How can I connect an hd-tvi camera to a PC for further use of images from this camera in OpenCV Python

Question

I want to use an outdoor analog hd-tvi camera instead of a webcam in OpenCV for image processing in python. I can't find any documentation or articles on the web on this topic. Help me figure it out.

I want the PC to see the analog camera as a webcam so that I can use it with the opencv library: cam = cv.VideoCapture(0)