使用 opencv 保存裁剪的视频

Question

I try to crop away the left most part of my video and save the processed video. The cv2.imshow part works fine but the saved file can't be played. Thanks in advance!

import cv2


cap = cv2.VideoCapture('Vid.mov')
outcrop = cv2.VideoWriter('outcrop.mov', -1, 20.0, (640,480))

while True:
    ret, frame = cap.read()
    sky = frame[100:, 100:]
    cv2.imshow('Video', sky)
    outcrop.write(sky)         #I guess the problem lies in "(sky)" ??

    k = cv2.waitKey(5) & 0xFF
    if k == 27:
        break

cap.release()
outcrop.release()
cv2.destroyAllWindows()

Answer 1

try to resize sky to 640x480, try

sky = cv2.resize(sky, (640, 480))

and write it