OpenCV error when using Live Feed for imageAI tutorial

Question

I am looking to complete a simple live feed object detection tutorial from the 'imageai' documentation (https://imageai.readthedocs.io/en/latest/video/index.html). As per tutorial the code is following:

from imageai.Detection import VideoObjectDetection
import os
import cv2

execution_path = os.getcwd()

camera = cv2.VideoCapture(0)

detector = VideoObjectDetection()
detector.setModelTypeAsYOLOv3()
detector.setModelPath(os.path.join(execution_path , "yolov3.pt"))
detector.loadModel()

video_path = detector.detectObjectsFromVideo(camera_input=camera,
    output_file_path=os.path.join(execution_path, "camera_detected_video")
    , frames_per_second=20, log_progress=True, minimum_percentage_probability=30)

print(video_path)

I have installed all the necessary packages for the tutorial (including opencv package in my environmental variable). However, once I run the code, I get the following error:

OpenCV: Couldn't read movie file "" [ERROR:[email protected]] global cap.cpp:166 open VIDEOIO(CV_IMAGES): raised OpenCV exception:

OpenCV(4.7.0) /private/var/folders/p5/T/pip-install-fu_8bn3g/opencv-python_/opencv/modules/videoio/src/cap_images.cpp:293: error: (-215:Assertion failed) !_filename.empty() in function 'open'

I saw that similar issue arose when the path for detectObjectFromImage was specified incorrectly. However, I do not understand how is it related here if I am using VideoCapture(0).

Thank you so much for the help!