How to save a video using OpenCV VideoWriter to a specific directory -- python

Question

I am trying to save a video in a specific folder. but after running the code no output is saved. Could anyone help? Thanks.

cap = cv2.VideoCapture(file_paths[0])
fgbg = cv2.bgsegm.createBackgroundSubtractorMOG()
fourcc = cv2.VideoWriter_fourcc(*'XVID')
name = "C:\jupyter_projects\Test Folder\Intention dataset\background_subtracted\out.mp4"
out = cv2.VideoWriter(name,fourcc, 20,(320,180),False)

while(1):
    ret, frame = cap.read()
    if (ret == True):
        resized_frame = cv2.resize(frame,(320,180),fx=0,fy=0, interpolation = cv2.INTER_CUBIC)
        fgmask = fgbg.apply(resized_frame)
        cv2.imshow('Frame',fgmask)
        out.write(fgmask)
        if cv2.waitKey(30) & 0xFF == ord('q'):
            break
    else:
        break
cap.release()
out.release()
cv2.waitKey(5)
cv2.destroyAllWindows()

PS: when I use default directory for saving videos output will be saved.

out = cv2.VideoWriter("out.mp4",fourcc, 20,(320,180),False)

Answer 1

Try

fourcc = cv2.VideoWriter_fourcc(*'MP4V')

instead of

fourcc = cv2.VideoWriter_fourcc(*'XVID')

Answer 2

When you call the function

cv2.VideoWriter("/your/path/filename.mp4",fourcc, 20,(320,180))

I hope it helps :)

Answer 3

Using createBackgroundSubtractorMOG2() ,

import cv2
cap = cv2.VideoCapture(0)
# fgbg = cv2.bgsegm.createBackgroundSubtractorMOG()
fgbg = cv2.createBackgroundSubtractorMOG2()
fourcc = cv2.VideoWriter_fourcc(*'XVID')
name = "C://path//of//your_dir//out.mp4"
out = cv2.VideoWriter(name,fourcc, 20,(320,180),False)

while(1):
    ret, frame = cap.read()
    if (ret == True):
        resized_frame = cv2.resize(frame,(320,180),fx=0,fy=0, interpolation = cv2.INTER_CUBIC)
        fgmask = fgbg.apply(resized_frame)
        cv2.imshow('Frame',fgmask)
        out.write(fgmask)
        if cv2.waitKey(30) & 0xFF == ord('q'):
            break
    else:
        break
cap.release()
out.release()
cv2.waitKey(5)
cv2.destroyAllWindows()

This will save your out.mp4 given location. You can also use single forward slash instead of double forward slash, when specifying location of your file.

Answer 4

尝试对文件目录使用单引号和双斜杠。