带有 OpenCV 的视频采集卡(类似网络摄像头) [英] video capture card (webcam like) with OpenCV

问题描述

我想使用视频采集卡来捕捉我的屏幕显示，并通过 OpenCV/C++ 处理图像.

I want to use video capture card to capture my screen display, and process the image by OpenCV/C++.

我听说有一些类似于网络摄像头的视频采集卡.(即我可以在 OpenCV 中通过 VideoCapture 获取屏幕显示.)

I have heard that there's some video capture card which is webcam like.(i.e. I can get the screen display by VideoCapture in OpenCV.)

谁能告诉我应该买哪种视频采集卡?

Can someone tell me which video capture card should I buy?

谢谢！！！

推荐答案

我不知道是否有某种方法可以直接使用 OpenCV 来实现.但是，一个简单的解决方法可能是这样的:

I do not know if there some way to achieve that directly using OpenCV. However, a simple workaround could be like this:

1. 使用此软件，您可以创建流式传输屏幕的新网络摄像头:https://sparkosoft.com/how-to-stream-desktop-as-webcam-video

2. 使用 OpenCV，您可以使用以下代码开始捕获流:

1. Using this software you can create new webcam that stream your screen: https://sparkosoft.com/how-to-stream-desktop-as-webcam-video

2. Using OpenCV you can start capture the stream using this code:

cv::VideoCapture cap;
if(!cap.open(0)) // Use the new webcam Id instead of 0
    return 0;
while(true){
      cv::Mat frame;
      cap >> frame;
      if(frame.empty()) break;
      cv::imshow("Screen", frame);
      if( waitKey(10) == 27 ) break;
}
return 0;

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