“Nonmatching transport in server reply” when cv2.VideoCapture rtsp onvif camera, how to fix?

Question

I\'m on windows 10 using python 3.6.4, installed opencv (3.4) through pip. Here\'s the code I\'m using:

import numpy as np
import cv2
cap = cv2.VideoCapture(         


        

Answer 1

1. Set env variable OPENCV_FFMPEG_CAPTURE_OPTIONS
2. Create and start a process with video capture code
3. Join the process

# file package/__main__.py

import os
from multiprocessing import Process
from package.main import run

if __name__ == '__main__':
    os.environ["OPENCV_FFMPEG_CAPTURE_OPTIONS"] = "rtsp_transport;udp"
    p = Process(target=run)
    p.start()
    p.join()

# file package/main.py

import numpy as np
import cv2


def run():
    capture = cv2.VideoCapture("rtsp://192.168.1.150/onvif1", cv2.CAP_FFMPEG)
    while True:
        result, frame = capture.read()
        cv2.imshow('video', frame)

        if cv2.waitKey(16) == ord("q"):
            break