MULTICAM with 2 identical logitech cameras

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1

Camera model

LOGITECH QUICKCAM

What is the problem?

I'm trying to install two logitech quickcam . If I set the first one (wedcam2.txt) up with port 8081 and the second (webcam3.txt) with port 8082 the second doesn't work, but if I unplug webcam2 and reboot webcam3 works but on the webcam2 button

What did you already try to solve it?

the line of code i've changed in ssh
WEBCAM2.txt
camera="usb"
camera_usb_options="-r 640x480 -f 10 -d /dev/v4l/by-id/usb-046d_0991_803151F5-video-index0"
camera_http_options="-n -p 8081"
WEBCAM3.txt
camera="usb"
camera_usb_options="-r 640x480 -f 10 -d /dev/v4l/by-id/usb-046d_0991_803151F5-video-index0"
camera_http_options="-n -p 8082"

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Did running in safe mode solve the problem?

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2

Hi,

I have encountered the same problem.
Instead of using: /dev/v4l/by-id in the path, use: /dev/v4l/by-path

To do this, start by listing your hardware as follows:
ls /dev/v4l/by-path

ls /dev/v4l/by-path

platform-bcm2835-codec-video-index0
platform-bcm2835-isp-video-index0
platform-bcm2835-isp-video-index1
platform-bcm2835-isp-video-index2
platform-bcm2835-isp-video-index3
platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.2:1.0-video-index0
platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.2:1.0-video-index1
platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.3:1.0-video-index0
platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.3:1.0-video-index1

Usb cameras can be identified :

  • platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.2:1.0-video-index0
  • platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.2:1.0-video-index1
  • platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.3:1.0-video-index0
  • platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.3:1.0-video-index1

Use device paths ending in "-video-index0".

Edit your configuration files webcam2, webcam3, ...
And use the paths you've previously copied.
Don't forget to add "/dev/v4l/by-path/" before, and the -d parameter.

Configuration example for my webcam2 configuration file:

camera="usb"
camera_usb_options="-r 1920x1080 -f 10 -d /dev/v4l/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.3:1.0-video-index0"

After modifying your various configuration files, reboot your pi

sudo reboot -n

I hope this solves your problem. It worked for me.

Enjoy !

Here is the topic where my problem was discussed:
https://community.octoprint.org/t/impossible-to-operate-two-identical-cameras-solved/52803

You can also try the script provided by @paukstelis (See the content of the discussion thread - link above)

(Thanks to @paukstelis for the help)