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_projectsTest FolderIntention datasetbackground_subtractedout.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)
Asked By: Saha

||
Source

Answers:

Try

fourcc = cv2.VideoWriter_fourcc(*'MP4V')

instead of

fourcc = cv2.VideoWriter_fourcc(*'XVID')
Answered By: Berkay

Try using single quote and using double slash for your file directory.

Answered By: Birdman

When you call the function

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

I hope it helps 🙂

Answered By: marioandluigi8

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.

Answered By: Ransaka Ravihara

If you are on windows, use a raw string in the format of: r"C:bluh bluh directoryabc"

Answered By: AChang