Capturing webcam video with OpenCV in WSL2

I am trying to access my webcam through OpenCV in WSL2 (Ubuntu). I found this blog post where it explains how to connect USB devices to WSL2. Running usbipd wsl list in windows command prompt lists the following devices:

> usbipd wsl listBUSID  VID:PID    DEVICE                                                        STATE1-1    0c45:6725  Integrated Webcam                                             Not attached1-2    046d:c534  USB Input Device                                              Not attached1-3    0cf3:e007  Qualcomm QCA61x4A Bluetooth                                   Not attached1-4    27c6:639c  Goodix Moc Fingerprint                                        Not attached2-2    8564:7000  USB Mass Storage Device                                       Not attached

Here my machine's integrated webcam is a USB device with BUSID 1-1. I ran usbipd wsl attach --busid 1-1 to connect my integrated webcam to WSL.

Now from WSL, typing lsusb lists the devices as follows:

> lsusbBus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hubBus 001 Device 003: ID 0c45:6725 Microdia Integrated_Webcam_HDBus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

It looks like the integrated webcam has been successfully connected to WSL (listed as Microdia Integrated_Webcam_HD).

This is the code used to access the webcam:

import cv2import syssource = cv2.VideoCapture(0)win_name = 'Camera Preview'cv2.namedWindow(win_name, cv2.WINDOW_NORMAL)while cv2.waitKey(1) != 27:  # Escape    has_frame, frame = source.read()    if not has_frame:        break    cv2.imshow(win_name, frame)source.release()cv2.destroyWindow(win_name)

Here cv2.VideoCapture() takes an index as argument. The OpenCV documentation mentions:

If I run the code above with 0 as the argument, I get the following output:

[ WARN:0@0.216] global /io/opencv/modules/videoio/src/cap_v4l.cpp (889) open VIDEOIO(V4L2:/dev/video0): can't open camera by index

I have connected USB devices to WSL, but still I am not able to access the integrated webcam. Any ideas how to get around this problem would be much appreciated!