A photo or video device that's typically tethered to the computer via a standard bus such as USB.
Use should be limited to questions regarding the configuration, setup, and operation of a tethered image capture device.
Questions tagged [camera]
267 questions
33
votes
2 answers
Multiple /dev/video for one physical device
First some specs: my computer is an HP EliteBook 8460p. It comes with an integrated Chicony HP HD webcam.
My issue is that a lot of applications (well, at least Skype and guvcview) are displaying multiple lines for the same webcam; indeed, if I do…
kagmole
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31
votes
3 answers
How do I find out which process is using my V4L2 webcam?
I tried to run the following:
$ vlc -I dummy v4l2:///dev/video0 --video-filter scene --no-audio --scene-path webcam.png --scene-prefix image_prefix --scene-format png vlc://quit --run-time=1
VLC…
Turion
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28
votes
2 answers
How to manage the white balance in webcam
On Linux my webcam works fine, but when using artificial lighting the white-balance is too reddish. Color look fine with natural illumination.
Is there a way to calibrate the colors or have some form of auto-adjustment which works?
I used guvcview…
To Do
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25
votes
3 answers
How to know if my webcam is used or not?
Which command allows me to know if my webcam is used or not?
lsof /dev/video0 is not sufficient. All block devices with major and minor number 81 and 0 should be monitored.
user123456
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19
votes
2 answers
Webcam effects on Linux
With sudden working from home, video conferencing is all the rage, and many of the more fun features are only built-in to the Windows clients, such as background blur, changing background images, filters, turning yourself into a potato, etc. I…
Karl Bielefeldt
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16
votes
2 answers
Understanding webcam 's Linux device drivers
As far as I know, device driver is a part of SW that is able to communicate with a particular type of device that is attached to a computer.
In case of a USB webcam, the responsible driver is UVC that supports any UVC compliant device. This means…
dempap
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13
votes
4 answers
How to blur webcam background in Microsoft Teams
I am currently using Teams for a master and I would like to blur my backgrounds, do you know any way to do it?
Alessio_110
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13
votes
2 answers
Rotate webcam as well as screen (portrait mode)
TL;DR: Is it possible to rotate by 90 degrees the feed of a built-in screen webcam?
I have 2 screen monitors, one in landscape and one in portrait mode. The webcam is on the "portrait" monitor, the "landscape" monitor doesn't have a rotation…
raphaelfournier
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11
votes
1 answer
Why can multiple consumers access a *single* v4l2-loopback stream from a webcam
I recently needed a single webcam to be shared simultaneously by 3 applications (a web browser, a videoconferencing app, and ffmpeg to save the stream).
It's not possible to simply share the /dev/video* stream because as soon as one application is…
justyn
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10
votes
2 answers
Deny flash plugin access to (a particular) webcam
I recently bought an external webcam to play around with OpenCV. It works great out of the box in Debian, but I realized that when I browse any site that contain flash content (youtube, soundcloud), the activity LED on the webcam flashes and in that…
nietaki
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10
votes
1 answer
Taking a picture with a laptop webcam after entering an incorrect password
I'd like to set up my laptop so that if a wrong password is entered when the screen is locked, a picture is taken using the laptop's webcam. I examined xlock (from xlockmore package), but there is no option to run a customized action when a wrong…
Petr
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10
votes
2 answers
How to connect to a Sony camera via Wifi from Linux
Sony cameras come with Wifi connectivity, but their software is only distributed for Mac and Windows. (www.sony.net/pm/)
How can I connect to it from Linux? (Specifically, Fedora 22 <--> DSC-HX60)
When I enable the Wifi push, the camera tells me I…
Cyril Graze
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8
votes
4 answers
Trouble getting VLC to record from the webcam via command line
my ~/.bashrc contains the following function
webcamrecord () {
vlc v4l2:// :v4l-vdev="/dev/video0" :v4l-adev="/dev/audio2" :v4l-norm=3 :v4l-frequency=-1 :v4l-caching=300 :v4l-chroma="" :v4l-fps=-1.000000 :v4l-samplerate=44100 :v4l-channel=0…
ixtmixilix
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8
votes
1 answer
How to create dummy webcam?
I would like to join some videoconference, but I don't own a webcam and the conference software requires one.
So my question is, can I create a dummy one? I don't care what the cam will cast, I just need to appear to have one.
Pitel
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7
votes
1 answer
Can the focus of a Microsoft LifeCam HD-5000 be fixed at infinity under linux?
I have two Microsoft LifeCam HD-5000 webcams which I am using as a home security system with the Motion package for linux. One problem I have is that because these webcams have auto-focus, sometimes they will try to automatically adjust the focus…
Josh
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