【Java Opencv系列】4.4读取视频并显示

4.4读取视频并显示

本节内容代码下载链接：http://download.csdn.net/detail/u012343179/9798499

在testOpencv工程下新建VideoPlay.java窗体应用

代码如下：

package imageIO;

import java.awt.EventQueue;
import java.awt.image.BufferedImage;

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

import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.videoio.VideoCapture;

import tool.mat2BufferedImage;

import java.awt.BorderLayout;

public class VideoPlay {
	
	static{
		System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
	}

	private JFrame frame;
	private static JLabel lblNewLabel;

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					VideoPlay window = new VideoPlay();
					window.frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
				
			}
		});
		
		//我们的操作
		VideoCapture capture=new VideoCapture("F://2.avi");//读取视频
		if (!capture.isOpened()) {
			System.out.println("Error");
		} else {
			Mat webcam_image = new Mat();
			capture.read(webcam_image);
			while (true) {
				capture.read(webcam_image);
				if( !webcam_image.empty() ){
					BufferedImage b=mat2BufferedImage.matToBufferedImage(webcam_image);
					lblNewLabel.setIcon(new ImageIcon(b));
				}else{
					System.out.println("视频已结束!");  
			           capture.release();
			           break;  
				}
				
			}
		}
	}

	/**
	 * Create the application.
	 */
	public VideoPlay() {
		initialize();
	}

	/**
	 * Initialize the contents of the frame.
	 */
	private void initialize() {
		frame = new JFrame();
		frame.setBounds(0, 0, 1000, 800);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.getContentPane().setLayout(null);
		
		lblNewLabel = new JLabel("");
		lblNewLabel.setBounds(0, 0, 1000, 800);
		frame.getContentPane().add(lblNewLabel);
	}

}

注意：要运行该程序，必须将opencv目录下build/bin目录下的ffmpeg那个dll文件（有2个，一个是32位，另一个是64位，看你计算机位数进行选择）复制到C：windows/system32。或者另一种办法是将bin目录添加到系统环境变量path中去。

运行结果：

播放视频成功！

Bug：再次运行程序会报错

将ffmpeg重新复制又能成功一次，我想应该是opencv中的bug吧，欢迎解决的朋友留下解决方案！

CommissarMa      2017年3月30日10:14:20