java - Java 中的 ScreenVideo 编码器

Question

有人知道免费的 ScreenVideo(v1 或 v2)Java 视频编码器吗？我知道 ffmpeg 有一个 C++ 版本，Lee Felarca 用 AS3 写了一个；但我真的很想用 Java 编写一个。
AS3:http://www.zeropointnine.com/blog/assets_code/SimpleFlvWriter.as.txt

Answer 1

我相信Xuggle库做你想做的事——尽管它实际上可能是 ffmpeg 等原生库的包装器。

这是将桌面屏幕截图编码为 flv (mp4) 的示例代码片段:

 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tutorial在 Xuggle 网站上。

更高级的编码，也在 Xuggle 网站上 here .

如果 native 包装器是您想要的，请运行网络搜索 "IContainerFormat flv"对于其他示例代码。

此外，已经有一个 very similar question

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更新:原生 java 实现

查看 ScreenVideoEncoder.java来自 github 上的 bigbluebutton 项目。