How to capture a video in OpenCV

This recipe helps you capture a video in OpenCV

Recipe Objective: How to capture a video in OpenCV?

This recipe explains how to capture a video using OpenCV

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Step 1: Import the library

Let us import the cv2 library

import cv2

Step 2: Create a video object

We have to first initialize a video object using the cv2.VideoCapture() function

vid = cv2.VideoCapture(0)

Step 3: Capture the video frame by frame

Once the video object is initiated, we can capture the video frame by frame inside a python loop and set a condition that can break the loop.

Each video frame is read using the .read() function and displayed to the user instantly using the cv2.imshow() function.

The loop-breaking condition is set by setting a quitting button. Here the 'q' button is set as the quitting button, but the choice is up to the programmer.

while(True): 
    ret, frame = video.read() 
    cv2.imshow('frame', frame) 
    if cv2.waitKey(1) & 0xFF == ord('q'): 
        break

Step 4: Release the video.

We then finally release the video using the .release() function and close all the windows using cv2.destroyAllWindows()

video.release()
cv2.destroyAllWindows()

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