OpenCV and aiortc freeze

[brunokeymolen]

Hey all,

Do I need to install a specific OpenCV version when using aiortc?

The following code freezes, "b" is never reached, when removing the aiortc import "b" is reached:

import cv2
from aiortc import MediaStreamTrack

print("a")
cv2.namedWindow("mywindow")
print("b")

I'm on Ubuntu 20.04

pip show aiortc
Name: aiortc
Version: 1.3.2
Summary: An implementation of WebRTC and ORTC
Home-page: https://github.com/aiortc/aiortc
Author: Jeremy Lainé
Author-email: [email protected]
License: BSD
Location: /home/bruno/virtual-envs/myenv/lib/python3.8/site-packages
Requires: aioice, av, cffi, cryptography, google-crc32c, pyee, pylibsrtp
Required-by: 

pip show opencv-python
Name: opencv-python
Version: 4.6.0.66
Summary: Wrapper package for OpenCV python bindings.
Home-page: https://github.com/skvark/opencv-python
Author: 
Author-email: 
License: MIT
Location: /home/bruno/virtual-envs/myenv/lib/python3.8/site-packages
Requires: numpy, numpy
Required-by:

[brunokeymolen]

This one works:
pip install opencv-python==4.2.0.34