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iphone as usb webcam: but "no usb devices detected"

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quixote
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iphone as usb webcam: but "no usb devices detected"

#1 Post by quixote »

I have a Lenovo Thinkpad Carbon X1 running Bookworm. Kernel 6.1.0-6

I bought a lightning-HDMI adapter, HDMI cable, and and HDMI-USBc to plug into the iphone and the computer. I have True Visage running on the iphone to provide a video feed.

Hooked them all up, but nothing sees any USB devices except:

Code: Select all

$ lsusb     [i][with   iphone+hdmi setup plugged in ][/i]
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub                               
Bus 003 Device 002: ID 0bda:2172 Realtek Semiconductor Corp. BillBoard Device      
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub                               
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 010: ID 138a:0097 Validity Sensors, Inc. 
Bus 001 Device 003: ID 13d3:5682 IMC Networks SunplusIT Integrated Camera
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub 

Code: Select all

$ lsusb        [i][without iphone+hdmi setup plugged in] [/i]
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 010: ID 138a:0097 Validity Sensors, Inc. 
Bus 001 Device 003: ID 13d3:5682 IMC Networks SunplusIT Integrated Camera
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
So the system is seeing the so-called "Billboard Device", which I gather means "device I don't understand" but it does see it.

I tried to see what dmesg might have to say:

Code: Select all

$ sudo dmesg | grep 2172
[   42.490276] usb 3-2: New USB device found, idVendor=0bda, idProduct=2172, bcdDevice= 1.00
[96835.618190] usb 3-2: New USB device found, idVendor=0bda, idProduct=2172, bcdDevice= 1.00
[100407.633285] usb 3-2: New USB device found, idVendor=0bda, idProduct=2172, bcdDevice= 1.00
[105409.847228] usb 3-2: New USB device found, idVendor=0bda, idProduct=2172, bcdDevice= 1.00
That means it initialized okay? I saw somewhere it might need a manual start with

Code: Select all

sudo modprobe uvcvideo
but that didn't help. I have an HDMI port, but leaving out the HDMI-USBc didn't achieve anything.

So I'm at a dead end. It feels like this must be some kind of driver problem, but searches don't turn up anything. Anyone have an idea what else I could try?

Many thanks!

Edited to add that my user _is_ in group video.
Last edited by quixote on 2023-03-16 05:41, edited 1 time in total.

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Re: iphone as usb webcam: but "no usb devices detected"

#2 Post by sunrat »

Moved to Testing/Unstable subforum.
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Re: iphone as usb webcam: but "no usb devices detected"

#3 Post by quixote »

(Oops. Thanks! Sorry :redface: )

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Re: iphone as usb webcam: but "no usb devices detected"

#4 Post by quixote »

(Erm, help? Please!) bump.

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Re: iphone as usb webcam: but "no usb devices detected"

#5 Post by sunrat »

If you have no answer in a week, it likely means nobody here knows.
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Re: iphone as usb webcam: but "no usb devices detected"

#6 Post by FreewheelinFrank »

A common answer to a web search (use iphone as webcam linux) seems to be OBS, and the DroidCam app (which works on iPhone too, apparently). Have you tried that?

https://techsparx.com/blogging/video/iphone-obs.html

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Re: iphone as usb webcam: but "no usb devices detected"

#7 Post by sunrat »

I was curious so did an internet search too, and came up with DroidCam as Frank suggested. I don't have an iphone but installed it on my Android. Then it needs the client installed on computer.
Instructions for client download and install are here - https://www.dev47apps.com/
It only takes a few terminal commands which you can copy and paste. The libappindicator packages mentioned are needed so install them.
I didn't try it with USB but over wifi. Just needed to start Droidcam on phone, open the client on computer and input the phone IP shown in the phone app and click Connect on the client. Then I opened Cheese and the phone camera image was showing albeit with a bit of lag.
Easy! :D
But a real webcam is easier. :mrgreen:

Youtube video showing setup - https://www.youtube.com/watch?v=nRXdvKP2cck
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Re: iphone as usb webcam: but "no usb devices detected"

#8 Post by quixote »

Thanks! Yes I did try Droidcam, but it didn't work for me. Since it's worked for others, I probably gave up too soon? Interesting idea to try it over wifi.

I didn't come across OBS in all my searches. I'll go have a look at that.

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