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OpenCV Python Script Mac "aborts"

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So I'm just trying to run the basic OpenCV program import numpy as np import cv2 cap = cv2.VideoCapture(0) while(True): # Capture frame-by-frame ret, frame = cap.read() # Our operations on the frame come here gray = cv2.cvtColor(frame, cv2.COLOR_BGR2BGRA) # Display the resulting frame cv2.imshow('frame',frame) if cv2.waitKey(1) & 0xFF == ord('q'): break # When everything done, release the capture cap.release() cv2.destroyAllWindows() But for some reason when I try to run it (with python 2 or 3) I get this weird abort statement [1] 74309 abort python3 index.py (I'm guessing the 5 digit number is the PID) However, it does work if I pass in a path to an already existing video in the VideoCapture function. I am a beginner in all of this so I'm not really sure what the problem is Thanks :)

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