I have a video file, I know how to save all of the frames,but my question is how to save only one frame of every 20 frames as an image? Thanks.
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Answer
This is based on this tutorial: https://theailearner.com/2018/10/15/extracting-and-saving-video-frames-using-opencv-python/
import cv2 # Opens the Video file cap= cv2.VideoCapture('C:/New/Videos/Play.mp4') i=0 while(cap.isOpened()): ret, frame = cap.read() if ret == False: break if i % 20 == 0: # this is the line I added to make it only save one frame every 20 cv2.imwrite('kang'+str(i)+'.jpg',frame) i+=1 cap.release() cv2.destroyAllWindows()