Face recognition and detect IP camera is slow, lag

Hello everyone

There is such a code, the problem with it is that when you mark the face, the image of the IP camera will be slow (Lag, high response time)

Can anyone help me see why?

import cv2
from simple_facerec import SimpleFacerec

# Encode faces from a folder
sfr = SimpleFacerec()

# Load Camera
cap = cv2.VideoCapture('rtsp://')

while True:
    ret, frame = cap.read()

    # Detect Faces
    face_locations, face_names = sfr.detect_known_faces(frame)
    for face_loc, name in zip(face_locations, face_names):
        y1, x2, y2, x1 = face_loc[0], face_loc[1], face_loc[2], face_loc[3]

        cv2.putText(frame, name,(x1, y1 - 10), cv2.FONT_HERSHEY_DUPLEX, 1, (0, 0, 200), 2)
        cv2.rectangle(frame, (x1, y1), (x2, y2), (0, 0, 200), 4)

    cv2.imshow("Frame", frame)

    key = cv2.waitKey(1)
    if key == 27:


that takes time. there is no way around that.

this forum does not offer support for the third party library you use. talk to the author of the library.