Configuration steps for javacv on Eclipse running on windows 7 can be found in the link below.
http://opencvlover.blogspot.in/2012/04/javacv-setup-with-eclipse-on-windows-7.html
Instructions for importing video in javacv can be found in link below
http://opencvlover.blogspot.in/2012/05/importing-video-using-javacv.html
Accessing webcam using javacv is pretty much similar to importing video. We just have to set null parameter while specifying video path in deceleration of OpenCVFramegrabber. Also we have to flip output from webcam horizontally to get it like mirror.
Following is the code snippet which uses OpenCVFrameGrabber to capture from webcam.
http://opencvlover.blogspot.in/2012/04/javacv-setup-with-eclipse-on-windows-7.html
Instructions for importing video in javacv can be found in link below
http://opencvlover.blogspot.in/2012/05/importing-video-using-javacv.html
Accessing webcam using javacv is pretty much similar to importing video. We just have to set null parameter while specifying video path in deceleration of OpenCVFramegrabber. Also we have to flip output from webcam horizontally to get it like mirror.
Following is the code snippet which uses OpenCVFrameGrabber to capture from webcam.
errors dude
ReplyDeleteERROR: SampleCB() - buffer sizes do not match
ERROR: SampleCB() - buffer sizes do not match
ERROR: SampleCB() - buffer sizes do not match
ERROR: SampleCB() - buffer sizes do not match
repeated and when i close below comes
ERROR: S#
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x682f17bc, pid=1448, tid=5664
#
# JRE version: 7.0_17-b02
# Java VM: Java HotSpot(TM) Client VM (23.7-b01 mixed mode, sharing windows-x86 )
# Problematic frame:
# C [quartz.dll+0x117bc] DllGetClassObject+0x8558
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# An error report file with more information is saved as:
# F:\eclipse workspace\webcam\hs_err_pid1448.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp
#
I got:
ReplyDeleteException in thread "main" java.lang.ExceptionInInitializerError
at com.googlecode.javacv.OpenCVFrameGrabber.start(OpenCVFrameGrabber.java:174)
at Webcam.main(Webcam.java:22)
Caused by: java.lang.IllegalStateException: Can't overwrite cause
at java.lang.Throwable.initCause(Throwable.java:456)
at com.googlecode.javacpp.Loader.load(Loader.java:581)
at com.googlecode.javacpp.Loader.load(Loader.java:532)
at com.googlecode.javacv.cpp.opencv_highgui.(opencv_highgui.java:79)
... 2 more
this code is correct but i want to increase the resolution of 1080X640 how can i change this ..please help me .............
ReplyDeleteThis code uses default resolution of image provided by your camera. If you want to set resolution manually then just set desired resolution in function canvas.setCanvasSize()
DeleteIt's really an informative and well described post. I appreciate your topic for blogging. Thanks for sharing such a use ful post.
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how to make .jar file with this code? I tried, but when i double click the .jar file it didn't open and not showing the video from webcam.
ReplyDeleteVIDIOC_QUERYMENU: Invalid argument
ReplyDeleteVIDIOC_QUERYMENU: Invalid argument
VIDIOC_QUERYMENU: Invalid argument
HIGHGUI ERROR: V4L: Property (16) not supported by device
how you are converting Frame to an IplImage in line 30, as u r grabbing a frame and saving it to IplImage
ReplyDeleteI seem to have this same issue. I have read the code from so many other forums and they all seem to have a similar approach. I am unable to save the grabbed image into an IplImage though.
DeleteIf you get the error "Frame cannot be converted to IplImage " use the OpenCVFrameConverter as shown in this code:
Deletehttps://github.com/bytedeco/javacv#sample-usage
java.lang.NoClassDefFoundError: com/googlecode/javacpp/Pointer
ReplyDeleteat java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
at java.lang.Class.getMethod0(Class.java:3018)
at java.lang.Class.getMethod(Class.java:1784)
at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: com.googlecode.javacpp.Pointer
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 19 more
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" C:\Users\Aviral\AppData\Local\NetBeans\Cache\8.1\executor-snippets\run.xml:53: Java returned: 1
BUILD FAILED (total time: 0 seconds)
m getting this error
my program is working correctly except when i open webcam I'm unable to see myself it all blank white but yet still it capturing the image
ReplyDeleteNice!
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how to mirror the camera ?
ReplyDeleteIt's working but when deployed at server it doesn't use client webcam
ReplyDeleteI really enjoy the article.Thanks Again. Fantastic.
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