udev and a rule similar to this:
ENV{SUBSYSTEM}=="video4linux", ENV{ID_TYPE}=="video",
ENV{ID_SERIAL_SHORT}=="0582C6D0", SYMLINK+="video-ibm2", GROUP="video"
ENV{SUBSYSTEM}=="video4linux", ENV{ID_TYPE}=="video",
ENV{ID_SERIAL_SHORT}=="A6D77E9F", SYMLINK+="video-pr1", GROUP="video"
ENV{SUBSYSTEM}=="video4linux", ENV{ID_TYPE}=="video",
ENV{ID_SERIAL_SHORT}=="9EAC29D0", SYMLINK+="video-pr2", GROUP="video"I don't know if that rule still works,I last used it 8 years ago. But something similar should still work. And at least the logitech cams do seem to have a serial number. udevadm info /dev/video0 will dump the info. If you want to be avoid udev, you could use the SN from the info command and create another device in /dev with the name you want and the same major/minor number (using the mknod command) (major/minor is in the info command). Say start at /dev/video20 or something similar. udev is the clean way to do it, but udev is more difficult to debug if it does not work, and I have been burned by udev changing semantics enough to do it the crude but easier to debug way. On Tue, Mar 22, 2022 at 12:33 PM Steve Underwood <coppic...@gmail.com> wrote: > Hi, > > The Linux UVC driver for USB video cameras names devices according to > the product name it gets from the USB device itself. This is fine if you > have different models of camera, as each gets a different name. However, > if you have, say, 3 Logitech C920 cameras, the device list in video > applications shows you have many devices called "HD Pro Webcam C920", > and you can't tell which is which. I looked in the driver source code to > see if there is a way to tag the cameras with unique names, but there > doesn't seem to be. Does anyone know if I missed something? > > Regards, > > Steve > _______________________________________________ > users mailing list -- users@lists.fedoraproject.org > To unsubscribe send an email to users-le...@lists.fedoraproject.org > Fedora Code of Conduct: > https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: > https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org > Do not reply to spam on the list, report it: > https://pagure.io/fedora-infrastructure >
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