在 Java 中使用 OpenCV 3.1 捕获 rtsp 视频流

Capture rtsp video stream using OpenCV 3.1 in Java

我正在尝试在 java 中创建一个应用程序,使用 OpenCV 从 Web 服务中获取视频流,这是一个带有几个摄像头和一个录制设备的摄像头系统。

我找到了访问通道 1 上的摄像头的地址 "rtsp://login:pass@IP address:Port/cam/realmonitor?channel=1&subtype=0"。

为了打开摄像头流,我使用了这段代码(目前它捕获了一个本地 usb 摄像头):

VideoCapture 上限; Mat2Image mat2Img = new Mat2Image();

public VideoGrabber(){
    cap = new VideoCapture(0);

    try {
        System.out.println("Sleeping..");
        Thread.sleep(4000);
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    System.out.println("Camera on..");
    cap.open("0");
    if(!cap.isOpened()){
        System.out.println("Camera Error");
    }
    else{
        System.out.println("Camera OK?");
    }
}

抓取视频流后,我将其放入 JFrame。

我想我应该把视频流服务地址放在 cap.open( ... ) 但使用 rtsp://login:pass@http://192.168.1.14:8006/cam/realmonitor?channel=1&subtype=0 给了我 "Exception in thread "AWT- EventQueue-0" java.lang.IllegalArgumentException: 宽度 (0) 和高度 (0) 必须 > 0"。

请帮忙,

编辑 我发现 rtsp://login:pass@http://192.168.1.14:554/cam/realmonitor?channel=1&subtype=0 在 vlc 中有效,但在 opencv 中仍然没有运气.

编辑#2 行。在玩过 vlcl、gstreamer 和大多数流行的解决方案之后,它才开始工作。我不知道这毕竟不是坏的 rtsp 地址。代码:

static {
        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
        //load the library of opencv
    }

    VideoCapture cap;
    Mat2Image mat2Img = new Mat2Image();
    Mat matFilter = new Mat();

    public VideoGrabber(){
        cap = new VideoCapture();

        try {
            System.out.println("Sleeping..");
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        System.out.println("Camera on..");
        cap.open("rtsp://login:pass@192.168.1.14:554/cam/realmonitor?channel=1&subtype=0");
        if(!cap.isOpened()){
            System.out.println("Camera Error");
        }
        else{
            System.out.println("Camera OK?");
        }


    }

回答我的问题和 Fouad 我 post 工作代码: 我猜答案是加载 ffmpeg dll。

//all the imports
public class App {
static {
    String path = null;
    try {
        //I have copied dlls from opencv folder to my project folder
        path = "E:\JAVA Projects\OpenCv\RTSP Example\libraries";
        System.load(path+"\opencv_java310.dll");
        System.load(path+"\opencv_ffmpeg310_64.dll");
    } catch (UnsatisfiedLinkError e) {
        System.out.println("Error loading libs");
    }
}

public static void main(String[] args) {

    App app = new App();
    //Address can be different. Check your cameras manual. :554 a standard RTSP port for cameras but it can be different
    String addressString = "rtsp://login:password@192.168.1.14:554/cam/realmonitor?channel=11&subtype=0";
    Mat mat = new Mat();
    VideoCapture capturedVideo = new VideoCapture();

    boolean isOpened = capturedVideo.open(addressString); 
    app.openRTSP(isOpened, capturedVideo, mat);

}

public void openRTSP(boolean isOpened, VideoCapture capturedVideo, Mat cameraMat) {
    if (isOpened) {
        boolean tempBool = capturedVideo.read(cameraMat);
        System.out.println("VideoCapture returned mat? "+tempBool);

        if (!cameraMat.empty()) {
            System.out.println("Print image size: "+cameraMat.size());
            //processing image captured in cameraMat object

        } else {
            System.out.println("Mat is empty.");
        }
    } else {
        System.out.println("Camera connection problem. Check addressString");
    }
}
}