将屏幕和摄像头记录到视频文件

Question

我试图创建一个应用程序，以记录用户的屏幕或从摄像头，并保存到视频文件。

我尝试过来使它工作，但是在Windows 64位中它失败了。我发现很老了，现在不支持它：

我的问题是:有没有其他图书馆可以帮助我们从网络摄像头上录制屏幕和视频？如果不支持Java，有什么语言可以帮助您呢？

我发现一些应用程序具有相同的特性：+ http://www.screencast-o-matic.com/ + http://www.apowersoft.com/free-online-screen-recorder --它是用户无需安装就可以从服务器下载的java applet。

谢谢你的进阶！

更新：--我正在HTML5中找到另一个解决方案

更新: 2013/07/05**我发现WebRTC 1.0可以达到解决方案，但Google还没有支持媒体流记录。

Answer 1

我有一个使用com.xuggle包记录屏幕的示例代码

import java.awt.AWTException;
import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.util.concurrent.TimeUnit;

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

public class ScreenRecordingExample {

    private static final double FRAME_RATE = 50;

private static final int SECONDS_TO_RUN_FOR = 20;

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

    private static Dimension screenBounds;

    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();

        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;
        }

    }

}