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How to store video on your computer in OpenCV using C++?
When we want to store a video, we have to define the location we want to store. Then we need to specify FourCC, FourCC stands for 'Four Character Code'. It is a sequence of 4-byte characters that identifies data formats. We also need to declare the FPS to store a video and frame size is also necessary for this storing process. The following program takes real-time video stream from the default camera and stores the video in C directory.
The following program demonstrates how to store video in your computer in OpenCV using C++.
Example
#include<opencv2/opencv.hpp>//OpenCV header to use VideoCapture class and VideoWriter//
#include<iostream>
using namespace std;
using namespace cv;
int main() {
Mat myImage;//Declaring a matrix to store the frames//
VideoCapture cap(0);//Taking an object of VideoCapture Class to capture video from default camera//
namedWindow("Video Player");//Declaring the video to show the video//
if(!cap.isOpened()){ //This section prompt an error message if no video stream is found//
cout << "Failed to access the camera" << endl;
system("pause");
return-1;
}
int frame_width = cap.get(CAP_PROP_FRAME_WIDTH);//Getting the frame height//
int frame_height = cap.get(CAP_PROP_FRAME_HEIGHT);//Getting the frame width//
VideoWriter video("video1.mp4",10,17,Size(frame_width, frame_height));//Declaring an object of VideoWriter class//
while (true){ //Taking an everlasting loop to show the video//
cap >> myImage;
if (myImage.empty()){ //Breaking the loop if no video frame is detected//
break;
}
video.write(myImage);//Write the video//
imshow("Video Player", myImage);//Showing the video//
char c= (char)waitKey(25);
if(c==27){
break;
}
}
cap.release();//Releasing the buffer memory//
video.release();
return 0;
}This program will store the video in the defined directory as a defined name in the defined format.
Updated on: 10-Mar-2021
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