Java中的ScreenVideo编码器

Question

有人知道ScreenVideo(v1或v2)的Java视频编码器是免费的吗？我知道ffmpeg有一个C++版本,Lee Felarca在AS3中写了一个; 但我真的很想在Java中有一个.
AS3:http://www.zeropointnine.com/blog/assets_code/SimpleFlvWriter.as.txt

Answer 1

我相信Xuggle库可以满足您的需求 - 尽管它实际上可能是本地库(如ffmpeg)的包装器.

这是一个示例代码片段,用于将桌面屏幕截图编码为flv(mp4):

 final Robot robot = new Robot();
 final Toolkit toolkit = Toolkit.getDefaultToolkit();
 final Rectangle screenBounds = new Rectangle(toolkit.getScreenSize());

 // First, let's make a IMediaWriter to write the file.
 final IMediaWriter writer = ToolFactory.makeWriter("output.mp4");

 // 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,
     FRAME_RATE,
     screenBounds.width, screenBounds.height);

 // Now, we're going to loop
 long startTime = System.nanoTime();
 for (int index = 0; index < SECONDS_TO_RUN_FOR*FRAME_RATE.getDouble(); index++)
 {
   // take the screen shot
   BufferedImage screen = robot.createScreenCapture(screenBounds);

   // 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);
    System.out.println("encoded image: " +index);

   // sleep for framerate milliseconds
   Thread.sleep((long) (1000 / FRAME_RATE.getDouble()));
 }
 // Finally we tell the writer to close and write the trailer if
 // needed
 writer.close();

此代码来自Xuggle网站上的本教程.

更高级的编码,也在这里的Xuggle网站上.

如果您想要一个原生包装器,请为其他位示例代码运行"IContainerFormat flv"的Web搜索.

此外,还有一个非常相似的问题

更新:本机java实现

从github上的bigbluebutton项目中查看ScreenVideoEncoder.java.