C + + OpenCV read video and call camera __c++

OpenCV through the Videocapture class, to read the video, call the camera

Read Video:

1. Instantiate and initialize first

Videocapture capture;

Capture.open ("1.avi");

2. Initialize simultaneously with instantiation

Videocapture Capture ("1.avi");

Play Video:

After the video reads like a Videocapture class object, use a loop to display each frame

while (1)

{

Mat frame;

capture>>frame;

Imshow ("read video", frame);

Waitkey (30);

}

Call camera

Change the code videocapture capture ("1.avi") to 1.avi in 0.

Let's look at a piece of code:

#include <opencv2\opencv.hpp>
using namespace CV;
using namespace std;

int main ()
{
	//read video or webcam
	videocapture capture ("1.avi");

	while (true)
	{
		Mat frame;
		Capture >> frame;
		Imshow ("read video", frame);
		Waitkey (a);	Delay of
	0;

This is to read the file and then play it:

The following are the results of the operation:

Here's a look at the engineering catalog.

Here's the code to open the camera:

#include <opencv2\opencv.hpp>
using namespace CV;
using namespace std;

int main ()
{
	//read video or Camera
	Videocapture capture (0);

	while (true)
	{
		Mat frame;
		Capture >> frame;
		Imshow ("read video", frame);
		Waitkey (a);	Delay of
	return
	0;
}

Run Result: