libjniopencv_core.so cannot locate symbol

[cangelis]

FFMpegGrabber.start doesn't work because of the error. Here is the full stacktrace:

12-11 03:48:11.558: E/art(28044): dlopen("/data/app/co.foreight.app-2/lib/arm/libjniopencv_core.so", RTLD_LAZY) failed: dlopen failed: cannot locate symbol "_ZN2cv11seqPopMultiEP5CvSeqPvii" referenced by "libjniopencv_core.so"...
12-11 03:48:11.558: W/System.err(28044): java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "_ZN2cv11seqPopMultiEP5CvSeqPvii" referenced by "libjniopencv_core.so"...
12-11 03:48:11.558: W/System.err(28044):    at java.lang.Runtime.loadLibrary(Runtime.java:371)
12-11 03:48:11.558: W/System.err(28044):    at java.lang.System.loadLibrary(System.java:989)
12-11 03:48:11.558: W/System.err(28044):    at org.bytedeco.javacpp.Loader.loadLibrary(Loader.java:535)
12-11 03:48:11.558: W/System.err(28044):    at org.bytedeco.javacpp.Loader.load(Loader.java:410)
12-11 03:48:11.558: W/System.err(28044):    at org.bytedeco.javacpp.Loader.load(Loader.java:353)
12-11 03:48:11.558: W/System.err(28044):    at org.bytedeco.javacpp.opencv_core.<clinit>(opencv_core.java:10)
12-11 03:48:11.558: W/System.err(28044):    at java.lang.Class.classForName(Native Method)
12-11 03:48:11.558: W/System.err(28044):    at java.lang.Class.forName(Class.java:308)
12-11 03:48:11.558: W/System.err(28044):    at org.bytedeco.javacpp.Loader.load(Loader.java:385)
12-11 03:48:11.559: W/System.err(28044):    at org.bytedeco.javacpp.Loader.load(Loader.java:353)
12-11 03:48:11.559: W/System.err(28044):    at org.bytedeco.javacpp.helper.opencv_core$AbstractArray.<clinit>(opencv_core.java:126)
12-11 03:48:11.559: W/System.err(28044):    at org.bytedeco.javacv.FFmpegFrameGrabber.startUnsafe(FFmpegFrameGrabber.java:463)
12-11 03:48:11.559: W/System.err(28044):    at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:340)
12-11 03:48:11.559: W/System.err(28044):    at co.foreight.plugin.VideoPlugin.handle(VideoPlugin.java:57)
12-11 03:48:11.559: W/System.err(28044):    at co.foreight.plugin.VideoPlugin.execute(VideoPlugin.java:30)
12-11 03:48:11.559: W/System.err(28044):    at org.apache.cordova.CordovaPlugin.execute(CordovaPlugin.java:84)
12-11 03:48:11.559: W/System.err(28044):    at org.apache.cordova.PluginManager.exec(PluginManager.java:147)
12-11 03:48:11.559: W/System.err(28044):    at org.apache.cordova.CordovaBridge.jsExec(CordovaBridge.java:59)
12-11 03:48:11.559: W/System.err(28044):    at org.apache.cordova.ExposedJsApi.exec(ExposedJsApi.java:40)
12-11 03:48:11.559: W/System.err(28044):    at com.android.org.chromium.base.SystemMessageHandler.nativeDoRunLoopOnce(Native Method)
12-11 03:48:11.559: W/System.err(28044):    at com.android.org.chromium.base.SystemMessageHandler.handleMessage(SystemMessageHandler.java:28)
12-11 03:48:11.559: W/System.err(28044):    at android.os.Handler.dispatchMessage(Handler.java:102)
12-11 03:48:11.559: W/System.err(28044):    at android.os.Looper.loop(Looper.java:135)
12-11 03:48:11.559: W/System.err(28044):    at android.os.HandlerThread.run(HandlerThread.java:61)
12-11 03:48:11.559: W/System.err(28044): Caused by: java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/co.foreight.app-2/base.apk"],nativeLibraryDirectories=[/data/app/co.foreight.app-2/lib/arm, /vendor/lib, /system/lib]]] couldn't find "libgnustl_static.so"
12-11 03:48:11.559: W/System.err(28044):    at java.lang.Runtime.loadLibrary(Runtime.java:366)
12-11 03:48:11.559: W/System.err(28044):    at java.lang.System.loadLibrary(System.java:989)
12-11 03:48:11.559: W/System.err(28044):    at org.bytedeco.javacpp.Loader.loadLibrary(Loader.java:535)
12-11 03:48:11.559: W/System.err(28044):    at org.bytedeco.javacpp.Loader.load(Loader.java:401)

Looks like it can not find libgnustl_static.so but I have no idea what to do.

Thanks

[saudet]

The "caused by" bit is just a guess and in this case that's not what causes the error. That symbol is in fact not defined by OpenCV, so we need to ignore it. I've pushed some modifications (link above) that fixes that. Thanks for reporting!

[cangelis]

I compiled the opencv again and it works great. Thank you very much!

[jarvischung]

About this case:
If I import Sugar DB lib and init the db lib.
The JavaCV doesn't use, I just init db then get the crash log as below:
Caused by: java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/xxx.xxx.xxx-2/base.apk"],nativeLibraryDirectories=[/data/app/xxx.xxx.app-2/lib/arm, /vendor/lib, /system/lib]]] couldn't find "libgnustl_static.so"

Thanks.

[saudet]

@jarvischung This is probably caused by ProGuard. Details here: #79 (comment)