从视频文件中捕获帧而不在屏幕上播放 [英] Capurting Frames from a video file without playing it on screen

问题描述

我是java编程语言的初学者，最近我有一项从视频文件中捕获帧的工作，我也开发了一个程序，但它在帮助下在屏幕上播放视频时会这样做任何球员.

我为此开发了以下程序.

public class Beginning 实现 Runnable {私有线程线程；私有静态长计数器 = 0;私人最终 int FRAME_CAPTURE_RATE = 124;私人机器人机器人；公共开始()抛出异常{机器人 = 新机器人()；线程=新线程(这个)；线程开始()；}public static void main(String[] args) 抛出异常 {开始开始=新开始()；}公共无效运行(){为了 (;;) {尝试 {矩形 screenRect = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());BufferedImage bufferedImage = robots.createScreenCapture(screenRect);ImageIO.write(bufferedImage, "png", new File("D:\\CapturedFrame\\toolImage" + counter + ".png"));计数器++；thread.sleep(FRAME_CAPTURE_RATE);} 捕获(异常 e){System.err.println("发生了一些可疑的事情......");}}}}

我的先生告诉我从任何指定的视频中捕获所有帧而不在屏幕上播放，任何人都可以建议我我该怎么做.

解决方案

好吧，你可以简单地使用 OpenCV.这是一个例子.

https://www.tutorialspoint.com/opencv/opencv_using_camera.htm

您可以在 VideoCapture 类中使用任何视频代替相机:

VideoCapture capture = new VideoCapture(0);

代替上面的代码行，你可以使用

VideoCapture capture = new VideoCapture("/location/of/video/");

我希望这就是您要找的.

I am a beginner in java programming language, Recently I have got a work to capture frames from a video file, I have also developed a program that does so, but it does that when the video is played on screen with the help of any player.

I have developed following program to do so.

public class Beginning implements Runnable {

    private Thread thread;
    private static long counter = 0;
    private final int FRAME_CAPTURE_RATE = 124;
    private Robot robot;

    public Beginning() throws Exception {
        robot = new Robot();
        thread = new Thread(this);
        thread.start();
    }

    public static void main(String[] args) throws Exception {
        Beginning beginning = new Beginning();
    }

    public void run() {
        for (;;) {
            try {
                Rectangle screenRect = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
                BufferedImage bufferedImage = robot.createScreenCapture(screenRect);
                ImageIO.write(bufferedImage, "png", new File("D:\\CapturedFrame\\toolImage" + counter + ".png"));
                counter++;
                thread.sleep(FRAME_CAPTURE_RATE);
            } catch (Exception e) {
                System.err.println("Something fishy is going on...");
            }
        }
    }
}

My sir has told to capture all frames from any specified videos without playing it on screen, Can anyone please suggest me that how can I do so.

解决方案

Well, you can simply use OpenCV. Here is an example of it.

https://www.tutorialspoint.com/opencv/opencv_using_camera.htm

You can use any video in place of the camera in the VideoCapture class as:

VideoCapture capture = new VideoCapture(0);

instead of the above line of code, you can use

VideoCapture capture = new VideoCapture("/location/of/video/");

I hope this is what you are looking for.

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