Extract a frame every second in Python

edit

Images are not stored in folder specified. And if I remove the path to folder than it save all images in the Presented working directory. Please tell me how to give path to extracted images?

import cv2 import math

videoFile = "video.mp4"

cap = cv2.VideoCapture(videoFile)
frameRate = cap.get(5) #frame rate
x=1
while(cap.isOpened()):
    frameId = cap.get(1) #current frame number
    ret, frame = cap.read()
    if (ret != True):
        break
    if (frameId % math.floor(frameRate) == 0):
        filename = './test_images/image' +  str(int(x)) + ".jpg";x+=1
        cv2.imwrite(filename, frame)

cap.release()
print ("Done!")

In line 4, add the whole path with double slash as imagesFolder = "C:\Users\User1\Downloads\Video1"

Hello @harsha@Iqbal, how to do the same extraction for webcam or live video stream ? I want to extract and save frames only one frame after each 2 seconds from webcam stream. Can you advise as simply changing VideoCapture argument to 0 dosen't helps?

@harsha would u or anyone else please explain how the modulo works? thanks

@coderI It is saving the last frame every second. If frame rate is 30 fps and x = 30 (it is the 30th frame), it saves the image, one second later after another 30 frames, it will once again save the frame. If it were not conditional, it would try to write as many files per second as the stream's fps which generally would clog the pipeline and hurt throughput.