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B4J Question Web Camera?
- Thread starter vdudukov
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By the way, it would be nice if I make a new link in the section of classes and libraries? to expand more this class that accesses the functions of the api? @Erel
Edit 1: Well there it is:
https://www.b4x.com/android/forum/threads/class-webcam-capture-under-construction.53211/
Edit 1: Well there it is:
https://www.b4x.com/android/forum/threads/class-webcam-capture-under-construction.53211/
Last edited:
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I am trying to run the WebCamTest on my Raspberry . The program starts and then I get the following log after one or two seconds :
I have put the three .jars in the Library folder. "Check the image below and the attachment project in the entry #14" I do not understand what to do with the stuff mentionned in # 14.
What am I doing wrong?
Harry
B4X:
Program started.
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Java HotSpot(TM) Client VM warning:
You have loaded library /tmp/BridJExtractedLibraries4452529451130851871/bridj.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'.
java.lang.RuntimeException: Failed to initialize BridJ
at org.bridj.Platform.initLibrary(Platform.java:370)
at org.bridj.Platform.<clinit>(Platform.java:175)
at com.github.sarxos.webcam.ds.buildin.natives.OpenIMAJGrabber.<clinit>(OpenIMAJGrabber.java:59)
at com.github.sarxos.webcam.ds.buildin.WebcamDefaultDriver$WebcamNewGrabberTask.handle(WebcamDefaultDriver.java:56)
at com.github.sarxos.webcam.WebcamProcessor$AtomicProcessor.run(WebcamProcessor.java:81)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.UnsatisfiedLinkError: /tmp/BridJExtractedLibraries4452529451130851871/bridj.so: /tmp/BridJExtractedLibraries4452529451130851871/bridj.so: cannot open shared object file: No such file or directory
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1929)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1814)
at java.lang.Runtime.load0(Runtime.java:809)
at java.lang.System.load(System.java:1083)
at org.bridj.Platform.initLibrary(Platform.java:347)
... 7 more
main._justtotest (java line: 82)
java.lang.ClassCastException: java.lang.UnsatisfiedLinkError cannot be cast to java.lang.Exception
at anywheresoftware.b4a.BA.setLastException(BA.java:292)
at b4j.example.main._justtotest(main.java:82)
at b4j.example.main._appstart(main.java:52)
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:483)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:93)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:84)
at b4j.example.main.start(main.java:36)
at com.sun.javafx.application.LauncherImpl$8.run(LauncherImpl.java:837)
at com.sun.javafx.application.PlatformImpl$7.run(PlatformImpl.java:335)
at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:301)
at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:298)
at java.secu
rity.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl$6.run(PlatformImpl.java:298)
at com.sun.glass.ui.lens.LensApplication$RunnableEvent.dispatch(LensApplication.java:182)
at com.sun.glass.ui.lens.LensApplication._runLoop(LensApplication.java:860)
at com.sun.glass.ui.lens.LensApplication.access$1800(LensApplication.java:58)
at com.sun.glass.ui.lens.LensApplication$4.run(LensApplication.java:917)
at java.lang.Thread.run(Thread.java:744)I have put the three .jars in the Library folder. "Check the image below and the attachment project in the entry #14" I do not understand what to do with the stuff mentionned in # 14.
What am I doing wrong?
Harry
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http://apk-dl.com/camerafi-usb-camera-webcam/com.vaultmicro.camerafi
This above application works with external uvc based usb camera. Can you please provide the B4A code/lib.
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Hello, i got an error message when executing the program in debug mode:
Failed to load class org.slf4j.impl.StaticLoggerBinder
I could solve the issue by downloading: slf4j-nop.jar
from: http://mvnrepository.com/artifact/org.slf4j/slf4j-nop/1.7.21
and reference it as: #AdditionalJar : slf4j-nop-1.7.21
Thanks a lot for the great ideas here, now it's working even for me ;-)
Chris
Failed to load class org.slf4j.impl.StaticLoggerBinder
I could solve the issue by downloading: slf4j-nop.jar
from: http://mvnrepository.com/artifact/org.slf4j/slf4j-nop/1.7.21
and reference it as: #AdditionalJar : slf4j-nop-1.7.21
Thanks a lot for the great ideas here, now it's working even for me ;-)
Chris
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