Hi,
I have a problem when I'm trying to capture video from my IP-camera, mentioned in the topic.
I have tried to solve it using the tips and examples displayed [here](http://stackoverflow.com/questions/20610479/unable-to-get-video-feed-from-d-link-dcs-932l-using-opencv), as well as the advice given [here](http://stackoverflow.com/questions/22202666/opencv-videocapture-d-link-dcs-930l), but nothing seems to work.
My code, originally taken from [this](http://stackoverflow.com/questions/26535645/ip-camera-with-opencv-in-java) example, looks as follows.
import java.io.IOException;
import javax.swing.JFrame;
import org.opencv.core.Core;
import org.opencv.videoio.VideoCapture;
public class OpenCVTest {
public OpenCVTest() {
// TODO Auto-generated constructor stub
}
/**
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException {
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
VideoCapture ip_camera = new VideoCapture("http://username:password@ip-address/video.cgi?x.mjpeg");
//ip_camera.open("http://username:password@ip-address/video.cgi?x.mjpeg");
// VideoCapture camera = new VideoCapture(0);
if (ip_camera.isOpened()) {
System.out.println("Video is captured");
} else {
System.out.println("");
}
VideoCamera cam = new VideoCamera(ip_camera);
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(cam);
frame.setSize(800, 800);
frame.setVisible(true);
while (ip_camera.isOpened()) {
cam.repaint();
}
}
}
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.awt.image.DataBufferByte;
import javax.swing.JPanel;
import org.opencv.core.Mat;
import org.opencv.imgproc.Imgproc;
import org.opencv.videoio.VideoCapture;
@SuppressWarnings("serial")
public class VideoCamera extends JPanel {
VideoCapture camera;
public VideoCamera(VideoCapture cam) {
camera = cam;
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
}
public BufferedImage Mat2BufferedImage(Mat m) {
int type = BufferedImage.TYPE_BYTE_GRAY;
if (m.channels() > 1) {
type = BufferedImage.TYPE_3BYTE_BGR;
}
int bufferSize = m.channels() * m.cols() * m.rows();
byte[] b = new byte[bufferSize];
m.get(0, 0, b); // get all the pixels
BufferedImage img = new BufferedImage(m.cols(), m.rows(), type);
final byte[] targetPixels = ((DataBufferByte) img.getRaster().getDataBuffer()).getData();
System.arraycopy(b, 0, targetPixels, 0, b.length);
return img;
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
Mat mat = new Mat();
if (camera.read(mat)) {
System.out.print("IMAGE");
}
BufferedImage image = Mat2BufferedImage(mat);
// Mat gray = turnGray(mat);
// MatOfRect objects = new MatOfRect();
// CascadeClassifier cas = new CascadeClassifier();
// cas.detectMultiScale(gray,objects);
// Mat thresh = threash( gray);
// BufferedImage image = Mat2BufferedImage(thresh);
g.drawImage(image, 10, 10, image.getWidth(), image.getHeight(), null);
}
public Mat turnGray(Mat img)
{
Mat mat1 = new Mat();
Imgproc.cvtColor(img, mat1, Imgproc.COLOR_RGB2GRAY);
return mat1;
}
public Mat threash(Mat img) {
Mat threshed = new Mat();
int SENSITIVITY_VALUE = 100;
Imgproc.threshold(img, threshed, SENSITIVITY_VALUE, 255, Imgproc.THRESH_BINARY);
return threshed;
}
}
It is worth mentioning that when I try the URL passed to the VideoCapture object in my browser, I get access to the camera feed.
My error message looks like this.
Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Width (0) and height (0) must be > 0
at java.awt.image.SampleModel.(SampleModel.java:126)
at java.awt.image.ComponentSampleModel.(ComponentSampleModel.java:146)
at java.awt.image.PixelInterleavedSampleModel.(PixelInterleavedSampleModel.java:87)
at java.awt.image.Raster.createInterleavedRaster(Raster.java:641)
at java.awt.image.Raster.createInterleavedRaster(Raster.java:278)
at java.awt.image.Raster.createInterleavedRaster(Raster.java:212)
at java.awt.image.ComponentColorModel.createCompatibleWritableRaster(ComponentColorModel.java:2825)
at java.awt.image.BufferedImage.(BufferedImage.java:428)
at VideoCamera.Mat2BufferedImage(VideoCamera.java:37)
at VideoCamera.paintComponent(VideoCamera.java:53)
at javax.swing.JComponent.paint(JComponent.java:1053)
at javax.swing.JComponent.paintChildren(JComponent.java:886)
at javax.swing.JComponent.paint(JComponent.java:1062)
at javax.swing.JComponent.paintChildren(JComponent.java:886)
at javax.swing.JComponent.paint(JComponent.java:1062)
at javax.swing.JLayeredPane.paint(JLayeredPane.java:586)
at javax.swing.JComponent.paintChildren(JComponent.java:886)
at javax.swing.JComponent.paintToOffscreen(JComponent.java:5230)
at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1572)
at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1495)
at javax.swing.RepaintManager.paint(RepaintManager.java:1265)
at javax.swing.JComponent.paint(JComponent.java:1039)
at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:39)
at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:79)
at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:116)
at java.awt.Container.paint(Container.java:1973)
at java.awt.Window.paint(Window.java:3901)
at javax.swing.RepaintManager$4.run(RepaintManager.java:835)
at javax.swing.RepaintManager$4.run(RepaintManager.java:807)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:807)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:782)
at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:731)
at javax.swing.RepaintManager.access$1300(RepaintManager.java:64)
at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1720)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:744)
at java.awt.EventQueue.access$400(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:697)
at java.awt.EventQueue$3.run(EventQueue.java:691)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:714)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
I am sorry the post got so long, but I figured it is better to as meticulous as possible.
/S
↧
