如果openCV加载了nu.pattern.openCV.loadShared（），Java openCV将挂起文件的视频捕获；

我有一个来自的示例代码，与使用

nu.pattern.OpenCV.loadShared（）在静态块中加载OpenCV库有一点不同：

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;

import org.opencv.core.CvType;
import org.opencv.core.Mat;
import org.opencv.core.MatOfByte;
import org.opencv.core.Size;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.videoio.VideoCapture;
import org.opencv.imgproc.Imgproc;

public class JavaCVPrjt01 {
    static {
        //System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
        nu.pattern.OpenCV.loadShared();
    }
    public static void main(String[] args) {
        JFrame jframe = new JFrame("HUMAN MOTION DETECTOR FPS");
        jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JLabel vidpanel = new JLabel();
        jframe.setContentPane(vidpanel);
        jframe.setSize(1280,720) ;
        jframe.setVisible(true);

        Mat frame = new Mat();
        Mat outerBox = new Mat();
        Size sz = new Size(1280,720);
        VideoCapture camera = new VideoCapture("D:/Downloads/video4.mp4");

        while (true) {
            if (camera.read(frame)) {
                Imgproc.resize(frame,frame, sz );
                outerBox = new Mat(frame.size(), CvType.CV_8UC1);
                Imgproc.cvtColor(frame, outerBox, Imgproc.COLOR_BGR2GRAY);
                Imgproc.GaussianBlur(outerBox, outerBox, new Size(3, 3), 0);

                ImageIcon image = new ImageIcon(Mat2bufferedImage(outerBox));
                vidpanel.setIcon(image);
                vidpanel.repaint();

            }
        }
    }

    public static BufferedImage Mat2bufferedImage(Mat image) {
        MatOfByte bytemat = new MatOfByte();
        Imgcodecs.imencode(".jpg", image, bytemat);
        byte[] bytes = bytemat.toArray();
        InputStream in = new ByteArrayInputStream(bytes);
        BufferedImage img = null;
        try {
            img = ImageIO.read(in);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return img;
    }

}

当然，还添加了所需的依赖项：

    <dependency>
        <groupId>org.bytedeco.javacpp-presets</groupId>
        <artifactId>opencv</artifactId>
        <version>3.2.0-1.3</version>
    </dependency>

    <dependency>
        <groupId>org.openpnp</groupId>
        <artifactId>opencv</artifactId>
        <version>3.2.0-1</version>
    </dependency>

它挂起的地方，我没有线索来检查JNI级别的错误。
这是一个许可问题，使得无法将ffmpeg包含到其中

 <dependency>
    <groupId>org.openpnp</groupId>
    <artifactId>opencv</artifactId>
    <version>3.2.0-1</version>
</dependency>

显式加载
opencv\u java
和
opencv\u ffmpeg
成功。如果不显式加载
opencv\u ffmpeg
，
VideoCapture的
.read（frame）
总是返回false，没有提到任何缺少的本机
ffmpeg
依赖性问题

pom.xml
中所需的java依赖项包括：

    <dependency>
        <groupId>org.bytedeco.javacpp-presets</groupId>
        <artifactId>opencv</artifactId>
        <version>2.4.11-0.11</version>
    </dependency>
    <dependency>
        <groupId>org.openpnp</groupId>
        <artifactId>opencv</artifactId>
        <version>2.4.11-2</version>
    </dependency>


org.bytedeco.javacpp-presets
opencv
2.4.11-0.11
org.openpnp
opencv
2.4.11-2

（请不要担心，我已经降级了opencv版本）
这是一个许可问题，使得无法将ffmpeg包含到

 <dependency>
    <groupId>org.openpnp</groupId>
    <artifactId>opencv</artifactId>
    <version>3.2.0-1</version>
</dependency>

显式加载
opencv\u java
和
opencv\u ffmpeg
成功。如果不显式加载
opencv\u ffmpeg
，
VideoCapture的
.read（frame）
总是返回false，没有提到任何缺少的本机
ffmpeg
依赖性问题

pom.xml
中所需的java依赖项包括：

    <dependency>
        <groupId>org.bytedeco.javacpp-presets</groupId>
        <artifactId>opencv</artifactId>
        <version>2.4.11-0.11</version>
    </dependency>
    <dependency>
        <groupId>org.openpnp</groupId>
        <artifactId>opencv</artifactId>
        <version>2.4.11-2</version>
    </dependency>


org.bytedeco.javacpp-presets
opencv
2.4.11-0.11
org.openpnp
opencv
2.4.11-2

（请不要介意，我已经降级了opencv版本）