UnsatisfiedLinkError: no jniopencv_ximgproc

[kwatters]

I've been working on an image segmentation example. The example uses ximgproc. I'm on windows 10, 64 bit, using java8.
This is javacv 1.5.3

In particular i'm trying to do the following

import static org.bytedeco.opencv.global.opencv_ximgproc.createSelectiveSearchSegmentation;
followed by:
Loader.load(opencv_ximgproc.class);

This gives me an exception:

`java.lang.UnsatisfiedLinkError: no jniopencv_ximgproc in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1867)
at java.lang.Runtime.loadLibrary0(Runtime.java:870)
at java.lang.System.loadLibrary(System.java:1122)
at org.bytedeco.javacpp.Loader.loadLibrary(Loader.java:1631)
at org.bytedeco.javacpp.Loader.load(Loader.java:1265)
at org.bytedeco.javacpp.Loader.load(Loader.java:1109)
at org.bytedeco.opencv.global.opencv_ximgproc.(opencv_ximgproc.java:31)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at org.bytedeco.javacpp.Loader.load(Loader.java:1176)
at org.bytedeco.javacpp.Loader.load(Loader.java:1125)
at org.myrobotlab.opencv.OpenCVFilterImageSegmenterTest.setup(OpenCVFilterImageSegmenterTest.java:21)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:89)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:209)
Caused by: java.lang.UnsatisfiedLinkError: C:\Users\kwatters.javacpp\cache\opencv-4.3.0-1.5.3-windows-x86_64.jar\org\bytedeco\opencv\windows-x86_64\jniopencv_ximgproc.dll: Can't find dependent libraries
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1941)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1824)
at java.lang.Runtime.load0(Runtime.java:809)
at java.lang.System.load(System.java:1086)
at org.bytedeco.javacpp.Loader.loadLibrary(Loader.java:1581)
... 36 more

`

Other libraries load just fine... perhaps there is something with how jniopencv_ximgproc.dll is created? maybe i'm missing some other transient dependencies in my system classpath? I'll try to debug more and provide detail. The dll that it's referencing the the error message does exist on the filesystem. (i have also deleted my ~/.javacpp cache and saw the dll's get re-created when i ran it again.. )

[kwatters]

Ok.. so a little update.. interestingly, if I first load the "opencv_video.class" , then i am able to successfully run my code.

Loader.load(opencv_video.class); Loader.load(opencv_ximgproc.class);

It seems like, there is a dependency loading order that needs to occur, the opencv_video stuff needs to be loaded before using ximgproc. Curious if there's a better workaround or fix for this...

[saudet]

Duplicate of bytedeco/javacpp-presets#911