Java 中带有 OpenCv 的 IP 摄像机
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IP camera with OpenCv in Java
提问by user1376339
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/
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/
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:
但它对我不起作用。当我使用内部网络摄像头时，我的代码有效，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：
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;
}
}
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.
感谢您的帮助。我能够使用你所说的找到正确的 IP 地址(http://192.168.0.6/VIDEO.CGI)（是的，我知道 7 变成了 6，它是一个不同的相机）在我的浏览器中获取视频。但我仍然收到以下错误。
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$PaintCallback.run(Unknown Source)
at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source)
at sun.awt.SunGraphicsCallback.runComponents(Unknown Source)
at java.awt.Container.paint(Unknown Source)
at java.awt.Window.paint(Unknown Source)
at javax.swing.RepaintManager.run(Unknown Source)
at javax.swing.RepaintManager.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain.doIntersectionPrivilege(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.access00(Unknown Source)
at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access0(Unknown Source)
at java.awt.EventQueue.run(Unknown Source)
at java.awt.EventQueue.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain.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 it is because VideoCapture is not grabbing the frame correctly.
我认为这是因为 VideoCapture 没有正确抓取帧。
This is the camera I am trying to use http://www.trendnet.com/products/proddetail.asp?prod=150_TV-IP100W-N
这是我尝试使用的相机 http://www.trendnet.com/products/proddetail.asp?prod=150_TV-IP100W-N
采纳答案by karlphillip
.jpgrefers to a single image file, while .mjpggives access to the video stream. It's important to define the IP and the PORT used to connect.
.jpg是指单个图像文件，而.mjpg可以访问视频流。定义用于连接的 IP 和端口很重要。
Depending on the device you have and the settings defined in the web interface of the camera, the URL is going to be different:
根据您拥有的设备和相机 Web 界面中定义的设置，URL 会有所不同：
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");
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 VideoCaptureconstructor. In this examples I showed how to access the stream via HTTP, but the RTSP protocol is also supported.
当您通过浏览器访问有效 URL 时，它应该显示视频流。一旦找到有效的地址，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。
回答by Anas khan
After 3 to 4 weeks of hardwork,I found a 100% working solution for this
经过 3 到 4 周的努力，我找到了一个 100% 可行的解决方案
First of All you have to load the ffmpeg's dll file Dynamically i-e Using
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**The name of DLL in my case is "opencv_ffmpeg2413_64.dll"copy the file to default path of the Project and use
System.loadLibrary("[NAME OF YOUR DLL FILE]")
You can find the required dll file in **opencv/build/x64/vc11/bin**在我的例子中 DLL 的名称是“opencv_ffmpeg2413_64.dll”将文件复制到项目的默认路径并使用
System.loadLibrary("opencv_ffmpeg2413_64");//You May have different File Name Depending on the Version of OpenCV Installed on your Computer
Then You can Simply use
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)
