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cv2.VideoWriter always saves 5.55kb(5.5kb) video file (not working)

Shakeratto 2019. 6. 10. 15:34

The reason why cv2.2VdeoWriter can't save the video content with correct code is the output video's width, height size is different with input video's width, height size.

You need to match them using below code.

import cv2

cap = cv2.VideoCapture('input.mp4')

 

vid_width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))

vid_height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))

 

fourcc = cv2.VideoWriter_fourcc(*'XVID')

out = cv2.VideoWriter('output.avi', fourcc, 20.0, (vid_width, vid_height))

 

while(cap.isOpened()):

    ret,frame = cap.read()

    if ret is False:

        break

 

    # Image Processing 

 

    out.write(frame)

    cv2.imshow('frame', frame)

 

    k = cv2.waitKey(50) & 0xff

    if k == 27: # Escape (ESC)

        break

 

cap.release()

out.release()

cv2.destroyAllWindows()
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