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sarxos / webcam-capture

The goal of this project is to allow integrated or USB-connected webcams to be accessed directly from Java. Using provided libraries users are able to read camera images and detect motion. Main project consist of several sub projects - the root one, which contains required classes, build-in webcam driver compatible with Windows, Linux and Mac OS, which can stream images as fast as your camera can serve them (up to 50 FPS). Main project can be used standalone, but user is able to replace build-in driver with different one - such as OpenIMAJ, GStreamer, V4L4j, JMF, LTI-CIVIL, FMJ, etc.
http://webcam-capture.sarxos.pl
MIT License
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Problem initializing OpenIMAJGrabber on Intel Edison board running Yocto Linux #322

Open Kurohasan opened 9 years ago

Kurohasan commented 9 years ago

Hello,

I work with the intel edison module (on a arduino board) and try to get access to my webcam, which is connected via the usb type A port. Yocto haven't any problems with detecting the cam (i execute lsusb -t, and the device appear in the list), but when I execute my application I get strange error messages. I found an similar Issue here, but it seems that my english isn't that good to understand the instructions ...

Here is the error: 

SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/home/root/programms/Client/lib/logback-classic-1.1.2.jar!/org/sl                                                                                                                                          f4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/home/root/programms/Client/lib/slf4j-simple-1.7.10.jar!/org/slf4                                                                                                                                          j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]
10:02:19.352 [main] INFO  com.github.sarxos.webcam.Webcam - WebcamDefaultDriver capture driver will                                                                                                                                           be used
10:02:19.503 [webcam-discovery-service] DEBUG c.g.s.w.d.b.WebcamDefaultDriver - Searching devices
Java HotSpot(TM) Client VM warning: You have loaded library /tmp/BridJExtractedLibraries23719068806                                                                                                                                          49318115/libbridj.so which might have disabled stack guard. The VM will try to fix the stack guard                                                                                                                                           now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z                                                                                                                                           noexecstack'.
# BridJ: dlopen error when loading /tmp/BridJExtractedLibraries2371906880649318115/OpenIMAJGrabber.                                                                                                                                          so : libv4l2.so.0: cannot open shared object file: No such file or directory
# BridJ: dlopen error when loading /tmp/BridJExtractedLibraries2371906880649318115/OpenIMAJGrabber.                                                                                                                                          so : libv4l2.so.0: cannot open shared object file: No such file or directory
# BridJ: dlopen error when loading /tmp/BridJExtractedLibraries2371906880649318115/OpenIMAJGrabber.                                                                                                                                          so : libv4l2.so.0: cannot open shared object file: No such file or directory
# BridJ: dlopen error when loading /tmp/BridJExtractedLibraries2371906880649318115/OpenIMAJGrabber.                                                                                                                                          so : libv4l2.so.0: cannot open shared object file: No such file or directory
# BridJ: dlopen error when loading /tmp/BridJExtractedLibraries2371906880649318115/OpenIMAJGrabber.                                                                                                                                          so : libv4l2.so.0: cannot open shared object file: No such file or directory
# BridJ: dlopen error when loading /tmp/BridJExtractedLibraries2371906880649318115/OpenIMAJGrabber.                                                                                                                                          so : libv4l2.so.0: cannot open shared object file: No such file or directory
# BridJ: dlopen error when loading /tmp/BridJExtractedLibraries2371906880649318115/OpenIMAJGrabber.                                                                                                                                          so : libv4l2.so.0: cannot open shared object file: No such file or directory
# BridJ: dlopen error when loading /tmp/BridJExtractedLibraries2371906880649318115/OpenIMAJGrabber.                                                                                                                                          so : libv4l2.so.0: cannot open shared object file: No such file or directory
# BridJ: dlopen error when loading /tmp/BridJExtractedLibraries2371906880649318115/OpenIMAJGrabber.                                                                                                                                          so : libv4l2.so.0: cannot open shared object file: No such file or directory
# BridJ: dlopen error when loading /tmp/BridJExtractedLibraries2371906880649318115/OpenIMAJGrabber.                                                                                                                                          so : libv4l2.so.0: cannot open shared object file: No such file or directory
# BridJ: dlopen error when loading /tmp/BridJExtractedLibraries2371906880649318115/OpenIMAJGrabber.                                                                                                                                          so : libv4l2.so.0: cannot open shared object file: No such file or directory
java.lang.RuntimeException: Library 'OpenIMAJGrabber' was not loaded successfully from file '/tmp/B                                                                                                                                          ridJExtractedLibraries2371906880649318115/OpenIMAJGrabber.so'
        at org.bridj.BridJ.getNativeLibrary(BridJ.java:922)
        at org.bridj.BridJ.getNativeLibrary(BridJ.java:901)
        at org.bridj.BridJ.getNativeLibrary(BridJ.java:513)
        at org.bridj.cpp.CPPRuntime.newCPPInstance(CPPRuntime.java:627)
        at org.bridj.cpp.CPPRuntime$CPPTypeInfo.initialize(CPPRuntime.java:828)
        at org.bridj.cpp.CPPRuntime$CPPTypeInfo.initialize(CPPRuntime.java:755)
        at org.bridj.CRuntime$CTypeInfo.initialize(CRuntime.java:209)
        at org.bridj.BridJ.initialize(BridJ.java:970)
        at org.bridj.NativeObject.<init>(NativeObject.java:23)
        at org.bridj.StructObject.<init>(StructObject.java:14)
        at org.bridj.cpp.CPPObject.<init>(CPPObject.java:27)
        at com.github.sarxos.webcam.ds.buildin.natives.OpenIMAJGrabber.<init>(OpenIMAJGrabber.java:                                                                                                                                          64)
        at com.github.sarxos.webcam.ds.buildin.WebcamDefaultDriver$WebcamNewGrabberTask.handle(Webc                                                                                                                                          amDefaultDriver.java:56)
        at com.github.sarxos.webcam.WebcamProcessor$AtomicProcessor.run(WebcamProcessor.java:81)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Exception in thread "main" com.github.sarxos.webcam.WebcamException: java.util.concurrent.Execution                                                                                                                                          Exception: com.github.sarxos.webcam.WebcamException: Cannot execute task
        at com.github.sarxos.webcam.WebcamDiscoveryService.getWebcams(WebcamDiscoveryService.java:1                                                                                                                                          24)
        at com.github.sarxos.webcam.Webcam.getWebcams(Webcam.java:816)
        at com.github.sarxos.webcam.Webcam.getWebcams(Webcam.java:789)
        at com.github.sarxos.webcam.Webcam.getWebcams(Webcam.java:768)
        at robotclient.RobotClient.main(RobotClient.java:24)
Caused by: java.util.concurrent.ExecutionException: com.github.sarxos.webcam.WebcamException: Canno                                                                                                                                          t execute task
        at java.util.concurrent.FutureTask.report(FutureTask.java:122)
        at java.util.concurrent.FutureTask.get(FutureTask.java:192)
        at com.github.sarxos.webcam.WebcamDiscoveryService.getWebcams(WebcamDiscoveryService.java:1                                                                                                                                          16)
        ... 4 more
Caused by: com.github.sarxos.webcam.WebcamException: Cannot execute task
        at com.github.sarxos.webcam.WebcamProcessor$AtomicProcessor.process(WebcamProcessor.java:72                                                                                                                                          )
        at com.github.sarxos.webcam.WebcamProcessor.process(WebcamProcessor.java:140)
        at com.github.sarxos.webcam.WebcamTask.process(WebcamTask.java:46)
        at com.github.sarxos.webcam.ds.buildin.WebcamDefaultDriver$WebcamNewGrabberTask.newGrabber(                                                                                                                                          WebcamDefaultDriver.java:46)
        at com.github.sarxos.webcam.ds.buildin.WebcamDefaultDriver.getDevices(WebcamDefaultDriver.j                                                                                                                                          ava:118)
        at com.github.sarxos.webcam.WebcamDiscoveryService$WebcamsDiscovery.call(WebcamDiscoverySer                                                                                                                                          vice.java:36)
        at com.github.sarxos.webcam.WebcamDiscoveryService$WebcamsDiscovery.call(WebcamDiscoverySer                                                                                                                                          vice.java:26)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.RuntimeException: Failed to allocate new instance of type class com.github.sar                                                                                                                                          xos.webcam.ds.buildin.natives.OpenIMAJGrabber
        at org.bridj.cpp.CPPRuntime.newCPPInstance(CPPRuntime.java:674)
        at org.bridj.cpp.CPPRuntime$CPPTypeInfo.initialize(CPPRuntime.java:828)
        at org.bridj.cpp.CPPRuntime$CPPTypeInfo.initialize(CPPRuntime.java:755)
        at org.bridj.CRuntime$CTypeInfo.initialize(CRuntime.java:209)
        at org.bridj.BridJ.initialize(BridJ.java:970)
        at org.bridj.NativeObject.<init>(NativeObject.java:23)
        at org.bridj.StructObject.<init>(StructObject.java:14)
        at org.bridj.cpp.CPPObject.<init>(CPPObject.java:27)
        at com.github.sarxos.webcam.ds.buildin.natives.OpenIMAJGrabber.<init>(OpenIMAJGrabber.java:                                                                                                                                          64)
        at com.github.sarxos.webcam.ds.buildin.WebcamDefaultDriver$WebcamNewGrabberTask.handle(Webc                                                                                                                                          amDefaultDriver.java:56)
        at com.github.sarxos.webcam.WebcamProcessor$AtomicProcessor.run(WebcamProcessor.java:81)
        ... 3 more
Caused by: java.lang.RuntimeException: Library 'OpenIMAJGrabber' was not loaded successfully from f                                                                                                                                          ile '/tmp/BridJExtractedLibraries2371906880649318115/OpenIMAJGrabber.so'
        at org.bridj.BridJ.getNativeLibrary(BridJ.java:922)
        at org.bridj.BridJ.getNativeLibrary(BridJ.java:901)
        at org.bridj.BridJ.getNativeLibrary(BridJ.java:513)
        at org.bridj.cpp.CPPRuntime.newCPPInstance(CPPRuntime.java:627)
        ... 13 more

Is there anyone who can help me? Please excuse my bad english - I hope that I described the problem in an understandable way.

sarxos commented 9 years ago

Hi @Kurohasan,

It seems like you are missing libv4l2 installed on the Yocto:

# BridJ: dlopen error when loading 
/tmp/BridJExtractedLibraries2371906880649318115/OpenIMAJGrabber.so : 
libv4l2.so.0: cannot open shared object file: No such file or directory

Please note that community confirmed OpenIMAJGrabber to have problems on ARM architectures and therefore it may not work properly even when you install libv4l2 (but still it's worth to try). If you confirm it not working on Edison board we can try to build custom driver on top of driver-v4l4j which runs much better on ARM.

Kurohasan commented 9 years ago

Thanks for your reply sarxos,

"It seems like you are missing libv4l2 installed on the Yocto:"

Yes - a few looks later I was able to figure it out. I flashed Ubilinux to install the libv4l-dev libraries (I was not able to get it on Yocto) - perhaps I will also install the JRE on the edison tomorrow to test my application.

Sorry for my bad english again.