playing video file using python opencv

Question

I'm trying to play a video file using python opencv this is my code , but it is not showing the vidfeo file when I run the code

import numpy as np
import cv2

cap = capture =cv2.VideoCapture('C2.mp4')
while(cap.isOpened()):
    ret, frame = cap.read()

    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

    cv2.imshow('frame',gray)
    cv2.waitKey(1)

cap.release()
cv2.destroyAllWindows()

I tried the answer in : link but not working again

Answer 1

I think u just have to increase the number inside cv2.waitKey() function to may be 25 or 30. You should get the desired result.

Also, there is no need to write cap = capture = cv2.......

Simply, writing,

cap = cv2.videoCapture('path of the video')

should work as well . Hope it works.

Answer 2

import numpy as np
import cv2

cap = cv2.VideoCapture('C2.mp4')
while(cap.isOpened()):
    ret, frame = cap.read()
    if ret == True:
        gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
        cv2.imshow('frame', gray)
        # & 0xFF is required for a 64-bit system
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break
    else:
        break
cap.release()
cv2.destroyAllWindows()

Answer 3

This code worked for me. It shows both the original and the grayscale video output. Press 'q' to exit. I also didnt see the need for cap = capture... in your code.

import cv2
import numpy as np

cap = cv2.VideoCapture(0)
while True:
ret, frame = cap.read()
    gray = cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)
    cv2.imshow('frame',frame)
    cv2.imshow('grayF',gray)
    if cv2.waitKey(1) & 0xFF == ord('q'):
         break

cap.release()
cv2.destroyAllWindows()