System information (version)

• OpenCV => 4.1.0-2 from Arch repository
• Operating System / Platform => Manjaro (fully updated)

Detailed description

In the Python wrapper, unknown fourcc causes cv2.VideoWriter to segfault.

Steps to reproduce

import cv2

fourcc = cv2.VideoWriter_fourcc(*'aaaa')
print(fourcc)
writer = cv2.VideoWriter('/tmp/test.avi', fourcc, 30.0, (320, 240))

$ python test.py
1633771873
OpenCV: FFMPEG: tag 0x61616161/'aaaa' is not found (format 'avi / AVI (Audio Video Interleaved)')'
fish: “python test.py” terminated by signal SIGSEGV (Address boundary error)

Desired solution

Python exception should be thrown. There should also be a way to check whether a fourcc is available without triggering the exception.