I am trying to use following code :
import numpy as np
import cv2
cap=cv2.VideoCapture('video.avi')
ret, old_frame = cap.read()
old_gray = cv2.cvtColor(old_frame, cv2.COLOR_BGR2GRAY)
And I end up with following error :
error: (-215) scn == 3 || scn == 4 in function cv::ipp_cvtColor
What could be the cause ? If i change the input of cap from .avi file to 0 (default camera) the programm works fine. Any suggestions? Thanks in advance !