OpenCV2 videoCaputure doesn't work before 4.6

Nuitka version installed with pip:

1.1.8
Commercial: None
Python: 3.8.10 (tags/v3.8.10:3d8993a, May  3 2021, 11:48:03) [MSC v.1928 64 bit (AMD64)]
Flavor: Unknown
Executable: C:\Users\dan\AppData\Local\Programs\Python\Python38\python.exe
OS: Windows
Arch: x86_64
WindowsRelease: 10

opencv-python==4.5.5.64

breaking line: if not cap.isOpened(): Simple example:

import numpy as np
import cv2 as cv


cap = cv.VideoCapture('demo.mp4)
if not cap.isOpened():
    print("Cannot open camera")
    exit()
while True:
    # Capture frame-by-frame
    ret, frame = cap.read()
    # if frame is read correctly ret is True
    if not ret:
        print("Can't receive frame (stream end?). Exiting ...")
        break

build command: python -m nuitka --standalone --enable-plugin=numpy --include-data-files=demo.mp4=demo.mp4 entry.py

Error:

Traceback (most recent call last):
  File "C:\Users\dan\Desktop\label\democv\ENTRY~1.DIS\entry.py", line 6, in <module>
TypeError: Incorrect type of self (must be 'VideoCapture' or its derivative)

I get no issues running the python file or using cv2 to read an image, but videoCapure always gives that type error, is there a problem with the capture backend/ffmpeg?

[kayhayen]

Part of the 1.2 release that was made a while ago.

[kayhayen]

This is now on the develop branch, part of the current pre-release and should be part of the immanent 1.2 release.