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

When you call the function

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

I hope it helps :)

Answer 2

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.