使用 xuggler 使用鼠标指针捕获屏幕

Question

以下是使用 xuggler 捕获屏幕并从中制作视频的代码，它工作正常，但生成的视频中没有鼠标光标。我还想捕获鼠标指针以显示鼠标活动。

有人可以指导我吗？

package com.test.video;

import java.awt.AWTException;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.MouseInfo;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.concurrent.TimeUnit;

import javax.imageio.ImageIO;


import com.xuggle.mediatool.IMediaWriter;
import com.xuggle.mediatool.ToolFactory;
import com.xuggle.xuggler.ICodec;

public class ScreenRecordingExample {

    private static final double FRAME_RATE = 5;

    private static final int SECONDS_TO_RUN_FOR = 120;

    private static final String outputFilename = "c:/mydesktop.mp4";

    private static Dimension screenBounds;

    private static Graphics2D imageGraphics;

    public static Image m_MouseIcon = null;

    public static void main(String[] args) {

        // let's make a IMediaWriter to write the file.
        final IMediaWriter writer = ToolFactory.makeWriter(outputFilename);

        screenBounds = Toolkit.getDefaultToolkit().getScreenSize();

        // We tell it we're going to add one video stream, with id 0,
        // at position 0, and that it will have a fixed frame rate of FRAME_RATE.
        writer.addVideoStream(0, 0, ICodec.ID.CODEC_ID_MPEG4, screenBounds.width/2, screenBounds.height/2);

        long startTime = System.nanoTime();

        try {
            m_MouseIcon = ImageIO.read(ScreenRecordingExample.class.getResource("resource/captionMouseIcon.png"));
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }

        for (int index = 0; index < SECONDS_TO_RUN_FOR * FRAME_RATE; index++) {

            // take the screen shot
            BufferedImage screen = getDesktopScreenshot();

            // convert to the right image type
            BufferedImage bgrScreen = convertToType(screen, BufferedImage.TYPE_3BYTE_BGR);

            // encode the image to stream #0
            writer.encodeVideo(0, bgrScreen, System.nanoTime() - startTime, TimeUnit.NANOSECONDS);

            // sleep for frame rate milliseconds
            try {
                Thread.sleep((long) (1000 / FRAME_RATE));
            } 
            catch (InterruptedException e) {
                // ignore
            }

        }

        // tell the writer to close and write the trailer if  needed
        writer.close();

    }

    public static BufferedImage convertToType(BufferedImage sourceImage, int targetType) {

        BufferedImage image;

        // if the source image is already the target type, return the source image
        if (sourceImage.getType() == targetType) {
            image = sourceImage;
        }
        // otherwise create a new image of the target type and draw the new image
        else {
            image = new BufferedImage(sourceImage.getWidth(), sourceImage.getHeight(), targetType);
            image.getGraphics().drawImage(sourceImage, 0, 0, null);
        }

        return image;

    }

    private static BufferedImage getDesktopScreenshot() {
        try {
            Robot robot = new Robot();
            Rectangle captureSize = new Rectangle(screenBounds);
            return robot.createScreenCapture(captureSize);
        } 
        catch (AWTException e) {
            e.printStackTrace();
            return null;
        }

    }

}

谢谢，

Answer 1

使用 MouseInfo.getPointerInfo().getLocation() 获取指针的当前位置。在 BufferedImage 上的 Point 处绘制一个“闭合传真”(1) 指针。

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1) 对于 Screenshooter，我使用指针的 GIF 图像。

Answer 2

您可以使用 Java Native Access (JNA) 实时检索操作系统特定的鼠标光标类型，然后从系统文件（Windows 中的 user32.dll）中提取其图像并覆盖在屏幕截图上。