Java tutorial
import java.awt.Graphics; import java.awt.Image; import java.awt.image.BufferedImage; import java.io.ByteArrayInputStream; import javax.imageio.ImageIO; import org.opencv.core.Core; 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.videoio.VideoWriter; /* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ /** * * @author erandi */ public class RecorderInterace extends javax.swing.JFrame { /** * Creates new form WebCamTesting */ //definitions private DaemonThread myThread = null; int count = 0; VideoCapture webSource = null; Mat frame = new Mat(); MatOfByte mem = new MatOfByte(); //class of demon thread class DaemonThread implements Runnable { protected volatile boolean runnable = false; VideoWriter videoWriterObj; Size size = new Size(640, 480); @Override public void run() { synchronized (this) { while (runnable) { if (webSource.grab()) { try { videoWriterObj.open("output.avi", 0000, 20.0, size, false); webSource.retrieve(frame); Imgcodecs.imencode(".bmp", frame, mem); Image im = ImageIO.read(new ByteArrayInputStream(mem.toArray())); BufferedImage buff = (BufferedImage) im; Graphics g = jPanel1.getGraphics(); if (g.drawImage(buff, 0, 0, getWidth(), getHeight() - 50, 200, 0, buff.getWidth(), buff.getHeight(), null)) { if (runnable == false) { System.out.println("Going to wait()"); this.wait(); } } } catch (Exception ex) { System.out.println("Error"); } } } } } } public RecorderInterace() { initComponents(); } /** * This method is called from within the constructor to initialize the form. * WARNING: Do NOT modify this code. The content of this method is always * regenerated by the Form Editor. */ @SuppressWarnings("unchecked") // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents private void initComponents() { jPanel1 = new javax.swing.JPanel(); jButtonStart = new javax.swing.JButton(); jButtonStop = new javax.swing.JButton(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1); jPanel1.setLayout(jPanel1Layout); jPanel1Layout.setHorizontalGroup(jPanel1Layout .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGap(0, 416, Short.MAX_VALUE)); jPanel1Layout.setVerticalGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGap(0, 360, Short.MAX_VALUE)); jButtonStart.setText("Start Recording"); jButtonStart.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButtonStartActionPerformed(evt); } }); jButtonStop.setText("Stop Recording"); jButtonStop.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButtonStopActionPerformed(evt); } }); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup().addGap(41, 41, 41) .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addContainerGap(42, Short.MAX_VALUE)) .addGroup(layout.createSequentialGroup().addGap(70, 70, 70).addComponent(jButtonStart) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addComponent(jButtonStop).addGap(113, 113, 113))); layout.setVerticalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup().addGap(30, 30, 30) .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(39, 39, 39) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jButtonStart).addComponent(jButtonStop)) .addContainerGap(27, Short.MAX_VALUE))); pack(); }// </editor-fold>//GEN-END:initComponents private void jButtonStartActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButtonStartActionPerformed // TODO add your handling code here: webSource = new VideoCapture(0); //video capture from default cam myThread = new DaemonThread(); //create object from thread class Thread t = new Thread(myThread); t.setDaemon(true); myThread.runnable = true; t.start(); //start thread jButtonStart.setEnabled(false); //deactivate start button jButtonStop.setEnabled(true); // activate stop button }//GEN-LAST:event_jButtonStartActionPerformed private void jButtonStopActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButtonStopActionPerformed // TODO add your handling code here: myThread.runnable = false; //stop thread jButtonStop.setEnabled(false); //activate start jButtonStart.setEnabled(true); //deactivate stop jPanel1.repaint(); webSource.release(); }//GEN-LAST:event_jButtonStopActionPerformed /** * @param args the command line arguments */ public static void main(String args[]) { /* Set the Nimbus look and feel */ //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) "> /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html */ try { for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { if ("Nimbus".equals(info.getName())) { javax.swing.UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (ClassNotFoundException ex) { java.util.logging.Logger.getLogger(RecorderInterace.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(RecorderInterace.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(RecorderInterace.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(RecorderInterace.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } //</editor-fold> System.loadLibrary(Core.NATIVE_LIBRARY_NAME); // load native library of opencv /* Create and display the form */ java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new RecorderInterace().setVisible(true); } }); } // Variables declaration - do not modify//GEN-BEGIN:variables private javax.swing.JButton jButtonStart; private javax.swing.JButton jButtonStop; private javax.swing.JPanel jPanel1; // End of variables declaration//GEN-END:variables }