Issue with Maven and OS X UnsatisfiedLinkError org.bytedeco.javacpp.opencv_core

[hfjn]

Hi. I'm trying to use JavaCV for an easy Jetty Server. It builds just fine, but when initializing the Class that uses JavaCV the first time the whole thing crashes with:

java.lang.UnsatisfiedLinkError: no jniopencv_core in java.library.path at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1764) at java.lang.Runtime.loadLibrary0(Runtime.java:823) at java.lang.System.loadLibrary(System.java:1044) at org.bytedeco.javacpp.Loader.loadLibrary(Loader.java:535) at org.bytedeco.javacpp.Loader.load(Loader.java:410) at org.bytedeco.javacpp.Loader.load(Loader.java:353) at org.bytedeco.javacpp.opencv_core.<clinit>(opencv_core.java:10) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:249) at org.bytedeco.javacpp.Loader.load(Loader.java:385) at org.bytedeco.javacpp.Loader.load(Loader.java:353) at org.bytedeco.javacpp.opencv_core$Algorithm.<clinit>(opencv_core.java:8797) at uos.jhoffjann.server.logic.OCV.<init>(OCV.java:22)

I got the JavaCV libraries as described here. Am I just missing the platform.dependeciespart? I wasn't able to find a Maven property which is called like that, so I couldn't activate it.

This is the relevant part in my pom.xml:

<dependency>
        <groupId>org.bytedeco</groupId>
        <artifactId>javacpp</artifactId>
        <version>0.9</version>
    </dependency>
     <dependency>
        <groupId>org.bytedeco.javacpp-presets</groupId>
        <artifactId>opencv</artifactId>
        <version>2.4.9-0.9</version>
    </dependency>
    <dependency>
        <groupId>org.bytedeco.javacpp-presets</groupId>
        <artifactId>ffmpeg</artifactId>
        <version>2.3-0.9</version>
    </dependency>
    <dependency>
        <groupId>org.bytedeco.javacpp-presets</groupId>
        <artifactId>flycapture</artifactId>
        <version>2.6.3.4-0.9</version>
    </dependency>
    <dependency>
        <groupId>org.bytedeco.javacpp-presets</groupId>
        <artifactId>libdc1394</artifactId>
        <version>2.2.2-0.9</version>
    </dependency>
    <dependency>
        <groupId>org.bytedeco.javacpp-presets</groupId>
        <artifactId>libfreenect</artifactId>
        <version>0.5-0.9</version>
    </dependency>
    <dependency>
        <groupId>org.bytedeco.javacpp-presets</groupId>
        <artifactId>videoinput</artifactId>
        <version>0.200-0.9</version>
    </dependency>
    <dependency>
        <groupId>org.bytedeco.javacpp-presets</groupId>
        <artifactId>artoolkitplus</artifactId>
        <version>2.3.0-0.9</version>
    </dependency>
    <dependency>
        <groupId>org.bytedeco.javacpp-presets</groupId>
        <artifactId>flandmark</artifactId>
        <version>1.07-0.9</version>
    </dependency>
    <dependency>
        <groupId>org.bytedeco.javacpp-presets</groupId>
        <artifactId>fftw</artifactId>
        <version>3.3.4-0.9</version>
    </dependency>
    <dependency>
        <groupId>org.bytedeco.javacpp-presets</groupId>
        <artifactId>gsl</artifactId>
        <version>1.16-0.9</version>
    </dependency>
    <dependency>
        <groupId>org.bytedeco.javacpp-presets</groupId>
        <artifactId>llvm</artifactId>
        <version>3.4.2-0.9</version>
    </dependency>
    <dependency>
        <groupId>org.bytedeco.javacpp-presets</groupId>
        <artifactId>leptonica</artifactId>
        <version>1.71-0.9</version>
    </dependency>
    <dependency>
        <groupId>org.bytedeco.javacpp-presets</groupId>
        <artifactId>tesseract</artifactId>
        <version>3.03-rc1-0.9</version>
    </dependency>
    <dependency>
        <groupId>org.bytedeco</groupId>
        <artifactId>javacv</artifactId>
        <version>0.9</version>
    </dependency>

`
I would be extremely glad for any help.

[saudet]

Does it work if you set the platform.dependencies system property as shown on the page below?
https://github.com/bytedeco/javacpp-presets/tree/master/opencv#sample-usage

[hfjn]

Thanks for your answer. Unfortunately I get the same error. I started my application with:
mvn jetty:run -Dplatform.dependencies
It downloaded a ton of new jars but when I access the function which should use JavaCV it still crashes with:
java.lang.UnsatisfiedLinkError: no jniopencv_core in java.library.path
Further down the stack trace I can also find this possible interesting part:
aused by: java.lang.UnsatisfiedLinkError: /private/var/folders/m2/4b8pqw2j5lndmnjrqf7ncnbc0000gn/T/javacpp1415322937425337000/libjniopencv_core.dylib: Library not loaded: @rpath/libopencv_core.2.4.dylib Referenced from: /private/var/folders/m2/4b8pqw2j5lndmnjrqf7ncnbc0000gn/T/javacpp1415322937425337000/libjniopencv_core.dylib Reason: no suitable image found. Did find: /private/var/folders/m2/4b8pqw2j5lndmnjrqf7ncnbc0000gn/T/javacpp1415322937425337000/./libopencv_core.2.4.dylib: malformed mach-o image: load command #12 length (0) too small in /private/var/folders/m2/4b8pqw2j5lndmnjrqf7ncnbc0000gn/T/javacpp1415322937425337000/./libopencv_core.2.4.dylib

[saudet]

I see, we've got a duplicate issue for that here: bytedeco/javacpp#6

[hfjn]

Oh. That sounds indeed oddly familiar. Is there an easy way to use those new binaries with maven? Or do I need to create a local repository for them? Thanks for helping!

[saudet]

It's a normal snapshot repository, so we can add it to the pom.xml file, but I haven't taken the time to make sure all the pom.xml files are cooperating well here, so it might be easier to build what you need locally yes.

[hfjn]

Okay. I tried to use the binaries you posted here and maybe I'm just not that intelligent today, but the only useable .jar I could find was ffmpeg-2.4.2-0.9.1-20141101.094631-4-macosx-x86_64.jar. I would be extremely thankful if you could elaborate what I need to do with the javacpp-folder you posted. I just switched from OpenCV for Java to your library and I have the feeling that I missed something essential when setting everything up.

Let me explain what I did. Maybe it's obvious what I forgot to do. (Code for context):

1. Added the dependencies (now with the ffmpeg.jar from the local repo):

   <dependency>
       <groupId>org.bytedeco</groupId>
       <artifactId>javacpp</artifactId>
       <version>0.9</version>
   </dependency>
   
   <dependency>
       <groupId>org.bytedeco.javacpp-presets</groupId>
       <artifactId>opencv</artifactId>
       <version>2.4.9-0.9</version>
   </dependency>
   
   <dependency>
       <groupId>org.bytedeco.javacpp-presets</groupId>
       <artifactId>ffmpeg</artifactId>
       <version>2.4.2-0.9.1-SNAPSHOT</version>
   </dependency>
   
   <dependency>
       <groupId>org.bytedeco</groupId>
       <artifactId>javacv</artifactId>
       <version>0.9</version>
   </dependency>
   

2. added this plugin.
   <plugin> <groupId>org.bytedeco</groupId> <artifactId>javacpp</artifactId> <version>0.9</version> </plugin>

3. $ mvn clean install

4. $ mvn jetty:run -Dplatform.dependencies

Thanks in advance!

[saudet]

Like I said, it's probably easier to just run cppbuild.sh install and mvn install to build everything locally from source. I didn't test anything of the snapshots, and it's really hard to get those right.

[hfjn]

Many thanks. I redid everything and built the whole javacpp-presets as you told me and it just worked. Now I can concentrate on fixing the real problems. Thank you again!

[gaurav-chawla]

Add opencv-os.jar in your class path.
For Mac:
Copy opencv-macosx-x86_64.jar inside /System/Library/Java/Extensions/

[SaleemKhair]

@jhoffjann can you please provide what exactly you did,
I am facing the same issue
thanks.

[hfjn]

@SaleemKhair I ran into other problems later in the project. I eventually switched to OpenCV and got my project running with that. Back then I did it like that: http://aufeinwort.org/2014/10/get-opencv-up-and-running-with-intellij-and-mac-os-x/

[namannigam-zz]

@hfjn The last link seems to be broken. We want to switch to using openCv as well, jsut curious to see what changes did you bring.

[hfjn]

@namannigam You can find it here