时钟|问题12

下面是使用C++ OpenCV对C++中的视频进行模糊编码的说明。

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需要知道的事情:

(1) 该代码只能在Linux环境下编译。

(2) 要在windows中运行,请使用文件:“blur_video”。o’并在cmd中运行它。但是,如果它没有运行(系统架构中的问题),则在windows中通过对代码进行适当且明显的更改来编译它,例如:Use 代替

(3) 编译命令:g++-w blur_vid。cpp-o blur_vid `pkg-config­libs opencv`

(4) 运行命令:/模糊视频

(5) 视频有点颠簸。mp4必须与代码位于同一目录中。

在运行代码之前,请确保在//系统上安装了OpenCV。

解释代码片段:

#include "opencv2/highgui/highgui.hpp"
// highgui - an interface to video and image capturing.
#include <opencv2/imgproc/imgproc.hpp> // For dealing with images
#include <iostream>
// The header files for performing input and output.

using namespace cv;
// Namespace where all the C++ OpenCV functionality resides.

using namespace std;
// For input output operations.

int main()
{
    VideoCapture cap("Bumpy.mp4");
    // cap is the object of class video capture that tries to capture Bumpy.mp4
    if ( !cap.isOpened() ) // isOpened() returns true if capturing has been initialized.
    {
        cout << "Cannot open the video file. ";
        return -1;
    }

    double fps = cap.get(CV_CAP_PROP_FPS); //get the frames per seconds of the video
    // The function get is used to derive a property from the element.
    // Example:
    // CV_CAP_PROP_POS_MSEC : Current Video capture timestamp.
    // CV_CAP_PROP_POS_FRAMES : Index of the next frame.
 
    namedWindow("A_good_name",CV_WINDOW_AUTOSIZE); //create a window called "MyVideo"
    // first argument: name of the window.
    // second argument: flag- types:
    // WINDOW_NORMAL : The user can resize the window.
    // WINDOW_AUTOSIZE : The window size is automatically adjusted to 
    //fit the displayed image() ), and you cannot change the window size manually.
    // WINDOW_OPENGL : The window will be created with OpenGL support.

    while(1)
    {
        Mat frame;
        // Mat object is a basic image container. frame is an object of Mat.
        if (!cap.read(frame)) // if not success, break loop
        // read() decodes and captures the next frame.
        {
            cout<<" Cannot read the video file. ";
            break;
        }
    blur(frame,frame,Size(10,10)); // To blur the image.
    imshow("A_good_name", frame);
    // first argument: name of the window.
    // second argument: image to be shown(Mat object).
    
    if(waitKey(30) == 27) // Wait for 'esc' key press to exit
    {
        break;
    }
}
return 0;
}
// END OF PROGRAM

关于作者:

Aditya Prakash是印度学院的本科生 Aditya 信息技术部,瓦多达拉。他主要是用C++编写代码。他的座右铭是:迄今为止一切顺利。他打板球,看超级英雄电影,踢足球,并且是回答问题的超级粉丝。

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