问题描述
我正在尝试从 IP 摄像机获取并显示视频流.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/
I am trying to get and display an video stream from a IP camera. I found some sample code here:http://answers.opencv.org/question/24012/reading-video-stream-from-ip-camera-in-opencv-java/
但这对我不起作用.我的代码在我使用内部网络摄像头时有效，但是当我将摄像头切换到 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:
But it is not working for me. my code works when I use my internal webcam, but when I switch the camera to the 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;
}
}
感谢您的帮助.我能够使用您所说的找到正确的 IP 地址 (http://192.168.0.6/VIDEO.CGI) (是的，我知道 7 变成了 6，它是不同的相机)在我的浏览器中获取视频.但我仍然收到以下错误.
Thank you for the help. I was able to use what you said to find the proper IP address (http://192.168.0.6/VIDEO.CGI) (yes, I know the 7 became a 6, its a different camera) to get a video in my browser. but I am 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)
我认为这是因为 VideoCapture 没有正确抓取帧.
I think it is because VideoCapture is not grabbing the frame correctly.
这是我正在尝试使用的相机http://www.trendnet.com/products/proddetail.asp?prod=150_TV-IP100W-N
This is the camera I am trying to use http://www.trendnet.com/products/proddetail.asp?prod=150_TV-IP100W-N
推荐答案
.jpg 指的是单个图像文件，而 .mjpg 则可以访问视频流.定义用于连接的 IP 和 PORT 很重要.
.jpg refers to a single image file, while .mjpg gives access to the video stream. It's important to define the IP and the PORT used to connect.
根据您拥有的设备和相机网络界面中定义的设置，URL 会有所不同:
Depending on the device you have and the settings defined in the web interface of the camera, the URL is going to 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");
当您通过浏览器访问有效 URL 时，它应该显示视频流.找到有效的地址后，只需将其传递给 VideoCapture 构造函数.在这个示例中，我展示了如何通过 HTTP 访问流，但也支持 RTSP 协议.
When you access a valid URL via browser it should display the video stream. Once you find the address that works, simply pass it to VideoCapture constructor. In this examples I showed how to access the stream via HTTP, but the RTSP protocol is also supported.
这篇关于Java中带有OpenCv的IP摄像头的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！