在Java中使用OpenCv的IP摄像机
我试图从IP摄像头获取并显示video流。 我在这里找到了一些示例代码： http ： //answers.opencv.org/question/24012/reading-video-stream-from-ip-camera-in-opencv-java/
但它对我不起作用。 当我使用内部网络摄像头时，我的代码可以工作，但是当我将相机切换到IP时，它不起作用。 我不知道为什么。 有人可以帮帮我吗？ 这是我的代码：
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://sofzh.miximages.com/java/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; } } 感谢您的帮助。 我能够用你所说的找到合适的IP地址(http://192.168.0.6/VIDEO.CGI) （是的，我知道7变为6，它是一个不同的摄像头）在我的浏览器中获取video。 但我仍然得到以下错误。
Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Width (0) and height (0) must be > 0 at java.awt.image.SampleModel.(Unknown Source) at java.awt.image.ComponentSampleModel.(Unknown Source) at java.awt.image.PixelInterleavedSampleModel.(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.(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)
我认为这是因为VideoCapture没有正确抓取框架。
这是我试图使用的相机http://www.trendnet.com/products/proddetail.asp?prod=150_TV-IP100W-N
.jpg表示单个图像文件，而.mjpg表示访问video流。 定义用于连接的IP和PORT非常重要。
根据您拥有的设备和相机Web界面中定义的设置，URL将有所不同：
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");
当您通过浏览器访问有效的URL时，它应显示video流。 找到有效的地址后，只需将其传递给VideoCapture构造函数即可。 在这个例子中，我展示了如何通过HTTP访问流，但也支持RTSP协议。
经过3到4周的努力，我找到了100％的工作解决方案
首先，你必须动态加载ffmpeg的dll文件，即使用
System.loadLibrary("[NAME OF YOUR DLL FILE]") You can find the required dll file in **opencv/build/x64/vc11/bin**我的情况下DLL的名称是“opencv_ffmpeg2413_64.dll”复制文件到Project的默认路径并使用
System.loadLibrary("opencv_ffmpeg2413_64");//You May have different File Name Depending on the Version of OpenCV Installed on your Computer
然后你可以简单地使用
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)