怎么在Java中利用OpenCV3.2播放视频
这篇文章给大家介绍怎么在Java中利用OpenCV3.2播放视频,内容非常详细,感兴趣的小伙伴们可以参考借鉴,希望对大家能有所帮助。
创新互联建站-专业网站定制、快速模板网站建设、高性价比金林网站开发、企业建站全套包干低至880元,成熟完善的模板库,直接使用。一站式金林网站制作公司更省心,省钱,快速模板网站建设找我们,业务覆盖金林地区。费用合理售后完善,10余年实体公司更值得信赖。
实现思路
首先用OpenCV相关API读取视频流或者视频文件的每一帧,然后通过Swing JComponent组件实现视频每一帧的更新显示,我模仿了C++的HIGHGUI里面创建窗口与显示图像接口,基于Swing实现了一个视频播放窗口类,把读取到的每一帧都传给它就可以实现连续显示即播放。每帧之间相隔100毫秒,我是通过Java线程Sleep方法实现。
运行效果 - USB摄像头读取每帧
运行效果 - 视频文件读取每帧
代码实现
视频文件读取
package com.gloomyfish.video.demo; import java.awt.Dimension; import java.awt.image.BufferedImage; import org.opencv.core.Core; import org.opencv.core.Mat; import org.opencv.videoio.VideoCapture; public class VideoDemo { public static void main(String[] args) { System.loadLibrary(Core.NATIVE_LIBRARY_NAME); // 打开摄像头或者视频文件 VideoCapture capture = new VideoCapture(); //capture.open(0); capture.open("D:/vcprojects/images/768x576.avi"); if(!capture.isOpened()) { System.out.println("could not load video data..."); return; } int frame_width = (int)capture.get(3); int frame_height = (int)capture.get(4); ImageGUI gui = new ImageGUI(); gui.createWin("OpenCV + Java视频读与播放演示", new Dimension(frame_width, frame_height)); Mat frame = new Mat(); while(true) { boolean have = capture.read(frame); Core.flip(frame, frame, 1);// Win上摄像头 if(!have) break; if(!frame.empty()) { gui.imshow(conver2Image(frame)); gui.repaint(); } try { Thread.sleep(100); } catch (InterruptedException e) { e.printStackTrace(); } } } public static BufferedImage conver2Image(Mat mat) { int width = mat.cols(); int height = mat.rows(); int dims = mat.channels(); int[] pixels = new int[width*height]; byte[] rgbdata = new byte[width*height*dims]; mat.get(0, 0, rgbdata); BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); int index = 0; int r=0, g=0, b=0; for(int row=0; row视频与图像显示窗口类
package com.gloomyfish.video.demo; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import javax.swing.JComponent; import javax.swing.JDialog; public class ImageGUI extends JComponent { /** * */ private static final long serialVersionUID = 1L; private BufferedImage image; public ImageGUI() { } @Override protected void paintComponent(Graphics g) { Graphics2D g2d = (Graphics2D)g; if(image == null) { g2d.setPaint(Color.BLACK); g2d.fillRect(0, 0, this.getWidth(), this.getHeight()); } else { g2d.drawImage(image, 0, 0, this.getWidth(), this.getHeight(), null); System.out.println("show frame..."); } } public void createWin(String title) { JDialog ui = new JDialog(); ui.setTitle(title); ui.getContentPane().setLayout(new BorderLayout()); ui.getContentPane().add(this, BorderLayout.CENTER); ui.setSize(new Dimension(330, 240)); ui.setVisible(true); } public void createWin(String title, Dimension size) { JDialog ui = new JDialog(); ui.setTitle(title); ui.getContentPane().setLayout(new BorderLayout()); ui.getContentPane().add(this, BorderLayout.CENTER); ui.setSize(size); ui.setVisible(true); } public void imshow(BufferedImage image) { this.image = image; this.repaint(); } }关于怎么在Java中利用OpenCV3.2播放视频就分享到这里了,希望以上内容可以对大家有一定的帮助,可以学到更多知识。如果觉得文章不错,可以把它分享出去让更多的人看到。
本文标题:怎么在Java中利用OpenCV3.2播放视频
网址分享:http://myzitong.com/article/jcgojs.html