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OpenCv IP Camera in Java

I am trying to get and display a video stream from an IP camera. I found some code examples here: http://answers.opencv.org/question/24012/reading-video-stream-from-ip-camera-in-opencv-java/

But this does not work for me. My code works when I use my internal webcam, but when I switch the camera to IP, it does not work. I have no idea why. Can someone please help me? Here is my code:

import java.awt.BorderLayout; import java.awt.Image; import java.awt.image.BufferedImage; import java.awt.image.DataBufferByte; import java.io.File; import java.io.IOException; import javax.imageio.ImageIO; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import org.opencv.core.Core; import org.opencv.core.CvType; import org.opencv.core.Mat; import org.opencv.highgui.VideoCapture; import org.opencv.imgproc.Imgproc; 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 camera = new VideoCapture("http://192.168.0.7/image.jpg"); VideoCapture camera = new VideoCapture(0); if (camera.isOpened()) { System.out.println("Video is captured"); } else { System.out.println(""); } videoCamera cam = new videoCamera(camera); JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(cam); frame.setSize(800,800); frame.setVisible(true); while(camera.isOpened()) { cam.repaint(); } } } import java.awt.Graphics; import java.awt.Point; import java.awt.image.BufferedImage; import java.awt.image.DataBufferByte; import java.util.ArrayList; import javax.swing.JFrame; import javax.swing.JPanel; import org.opencv.core.Core; import org.opencv.core.Mat; import org.opencv.core.MatOfRect; import org.opencv.core.Rect; import org.opencv.core.Scalar; import org.opencv.highgui.VideoCapture; import org.opencv.imgproc.Imgproc; import org.opencv.objdetect.CascadeClassifier; import org.opencv.core.*; @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; } }

Thanks for the help. I was able to use what you said to find the correct IP address (http://192.168.0.6/VIDEO.CGI) (yes, I know 7 became 6, its another camera) to get the video in my browser . but I still get the following error.

  Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Width (0) and height (0) must be > 0 at java.awt.image.SampleModel.<init>(Unknown Source) at java.awt.image.ComponentSampleModel.<init>(Unknown Source) at java.awt.image.PixelInterleavedSampleModel.<init>(Unknown Source) at java.awt.image.Raster.createInterleavedRaster(Unknown Source) at java.awt.image.Raster.createInterleavedRaster(Unknown Source) at java.awt.image.Raster.createInterleavedRaster(Unknown Source) at java.awt.image.ComponentColorModel.createCompatibleWritableRaster(Unknown Source) at java.awt.image.BufferedImage.<init>(Unknown Source) at videoCamera.Mat2BufferedImage(videoCamera.java:54) at videoCamera.paintComponent(videoCamera.java:74) at javax.swing.JComponent.paint(Unknown Source) at javax.swing.JComponent.paintChildren(Unknown Source) at javax.swing.JComponent.paint(Unknown Source) at javax.swing.JComponent.paintChildren(Unknown Source) at javax.swing.JComponent.paint(Unknown Source) at javax.swing.JLayeredPane.paint(Unknown Source) at javax.swing.JComponent.paintChildren(Unknown Source) at javax.swing.JComponent.paintToOffscreen(Unknown Source) at javax.swing.BufferStrategyPaintManager.paint(Unknown Source) at javax.swing.RepaintManager.paint(Unknown Source) at javax.swing.JComponent.paint(Unknown Source) at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source) at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source) at sun.awt.SunGraphicsCallback.runComponents(Unknown Source) at java.awt.Container.paint(Unknown Source) at java.awt.Window.paint(Unknown Source) at javax.swing.RepaintManager$3.run(Unknown Source) at javax.swing.RepaintManager$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source) at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source) at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source) at javax.swing.RepaintManager.access$1100(Unknown Source) at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source) at java.awt.event.InvocationEvent.dispatch(Unknown Source) at java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.awt.EventQueue.access$200(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source)

I think this is because VideoCapture is not capturing the frame correctly.

This is the camera I'm trying to use http://www.trendnet.com/products/proddetail.asp?prod=150_TV-IP100W-N

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2 answers

.jpg refers to a single image file, and .mpg provides access to the video stream. It is important to determine the IP and PORT used for the connection.

Depending on your device and the settings defined in the web interface of the camera, the URL will be different:

 VideoCapture camera = new VideoCapture("http://192.168.0.7:8080/?dummy=param.mjpg"); VideoCapture camera = new VideoCapture("http://192.168.0.7:8080/mjpeg.cgi"); VideoCapture camera = new VideoCapture("http://192.168.0.7:8080/mjpg/mjpeg.cgi"); VideoCapture camera = new VideoCapture("http://192.168.0.7:8080/video.mjpeg"); VideoCapture camera = new VideoCapture("http://192.168.0.7:8080/video.cgi?.mjpg");

When you access a valid URL through a browser, it should display the video stream. When you find an address that works, just pass it to the VideoCapture constructor. In these examples, I showed how to access the stream through HTTP, but RTSP is supported.

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After three to four weeks of hard work, I found a 100% solution for this.

First of all, you need to download the dfmpeg dll file Dynamically ie

System.loadLibrary("[NAME OF YOUR DLL FILE]") You can find the required dll file in **opencv/build/x64/vc11/bin** The name of the DLL in my case is "opencv_ffmpeg2413_64.dll" copy the default file to project and use

 System.loadLibrary("opencv_ffmpeg2413_64");//You May have different File Name Depending on the Version of OpenCV Installed on your Computer

Then you can just use

 VideoCapture ipcamera = new VideoCapture("[RTSP URL OF THE IP Camera]")//I used this Demo Link (rtsp://184.72.239.149/vod/mp4:BigBuckBunny_175k.mov)
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Source: https://habr.com/ru/post/1205390/

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