用java来调用OpenCV （二）

下面这个程序是实现每播放一秒视频就截取一张图片保存到本地的操作。

import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.MatOfRect;
import org.opencv.core.Point;
import org.opencv.core.Rect;
import org.opencv.core.Scalar;
import org.opencv.highgui.Highgui;
import org.opencv.highgui.VideoCapture;
import org.opencv.objdetect.CascadeClassifier;
import com.googlecode.javacv.cpp.opencv_highgui;//这个对象就只有在javacv里才有的

	public static void main(String[] args) {
		// System.out.println("Welcome to OpenCV " + Core.VERSION);
		// System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
		// Mat m = Mat.eye(3, 3, CvType.CV_8UC1);
		// System.out.println("m = " + m.dump());
		
		//加载本地的OpenCV库，这样就可以用它来调用Java API
		System.loadLibrary(Core.NATIVE_LIBRARY_NAME);  
		Test t = new Test();
		t.run2();
	}

	public void run2(){
		
		//读取视频文件
		VideoCapture cap = new VideoCapture("D:/testFile.mp4");
		System.out.println(cap.isOpened());
		
		//判断视频是否打开
		if(cap.isOpened()){
			
			//总帧数
			double frameCount = cap.get(opencv_highgui.CV_CAP_PROP_FRAME_COUNT);
			System.out.println(frameCount);
			
			//帧率
			double fps = cap.get(opencv_highgui.CV_CAP_PROP_FPS);
			System.out.println(fps);
			
			//时间长度
			double len = frameCount / fps; 
			System.out.println(len);
			Double d_s=new Double(len);
			System.out.println(d_s.intValue());
			
			Mat frame = new Mat();
			
			for(int i=0;i