What is the best way to get OpenCV to read the HDMI input in python? for example- capture live feed from a camera connected with a video telemetry receiver, which receives video from remote camera and gives HDMI out. and get that feed into Opencv and implement a face detection algorithm.
All the HDMI grabbers I know are registered same way as regular web cameras. Therefore it will be available with
cv2.VideoCapture(...)
https://docs.opencv.org/master/d8/dfe/classcv_1_1VideoCapture.html