import org.bytedeco.javacpp.opencv_core;

import org.bytedeco.javacv.*;

public class Main {

    public static void main(String[] args) throws InterruptedException, FrameGrabber.Exception {

        FrameGrabber grabber = new FFmpegFrameGrabber("/dev/video0");

        //OpenCVFrameGrabber grabber = new OpenCVFrameGrabber(0);

        grabber.setImageWidth(640);

        grabber.setImageHeight(480);

        grabber.start();   //开始获取摄像头数据

        OpenCVFrameConverter.ToMat convertToMat = new OpenCVFrameConverter.ToMat();

        while (true) {

            Frame frame = grabber.grab();

            opencv_core.Mat mat = convertToMat.convert(frame);

            if (mat.empty()) {

                System.out.println("mat is empty.");

                break;

            } else {

                System.out.println("Heith:" + frame.imageHeight + " x Width:" + frame.imageWidth);

                Thread.sleep(30);

            }

        }

        grabber.stop();

        grabber.close();

        grabber.release();

    }

}

vim /etc/modules-load.d/modules.conf

bcm2835-v4l2