how to connect video stream fasterly

env:
os windows
python 3.8
opencv==4.5.2.52

when I connect video stream ,it cost more than 1 second to connect ,how to make this time less than 0.5 second

ex:

import os
os.environ["OPENCV_VIDEOIO_MSMF_ENABLE_HW_TRANSFORMS"] = "0"
import cv2,datetime
s = "rtsp://128.8.84.224:18554/stream"

print(f"\ncv2.VideoCapture 1  -- time {datetime.datetime.now().strftime('%Y%m%d %H:%M:%S:%f')}")
self.cap = cv2.VideoCapture(s)
print(f"\ncv2.VideoCapture 2  -- time {datetime.datetime.now().strftime('%Y%m%d %H:%M:%S:%f')}")

cv2.VideoCapture 1  -- time 20240220 10:56:10:635229

cv2.VideoCapture 2  -- time 20240220 10:56:11:730034

if the video stream resolution is heigher ,it maybe cost more than 3 second to connect.

Start by reproducing the timing around cv2.VideoCapture(s) with the stated Windows, Python 3.8, and OpenCV 4.5.2.52 environment and RTSP stream. Compare behavior across stream resolutions and determine whether the delay belongs to opencv-python or the underlying video backend; completion would require a confirmed cause, minimal reproduction, and documented fix or limitation.