Questions tagged [camera]
A photo or video device that's typically tethered to the computer via a standard bus such as USB.
267
questions
0
votes
0
answers
17
views
mic boost for kazer kiyo?
I'm setting a new webcam, a razer kiyo, and I'm having some trouble with the microphone. It works, but it's really quiet. The "mic boost" option in alsamixer would seem to be a good choice, ...
- 51
0
votes
0
answers
22
views
Integerated Webcam not working in Debian 12
I moved to Debian 12 from Linux Mint last year, recently I noticed that my laptop's integrated webcam isn't working. It was working fine in Linux Mint.
Debian isn't detecting integrated webcam.
...
- 1
0
votes
0
answers
27
views
Cannot start link in /dev with LD_PRELOAD and ffmpeg
I successfully start ffmpeg on my old webcam with:
ssh my_host "LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libv4l/v4l2convert.so ffmpeg -f video4linux2 -i /dev/video0 -f matroska -" | mplayer - -...
- 11
0
votes
1
answer
50
views
How can install and load mods related to videodev and others?
Same hardware,two debian-11.7 installed in the same pc ,one is on /dev/sda1,other is on /dev/ada2.
For the debian on /dev/sda1:
uname -a
Linux debian 5.10.0-22-amd64 #1 SMP Debian 5.10.178-3 (2023-04-...
- 197
0
votes
0
answers
42
views
V4L buffer doesn't get cleaned properly
I've been trying to write a c program to capture photos from a uvc camera using v4l. I've managed to gt it to work for the most part but every second time i run the program i get a zero-filled yuv ...
- 3
0
votes
0
answers
45
views
Webcam keeps on disconnecting and reconnecting
I am on Debian unstable with swaywm. I could also reproduce the same issue on i3.
On running sudo dmesg after launching cheese, I get this.
After the initial run, cheese straightaway goes into a dark ...
- 71
0
votes
0
answers
378
views
Integrated webcam /dev/video0 sends no data
The integrated webcam on my machine is detected (/dev/video0 exists and the webcam led turns on when an client app starts using it (e.g. cheese, ffplay etc). Most application sends errors about the ...
- 101
0
votes
0
answers
41
views
How to zoom a webcam in KDE Plasma 5 on openSUSE Tumbleweed?
I have a Schenker XMG U706 notebook which has a BisonCam NB Pro cam in it. I remember when having used Zoom (What a coincidende in naming! :) under (dual boot) Windows I could zoom in/out the video. ...
- 265
0
votes
0
answers
56
views
libcamera: Preview windows only support YUV420
I have a USB camera connected to a CM4 and I want to output the video through HDMI. I'm using a custom kernel from buildroot.
I'd like to use libcamera or something similar to avoid needing a desktop ...
- 1
0
votes
0
answers
83
views
Webcam showing image with circular artifacts
What could have caused the issue where the built-in webcam in my laptop captures a video stream with weird graphical artifacts?
These artifacts randomly appear or disappear for some period without any ...
- 101
6
votes
2
answers
3k
views
Why would `lsof /dev/video0` be insufficient to check what processes are using the camera?
A question about this command from half a decade ago claims that lsof does not monitor all the processes using cam. But when I ran the command while running testcam I got:
COMMAND PID USER FD ...
- 69
1
vote
1
answer
81
views
How to recover VOB video files in camcoder dvd with udf filesystem which appears empty but it's not
I recently discovered some old double-sided mini dvd-rw disks (2.8GB) which were used for recording video with a Sony DCR-DVD201E handycam. Both sides already had content but they were unfinalized so ...
- 631
1
vote
1
answer
307
views
How can I persist the modified V4L2 (Guvcview) profile of a webcam?
I have a USB web camera that gives suboptimal results when I plug it in (Linux seems to apply its own V4L2 settings to it that it thinks are best, they are not). Mainly, it operates at a low FPS. But ...
- 11
0
votes
0
answers
98
views
v4l2 Cannot recognize MPEG-4 as an input_format for ffmpeg processing
I'm on an old version of ubuntu (12.0.4) that cannot be updated / not possible to connect to internet. It comes with a bluecherry encoding compression card
https://www.bluecherrydvr.com/product/...
1
vote
1
answer
149
views
Hello windows camera as a web camera on Linux | Philips 272s1mh/00
I recently bought a Philips 272s1mh/00 27" monitor with the idea of using it as an additional monitor for my work HP laptop with Windows 11 pro and at the same time for my Dell Vostro laptop with ...
- 13
0
votes
0
answers
135
views
Elgato Facecam & v4l2 vertical/horizontal flip
Question for somebody who owns this Elgato webcam model. Does it support vflip and hflip using v4l2?
- 121
0
votes
0
answers
332
views
Integrated camera stopped working/being detected on Debian 11 Lenovo thinkpad 4th gen
I have a lenovo thinkpad X1 carbon 4th gen that was working fine for several years, on Debian 11, but the integrated camera suddenly stopped working. It is enabled in the bios, just not detected ...
- 1
0
votes
0
answers
53
views
So, what issue i have is my camera is connected but its not showing when i do lsusb and I really don't get what is the issue
ase) caiedge@caiedge-Precision-3650-Tower:~$ dmesg | grep usb
[ 0.819578] usbcore: registered new interface driver usbfs
[ 0.819578] usbcore: registered new interface driver hub
[ 0.819578] ...
0
votes
0
answers
114
views
Internal webcamera with hi847 sensor doesn't work on alder lake
I have dualboot system with Windows 11 and Ubuntu 22.10. Notebook based on intel Alder Lake platform with i5 1230u processor. Internal WebCamera (HI847) sensor doesn't work in Ubuntu, but works in ...
0
votes
0
answers
63
views
How many webcam devices in my os?
I have only one usb-camera device connected to my pc.
lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device ...
- 205
1
vote
1
answer
172
views
How can I flash an embedded device with new linux software?
I have this IP camera that I bought that's really pretty shady (it streams all the videos to some S3 bucket and forces me to use their software), but I'm pretty sure it runs embedded linux and I'm ...
- 465
0
votes
0
answers
339
views
Guvcview can't choose camera Gnome 43 Ubuntu 22.10
System Ubuntu 22.10 and Gnome 43.
In guvcview v2.0.8 there's not a menu to choose video source. On laptop it uses front camera on the lid.
The only way to use an USB UVC camera or microscope is to run ...
- 26
1
vote
0
answers
238
views
Webcam's power line frequency setting does not take effect if a new application that uses it is open
I am living in Europe and I have bought a Logitech C920 webcam whose power line frequency setting should be changed to 50Hz in order to avoid flickering. I did it using the following instruction:
/usr/...
0
votes
0
answers
57
views
Webcam "warmup": first black then working fine
I've got a "Microdia AUKEY PC-LM3" webcam that exhibits some strange behavior that I can't explain when used with Linux. When the webcam is activated (e.g. a video call is started), its LEDs ...
- 101
0
votes
0
answers
2k
views
Integrated webcam not working Ubuntu 22.04 getting error uvcvideo 1-6:1.1: Failed to resubmit video URB (-19)
It is a lenovo ideapad dual boot system with Ubuntu and Kali. Webcam is not accessible, it is showing blank, the light blips and goes off. Tried it with Cheese, browsers, guvcview, zoom and teams. It ...
- 1
0
votes
0
answers
176
views
Webcam not working properly (wrong resolution)
Since a while, I haven't been able to get the correct resolution of my laptop's integrated webcam. The laptop model is a Thinkpad T495, I'm using Debian testing, and the kernel is 6.0.0-2-amd64.
The ...
- 1
4
votes
2
answers
953
views
Disable webcam at boot time, by appending a boot parameter
I have an internal webcam on my Dell laptop. I don't see it listed with lspci, but it works.
I am using a self-compiled kernel, and here are the options I have enabled:
# zcat /proc/config.gz | grep -...
- 483
0
votes
1
answer
1k
views
integrated camera not detected/working on Acer Nitro 5 AN515-58
The integrated camera is not detected/working.
Cheese says No device found.
Guvcview says
Guvcview error
no video device (/dev/video0) found
I have dual boot with Windows 10 and the camera works ...
- 13
1
vote
0
answers
26
views
How to make Camera Image blank on Linux Fedora While used
Hello this is probably crazy question, my aim is to disable the video capture after I press a button and run script, and it already works, the problem is it only works when the camera isn't used. If ...
- 111
1
vote
1
answer
1k
views
My camera is being detected as a generic USB device, but not as a camera - how do I force /dev/videoX to be created?
EDIT: I added some additional information from sudo lsusb and sudo dmesg as recommended by telcoM below. I have one camera that works and a similar camera from the same manufacturer that doesn't work ...
- 111
1
vote
1
answer
176
views
Built in Camera Not Detected Lenovo P14 AMD
I am using Garuda Linux with Qtile Window Manager on a Lenovo P14 AMD laptop and cannot get the built in camera to function. I have tried Cheese and various websites(Jitsi, Google Hangouts etc) and it ...
- 11
3
votes
1
answer
476
views
How to disable the microphone of a Logitech BRIO webcam under Linux?
I have a Logitech BRIO webcam, which has a microphone that I never use. To avoid confusion, I would like to disable it on the lowest possible level. Can I somehow tell Linux to never load the driver ...
- 741
0
votes
1
answer
158
views
Can "v4l2loopback" be installed/compiled for FreeBSD 13.1?
Wondering if anyone was able to compile v4l2loopback for FreeBSD 13.1
If so what are the steps.
I need it for FFMPEG to convert a live USB cam MJPEG video stream from yuv422 to yuv420 on the fly and ...
- 51
1
vote
0
answers
561
views
HP TrueVision HD Camera - Cheese show black screen
I have a HP laptop with Ubuntu 22.04 with a built in Truevision camera.
When running cheesethe LED indicator next to camera lights up but the screen is black. The buttons in cheese is disabled. ...
- 2,880
0
votes
1
answer
192
views
Qubes OS does not see the laptop camera
Qubes Devices does not see the camera, only the microphone. If I type lsusb the camera is visible:
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 Root Hub
Bus 003 Device 003: ID 1358:c123 ...
- 41
0
votes
1
answer
273
views
Is my webcam hacked?
Linux (ubuntu) user here. I have been using Linux for a long time, which makes me comfortable with the command line. So, I am looking for suggestions and tools to help me solve this problem. In case ...
5
votes
0
answers
1k
views
No /dev/video* in Arch Linux on Dell XPS 13 Plus (9320)
I finally got the new Dell XPS Plus, I've installed Arch Linux (with Xfce4) but it seems like that are no recognizable webcams or video devices, even though the laptop has a built-in one + IR camera.
...
- 203
1
vote
0
answers
965
views
Intermittent issue with Logitech Webcam C270 on Pop OS 22.04 - UVC Camera (046d:0825)
I seem to have issues with my webcam on Pop OS 22.04 and on LMDE 4. I was using the same device flawlessly on Xubuntu 18.04.
When trying to use the camera with cheese or guvcview I often get a white ...
0
votes
2
answers
584
views
V4L2: Why image taken with shortest exposure-time looks way too brighter than auto-exposure mode?
When capturing image using the default auto-exposure-mode:
$ v4l2-ctl -d0 --set-fmt-video=width=width,height=height,pixelformat=MJPG --stream-mmap --stream-to=auto_expo.jpg --stream-count=1
auto_expo....
- 510
0
votes
3
answers
10k
views
usbip: error: Attach Request for <busid> failed - Device busy (exported)
I have attached and detached my USB webcam to/from Ubuntu 20.04 in WSL2 with usbipd-win using the instructions in Connect USB Devices. From PowerShell:
usbipd wsl attach --busid 2-4
Once I'm done, I ...
- 11
1
vote
1
answer
1k
views
Motion doesn't detected my webcam : UNABLE TO OPEN VIDEO DEVICE
I would use a USB webcam with Motion software, installed in Ubuntu on my Windows PC (WSL2 ) But when I started Motion as a service and i check on browser at the address [LOCALHOLST:port 8080 or 8081 ] ...
- 11
1
vote
0
answers
876
views
Raspberry Pi 4 doesn't show USB camera as ttyUSB
I have an RPi camera and a USB camera connected to my RPi4.
lsusb:
pi@raspberrypi:~ $ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 0c45:636b Microdia
...
- 111
2
votes
1
answer
1k
views
How to stream the linux framebuffer as video over http
I have an embedded linux system (yocto based) with a framebuffer UI (no X11) and a running web server.
Now I'm asking how to "mirror" the screen contents to a web page. Think of it like a ...
- 13.4k
2
votes
0
answers
2k
views
How to receive "v4l2-ctl --stream-to-host" stream from a machine on the same LAN on said host for use with, e.g., video conferencing software?
There is an example that streams a webcam to another computer by piping a V4L2 stream into netcat (v4l2-ctl --stream-to - | nc <host> <port>), and this works, but it feels redundant when ...
- 121
1
vote
1
answer
175
views
dummy_hcd loopback webcam. Impossible?
I've been trying to create a loopback USB Webcam device with the help of dummy_hcd kernel module on my Raspberry PI 2B. Steps I've taken:
I load libcomposite via modprobe libcomposite.
Then I load ...
- 141
1
vote
0
answers
500
views
Webcam not working
My USB Webcam was working about a week ago, before I updated from 5.13 to 5.16. After the update my USB Webcam is no longer working. I don't know what I did.
0
votes
1
answer
185
views
V4L2 Webcam has weird colours in Motion stream, normal on VLC
I've set up a webcam stream with Motion to use with Octoprint on my Raspberry Pi 4 (Raspbian 10). With my main webcam (Logitech C270) it works well as expected.
I was testing to see if I could use a ...
- 1
0
votes
1
answer
569
views
WebCamoid Chorma-Key Green Screen Background Image Settings
Can somebody please provide directions on HOW to set up WebCamoid to use a ChromaKey Green Screen to add a virtual background to my virtual camera? I have WebCamoid installed on MacOS Mojave 10.14 but ...
0
votes
0
answers
2k
views
Cheese (Camera) is not working in Ubuntu 20.04 on my Corei7 11th Gen(Lenovo Thinkbook)
My camera was working properly yesterday, but all of sudden it stopped working next day. I can only see the black screen as below:
My system details are:
I've tried all the other solutions like ...
- 1
0
votes
1
answer
829
views
How to know the V4L2 camera's exposure time in ms?
with v4l2-ctl, one can know camera-parameters with following:
$ v4l2-ctl -d2 --list-ctrls
brightness 0x00980900 (int) : min=0 max=255 step=1 default=128 value=128
...
- 510