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When I try to run OpenCV over WSL using the usbipd_win library and a recompiled kernel (enabled UVC support), I get the error message [ WARN:0@30.423] global cap_v4l.cpp:1119 tryIoctl VIDEOIO(V4L2:/dev/video0): select() timeout. dmesg:

usb usb1: Not yet implemented
usb usb1: Not yet implemented
... repeated "Not yet implemented" and "callbacks suppressed lines"
usb usb1: Not yet implemented
usb usb1: Not yet implemented
usb usb1: Not yet implemented
usb usb1: Not yet implemented
usb usb1: Not yet implemented
vhci_hcd: unlink->seqnum 26060
vhci_hcd: the urb (seqnum 26060) was already given back
vhci_hcd: unlink->seqnum 26065
vhci_hcd: the urb (seqnum 26065) was already given back
uvcvideo 1-1:1.1: Failed to resubmit video URB (-1).
vhci_hcd: unlink->seqnum 26067
vhci_hcd: the urb (seqnum 26067) was already given back
vhci_hcd: unlink->seqnum 26071
vhci_hcd: the urb (seqnum 26071) was already given back
vhci_hcd: unlink->seqnum 26073
vhci_hcd: the urb (seqnum 26073) was already given back

uname -a: Linux LAPTOP-0KQUO0A2 5.15.83.1-microsoft-standard-WSL2+ #1 SMP ...

Christoph Rackwitz
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jay jayjay
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  • issue is with `usbipd`. file the bug with the USB/IP project or linux kernel. reproduce with guvcview or VLC or ffmpeg/ffplay. this is not an OpenCV issue. https://linux-usb.vger.kernel.narkive.com/xGgVXYu4/patch-0-3-usbip-move-usbip-out-of-staging – Christoph Rackwitz Jan 08 '23 at 22:01
  • Yes, but could anyone explain what the error message means? – jay jayjay Jan 08 '23 at 23:57
  • it means they didn't "yet" implement something. you can either do that for them (open source), or file an issue for them to fix this. – Christoph Rackwitz Jan 09 '23 at 14:49

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