
        at android.app.ActivityThread.main(ActivityThread.java:5417) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
        Suppressed: java.lang.ClassNotFoundException: org.bytedeco.javacpp.avcodec
        at java.lang.Class.classForName(Native Method)
        at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
        at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
                ... 13 more
     Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available

I've tried to download these files:

• ffmpeg-3.0-1.2-20160319.155429-3.jar
• ffmpeg-3.0-1.2-20160319.155429-3-android-arm.jar
• ffmpeg-3.0-1.2-20160319.155429-3-android-x86.jar
• javacpp-1.2-20160402.142645-6.jar
• javacv-1.2-20160319.154745-3.jar

but the same issue happens. I've also tried to change targetSdkVersion 22 but it doesn't work.
I also do not have armeabi (or armeabi-v7a) folder in my project so maybe all the necessary .so files don't get copied into my project?
Am I missing something obvious here?

[saudet]

Are you sure this isn't an issue related to ProGuard?
https://github.com/bytedeco/javacv/wiki/Configuring-Proguard-for-JavaCV

[vxhviet]

Hi @saudet, my Android Studio do indeed comes with proguard version 4.7. I've followed the instruction in your provided link, however I still get the java.lang.UnsatisfiedLinkError.

I'm trying to follow the instruction in one of your suggestion to use ReLinker. The step is not very clear though. Should I put all the relevant jar file (ffmpeg-android-arm.jar, ffmpeg-android-x86.jar, javacpp.jar, javacv.jar) in the libs folder and make a call like:
ReLinker.loadLibrary(context, “ffmpeg-android-arm.jar”)

I've tried it but it didn't work. Is there away to make it work with gradle instead?

[saudet]

Sure, it works with Gradle, see #133, for example, but there are also unresolved issues with that. I guess I'll just mark this as a duplicate of that issue actually. Please continue the discussion there. Thanks!

[vxhviet]

Sorry, I didn't realize saudet closed my issue just minutes before my submit so I'll just continue there instead.