JpegImagesToMovie仅添加一个图像

Question

因此，在网上长时间搜索后，我想出了以下代码来拍摄jpeg屏幕截图，然后将其转换为mov：

public class ScreenshotTests {
    public static int counter = 1;
    public static void main(String[] args) throws IOException, AWTException, InterruptedException {
        ActionListener taskPerformer = new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
                Robot robot = null;
                try {
                    robot = new Robot();
                } catch (AWTException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
                Rectangle rectangle = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
                BufferedImage image = robot.createScreenCapture(rectangle);
                try {
                    ImageIO.write(image, "jpg", new File("images/test" + counter + ".jpg"));
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                counter++;
            }
        };
        Timer timer = new Timer(0, taskPerformer);
        timer.setRepeats(true);
        timer.start();

        Thread.sleep(5000);
        timer.stop();
        Vector<String> imgLst = new Vector<String>();
        for (int i = 0; i < new File("images").list().length; i++) {
            imgLst.add("images/test" + i + 1 + ".jpg");
        }

                JpegImagesToMovie imageToMovie = new JpegImagesToMovie();
                MediaLocator oml;
                if ((oml = imageToMovie.createMediaLocator("test1.mov")) == null) {
                    System.err.println("Cannot build media locator from: " + "test1.mov");
                    System.exit(0);
                }
                int interval = 50;
                imageToMovie.doIt(1920, 1080, (1000 / interval), imgLst, oml);
    }
}

而且运行正常，没有任何错误。但是，虽然我确实在image文件夹中获得了几十个图像，但视频仅包含最后一个图像（视频的长度为零秒）。怎么了？