# Java Swing Application for Image/Video Capture from Camera or Android Device
Here's a complete Java Swing application that can:
1. Load images from camera/monitor/Android device
2. Capture single images
3. Record video with pause/stop functionality
4. Save files to target location
```java
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.concurrent.atomic.AtomicBoolean;
import javax.imageio.ImageIO;
public class CameraCaptureApp extends JFrame {
private JLabel imageLabel;
private AtomicBoolean recording = new AtomicBoolean(false);
private AtomicBoolean paused = new AtomicBoolean(false);
private File outputFile;
private Timer captureTimer;
private BufferedImage currentImage;
private VideoRecorder videoRecorder;
public CameraCaptureApp() {
setTitle("Camera Capture Application");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new BorderLayout());
// Image display area
imageLabel = new JLabel("No image available", SwingConstants.CENTER);
imageLabel.setPreferredSize(new Dimension(640, 480));
add(imageLabel, BorderLayout.CENTER);
// Control buttons
JPanel controlPanel = new JPanel();
JButton loadImageBtn = new JButton("Load Image");
JButton captureBtn = new JButton("Capture Image");
JButton startRecordBtn = new JButton("Start Recording");
JButton pauseRecordBtn = new JButton("Pause Recording");
JButton stopRecordBtn = new JButton("Stop Recording");
JButton saveImageBtn = new JButton("Save Image");
// Button actions
loadImageBtn.addActionListener(e -> loadImage());
captureBtn.addActionListener(e -> captureImage());
startRecordBtn.addActionListener(e -> startRecording());
pauseRecordBtn.addActionListener(e -> pauseRecording());
stopRecordBtn.addActionListener(e -> stopRecording());
saveImageBtn.addActionListener(e -> saveImage());
// Add buttons to panel
controlPanel.add(loadImageBtn);
controlPanel.add(captureBtn);
controlPanel.add(startRecordBtn);
controlPanel.add(pauseRecordBtn);
controlPanel.add(stopRecordBtn);
controlPanel.add(saveImageBtn);
add(controlPanel, BorderLayout.SOUTH);
// Initialize video recorder
videoRecorder = new VideoRecorder();
pack();
setLocationRelativeTo(null);
}
private void loadImage() {
// For Android device connection, you would need additional setup
// This is a simplified version that loads from file
JFileChooser fileChooser = new JFileChooser();
int returnValue = fileChooser.showOpenDialog(this);
if (returnValue == JFileChooser.APPROVE_OPTION) {
File selectedFile = fileChooser.getSelectedFile();
try {
BufferedImage img = ImageIO.read(selectedFile);
displayImage(img);
} catch (IOException e) {
JOptionPane.showMessageDialog(this, "Error loading image: " + e.getMessage());
}
}
}
private void captureImage() {
// This would capture from camera - simplified version
// In real app, you would use JavaCV or other camera API
try {
// Simulate camera capture with a blank image
BufferedImage capturedImage = new BufferedImage(640, 480, BufferedImage.TYPE_INT_RGB);
Graphics2D g2d = capturedImage.createGraphics();
g2d.setColor(Color.WHITE);
g2d.fillRect(0, 0, 640, 480);
g2d.setColor(Color.RED);
g2d.drawString("Camera Capture Simulation", 50, 50);
g2d.dispose();
displayImage(capturedImage);
currentImage = capturedImage;
} catch (Exception e) {
JOptionPane.showMessageDialog(this, "Error capturing image: " + e.getMessage());
}
}
private void startRecording() {
if (!recording.get()) {
JFileChooser fileChooser = new JFileChooser();
fileChooser.setDialogTitle("Specify video output file");
if (fileChooser.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {
outputFile = fileChooser.getSelectedFile();
if (!outputFile.getName().toLowerCase().endsWith(".avi")) {
outputFile = new File(outputFile.getAbsolutePath() + ".avi");
}
recording.set(true);
paused.set(false);
// Start video recording
videoRecorder.startRecording(outputFile);
// Start capture timer (simulating video frames)
captureTimer = new Timer(1000/30, e -> {
if (recording.get() && !paused.get()) {
BufferedImage frame = getCurrentFrame();
videoRecorder.addFrame(frame);
}
});
captureTimer.start();
JOptionPane.showMessageDialog(this, "Recording started to: " + outputFile.getAbsolutePath());
}
}
}
private void pauseRecording() {
if (recording.get()) {
paused.set(!paused.get());
JOptionPane.showMessageDialog(this, paused.get() ? "Recording paused" : "Recording resumed");
}
}
private void stopRecording() {
if (recording.get()) {
recording.set(false);
paused.set(false);
captureTimer.stop();
videoRecorder.stopRecording();
JOptionPane.showMessageDialog(this, "Recording stopped. Saved to: " + outputFile.getAbsolutePath());
}
}
private void saveImage() {
if (currentImage != null) {
JFileChooser fileChooser = new JFileChooser();
fileChooser.setDialogTitle("Save Image");
if (fileChooser.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {
File fileToSave = fileChooser.getSelectedFile();
if (!fileToSave.getName().toLowerCase().endsWith(".png")) {
fileToSave = new File(fileToSave.getAbsolutePath() + ".png");
}
try {
ImageIO.write(currentImage, "PNG", fileToSave);
JOptionPane.showMessageDialog(this, "Image saved to: " + fileToSave.getAbsolutePath());
} catch (IOException e) {
JOptionPane.showMessageDialog(this, "Error saving image: " + e.getMessage());
}
}
} else {
JOptionPane.showMessageDialog(this, "No image to save!");
}
}
private void displayImage(BufferedImage image) {
ImageIcon icon = new ImageIcon(image.getScaledInstance(
imageLabel.getWidth(), imageLabel.getHeight(), Image.SCALE_SMOOTH));
imageLabel.setIcon(icon);
currentImage = image;
}
private BufferedImage getCurrentFrame() {
// In real app, this would get frame from camera
// Here we're just simulating with a timestamped image
BufferedImage frame = new BufferedImage(640, 480, BufferedImage.TYPE_INT_RGB);
Graphics2D g2d = frame.createGraphics();
g2d.setColor(Color.WHITE);
g2d.fillRect(0, 0, 640, 480);
g2d.setColor(Color.BLUE);
g2d.drawString("Frame at: " + System.currentTimeMillis(), 50, 50);
g2d.dispose();
return frame;
}
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> {
CameraCaptureApp app = new CameraCaptureApp();
app.setSize(800, 600);
app.setVisible(true);
});
}
// Inner class for video recording functionality
class VideoRecorder {
private FileOutputStream fos;
private DataOutputStream dos;
public void startRecording(File file) {
try {
fos = new FileOutputStream(file);
dos = new DataOutputStream(fos);
// Write header (simplified - real app would use proper video format)
dos.writeUTF("VIDEO_START");
} catch (IOException e) {
JOptionPane.showMessageDialog(CameraCaptureApp.this,
"Error starting recording: " + e.getMessage());
}
}
public void addFrame(BufferedImage frame) {
if (dos != null) {
try {
// Convert image to bytes (simplified)
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(frame, "jpg", baos);
byte[] frameData = baos.toByteArray();
// Write frame data
dos.writeInt(frameData.length);
dos.write(frameData);
dos.flush();
} catch (IOException e) {
JOptionPane.showMessageDialog(CameraCaptureApp.this,
"Error writing frame: " + e.getMessage());
}
}
}
public void stopRecording() {
try {
if (dos != null) {
dos.writeUTF("VIDEO_END");
dos.close();
}
if (fos != null) {
fos.close();
}
} catch (IOException e) {
JOptionPane.showMessageDialog(CameraCaptureApp.this,
"Error stopping recording: " + e.getMessage());
} finally {
dos = null;
fos = null;
}
}
}
}
```
## Key Features:
1. **Image Loading**: Load images from file system (can be extended for camera/Android)
2. **Image Capture**: Simulates camera capture (replace with real camera API)
3. **Video Recording**:
- Start/Stop recording
- Pause/Resume functionality
- Save to user-specified location
4. **Image Saving**: Save captured images to file
## For Real Camera/Android Integration:
To make this work with actual cameras or Android devices, you would need:
1. **For Webcam/Monitor Capture**:
```java
// Using JavaCV (OpenCV wrapper)
OpenCVFrameGrabber grabber = new OpenCVFrameGrabber(0); // 0 for default camera
grabber.start();
Frame frame = grabber.grab();
// Convert Frame to BufferedImage
```
2. **For Android Device Camera**:
- Set up an Android app that streams camera to a server
- Connect your Java Swing app to that server
- Or use Android Debug Bridge (ADB) to capture screens
3. **Proper Video Encoding**:
```java
// Using JavaCV
FFmpegFrameRecorder recorder = new FFmpegFrameRecorder("output.mp4", width, height);
recorder.setFormat("mp4");
recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
recorder.start();
recorder.record(frame);
```
Would you like me to enhance any specific part of this application or explain any component in more detail?
No comments:
Post a Comment