boltgolt
cap_v4l.cpp:1973 controlInfo VIDEOIO(V4L2:/dev/video0): property unknown is not supported
I'm rather new to linux and just got a new linux laptop, Fedora 38 is installed on it. After a flawless install using sudo dnf copr enable luya/howdy sudo dnf install howdy
I added v4l-utils.
Then v4l2-ctl --list-devices
Chicony USB2.0 Camera: Chicony (usb-0000:00:14.0-7):
/dev/video0
/dev/video1
/dev/media0
I then edited howdy's config file through sudo howdy config and added the camera path:
device_path = /dev/video0
Then I added my face via sudo howdy add 3 times just to be sure. And I did see the little light beside the camera go on as it took the snapshots
However, it just won't work
a sudo -i will only prompt me to type in my password, so did rebooting.
I did a sudo howdy test and got the title of the post(a windows with the camera livestream would open during the test, seemed to work just fine): cap_v4l.cpp:1973 controlInfo VIDEOIO(V4L2:/dev/video0): property unknown is not supported
I also tried different recording plugins but to no avail (ffmpeg and pyv4l2). Test couldn't be done with those though as it wouldn't let me
I did find a similar issue : https://github.com/boltgolt/howdy/issues/800
However, the solution of user tokox as described in https://github.com/boltgolt/howdy/issues/801 consisting in creating a new directory : sudo mkdir /usr/lib64/security/howdy/snapshot didn't work for me.
And so here I am, any help would be greatly appreciated, a copy of my config file in txt format is attached is attached below
Linux distribution: Fedora 38
Howdy version 2.6.1 config.txt
cap_v4l.cpp:1973 controlInfo VIDEOIO(V4L2:/dev/video0): property unknown is not supported
This is not the issue, so please rename it. I have same thing and everything works. And as you could see ↓, issue #800 was really issue #801, and these property unknown things were unrelated.
Thank you @tokox That was the solution for me too.
Did you use this script after installation, or did this thing manually? You have to add howdy to pam and configure selinux, otherwise howdy won't even be started on login/sudo.
Solution of creating new directory was only to exception when Unknown error: 1 was showing and in journalctl there was detected unhandled Python exception in '/lib64/security/howdy/compare.py'. (And maybe you will have to do it after fixing this one)
Same here, Fedora 38, two cameras (normal and IR), same output for both. Window opens and even adding a model works just fine, but it would always encounter an error.
sudo -i does turn on the IR webcam, but outputs Unknown error: 1 and stops.
Output from test:
[ INFO:[email protected]] global registry.impl.hpp:114 UIBackendRegistry UI: Enabled backends(3, sorted by priority): GTK(1000); GTK3(990); GTK2(980) + BUILTIN(QT5)
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
[ INFO:[email protected]] global registry_parallel.impl.hpp:96 ParallelBackendRegistry core(parallel): Enabled backends(2, sorted by priority): TBB(1000); OPENMP(990)
[ INFO:[email protected]] global parallel_for.tbb.hpp:54 ParallelForBackend Initializing TBB parallel backend: TBB_INTERFACE_VERSION=11103
[ INFO:[email protected]] global parallel.cpp:77 createParallelForAPI core(parallel): using backend: TBB (priority=1000)
[ INFO:[email protected]] global cap_v4l.cpp:1973 controlInfo VIDEOIO(V4L2:/dev/video2): property unknown is not supported
P.S. Runned ConfigHowdy.sh, then added my webcam manually through sudo howdy config.
UPD. journalctl -e does the job. Error #801 relations again. Fixed. Working.
TL;DR: Running an sh script above and watching through logs if thats a compare.py error does the deal on this error.
