reliability: "20% (author)"
date: 2024-10-28
os: "win11; wsl2 ubuntu 22.04; 5.15.153.1-microsoft-standard-WSL2+ #2 SMP Sun Oct 27 22:02:06 CST 2024 x86_64 x86_64 x86_64 GNU/Linux"
author: "4070s wsl julyfun"
assume-you-know: [computer]

connect usb

首先参考官方 : https://learn.microsoft.com/zh-cn/windows/wsl/connect-usb#attach-a-usb-device.
再使用本文中的 chmod 和简易 test.py 测试 : https://blog.csdn.net/weixin_37210821/article/details/135137942
如果失败，则执行本文的编译内核，其中内核 tag 版本号可修改为 uname -a 中的版本

24.10.28，先重装内核再执行 ms 官方的挂载命令，可通过 test.py 测试

每次重启电脑后，均需要

# 管理员 powershell
usbipd list
usbipd bind --busid <busid, ex: 4-4>
usbipd attach --wsl --busid <busid>

# wsl
sudo chmod 777 /dev/video*
# 查看有无
ls /dev/video*
lsusb

import cv2

W=640
H=480
cap = cv2.VideoCapture(0) # 可能需要改，改此运行成功 24.11.26
cap.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter_fourcc('M','J','P','G'))
#cap.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter_fourcc('Y','U','Y','V'))
cap.set(cv2.CAP_PROP_FRAME_WIDTH, W)
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, H)
cap.set(cv2.CAP_PROP_FPS, 30)

while True:
    ret, frame = cap.read()
    if not ret:
        continue
    cv2.imshow('usb cam test', frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()