Difference between revisions of "Webcam setup"

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[[ru:Webcam setup]]
 
[[ru:Webcam setup]]
 
[[zh-hans:Webcam setup]]
 
[[zh-hans:Webcam setup]]
{{Accuracy|Several drivers in this article are available as built-in kernel modules, and shouldn't require special packages.}}
 
 
 
This is a guide to setting up your webcam in Arch Linux.
 
This is a guide to setting up your webcam in Arch Linux.
  
== Linux webcam support ==
+
Most probably your webcam will work out of the box. Permissions to access video devices (e.g. {{ic|/dev/video0}}) are handled by [[udev]], there is no configuration necessary.
 
 
Most probably your webcam will work out of the box. In that case you may skip to section [[#Webcam configuration]] if you want to configure color, brightness and other parameters. Otherwise follow the steps below.
 
 
 
== Identify your webcam ==
 
 
 
Identify the name of your webcam (using, for example, {{Ic|lsusb}}) and find a proper driver.  Below is a list of webcams, and what drivers they work with. If you get your webcam to work, add the name of the webcam and the driver you used to the list!
 
 
 
=== pwc ===
 
 
 
* Creative Labs Webcam Pro Ex
 
* Logitech QuickCam Notebook Pro (only the "Pro" models)
 
* Logitech Quickcam Pro 4000
 
* Philips ToUCams (not confirmed at the moment, but it is using the pwc driver if I remember correctly)
 
* Philips SPC900NC
 
* Philips (or NXP) PCVC690K
 
 
 
=== qc-usb ===
 
 
 
* Dexxa Webcam
 
* Labtec Webcam (old model)
 
* LegoCam
 
* Logitech Quickcam Express (old model)
 
* Logitech QuickCam Notebook (not the "Pro" models)
 
* Logitech Quickcam Web
 
 
 
=== qc-usb-messenger ===
 
 
 
* Logitech Quickcam Messenger
 
* Logitech Quickcam Communicate (for Communicate MP/S5500 or "for Business" see the linux-uvc section below)
 
 
 
{{Note|Now this driver is a module included in kernel 2.6.27.}}
 
 
 
=== zr364xx ===
 
 
 
 
 
This driver can be used for many webcams like:
 
* Aiptek PocketDV 3300
 
* Creative PC-CAM 880
 
* Konica Revio 2
 
* Genius Digital Camera
 
* Maxell Maxcam PRO DV3
 
You can find the full list of supported devices [http://royale.zerezo.com/zr364xx/ here].
 
 
 
=== sn9c102 ===
 
  
* Trust Spacecam series
+
== Loading ==
* Maxell Smartcam (for notebooks): 352x288 max. resolution @ 3fps
 
  
=== gspca ===
+
Identify the name of your webcam (using, for example, {{Ic|lsusb}}) and find a proper driver. See [https://www.linuxtv.org/wiki/index.php/Webcam_devices Webcam devices] for the details about drivers.
 
 
An extensive list of supported webcams is available [http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=Documentation/video4linux/gspca.txt;hb=HEAD].
 
 
 
=== stv680 ===
 
 
 
Many cheap no-name cameras that came out Asia in the last couple of years use the stv680 chipset. Most of these cameras were novelty items (i.e. Pencam, SpyC@m and LegoCam).  
 
* Aiptek PenCam series
 
* Digitaldream series
 
* Dolphin Peripherals series
 
* Lego LegoCam
 
* Trust SpyC@m series
 
* Welback Coolcam
 
 
 
A more-complete list of webcams that use the stv680 chipset is available [http://webcam-osx.sourceforge.net/cameras/index.php?orderBy=controller here].
 
 
 
=== linux-uvc ===
 
 
 
* Genius iLook 1321
 
* Logitech C922 Pro Stream Webcam
 
* Logitech  Webcam C170
 
* Logitech  Webcam C210
 
* Logitech  Webcam C250
 
* Logitech  Webcam C270
 
* Logitech  Webcam C600
 
* Logitech HD Webcam C525
 
* Logitech HD Pro Webcam C920
 
* Logitech Quickcam Pro 5000
 
* Logitech Quickcam Pro 9000
 
* Logitech Quickcam Orbit AF
 
* Logitech Quickcam Orbit MP
 
* Logitech Quickcam S5500
 
* Microdia Pavilion Webcam (on MSI PR200)
 
* Logitech Quickcam Communicate MP/S5500 or "for Business"
 
* Chicony Electronics CNF7051
 
 
 
You can find a full list of supported UVC devices [http://www.ideasonboard.org/uvc/ here].
 
 
 
As of kernel 2.6.26 linux-uvc is part of the kernel. Just load the uvcvideo module.
 
 
 
{{Note|
 
* With WebCam SCB-0385N (usb ID 2232:1005), WebCam SC-0311139N (usb ID 2232:1020) and WebCam SC-03FFL11939N (usb ID 2232:1028), you might need to add some configuration to the module if the usage of the camera makes the system freeze :
 
{{hc|1=/etc/modprobe.d/uvcvideo.conf|2=options uvcvideo nodrop=1}} }}
 
 
 
=== ov51x-jpeg ===
 
 
 
* Sony EyeToy
 
* Chicony DC-2120
 
* Chicony DC-2120 pro
 
* Trust Spacecam 320
 
* Hercules Webcam Deluxe
 
* Hercules Webcam Classic
 
* Creative Live! Cam Notebook Pro VF0400
 
* Creative Live! Cam Vista IM
 
* Creative Live! Cam Vista IM VF0420
 
* Creative Vista Webcam VF0330
 
* ASUS webcam Model?
 
* Philips PCVC820K/00
 
* NGS showtime plus
 
* HP VGA Webcam with Integrated Microphone
 
 
 
For me to get my "Creative Live! Cam Vista IM" working with Skype, I had to add this line to {{ic|/etc/modprobe.d/modprobe.conf}}:
 
options ov51x-jpeg forceblock=1
 
 
 
=== r5u870 (Ricoh) ===
 
 
 
* HP Pavilion Webcam
 
* HP Webcam 1000
 
* Sony VAIO VGP-VCCx
 
 
 
The Ricoh webcam is built into most new Sony laptops.
 
 
 
Install {{AUR|r5u87x-hg}}{{Broken package link|{{aur-mirror|r5u87x-hg}}}} (provides firmware too) and run the {{ic|r5u87x-loader}} command.
 
 
 
=== stk11xx (Syntek) ===
 
 
 
* Integrated camera in lot of Asus laptops
 
* Asus A8J, F3S, F5R, F5GL, F9E, VX2S, V1S, A6T
 
 
 
Just install {{AUR|stk11xx-svn}}. It contains the right kernel module.
 
 
 
== Make sure the module is loaded for your webcam ==
 
  
 
Add your webcam's [[kernel module]] in {{ic|/etc/modules-load.d/webcam.conf}} so it will be loaded into the kernel during init stage bootstrapping.
 
Add your webcam's [[kernel module]] in {{ic|/etc/modules-load.d/webcam.conf}} so it will be loaded into the kernel during init stage bootstrapping.
Line 154: Line 26:
 
</nowiki>}}
 
</nowiki>}}
  
== Permissions ==
+
== Configuration ==
 
 
Permissions to access video devices (e.g. {{ic|/dev/video0}}) are handled by [[udev]], there is no configuration necessary.
 
 
 
== Webcam configuration ==
 
 
 
If you want to configure brightness, color and other webcam parameters (e.g. in the case when out-of-the-box colors are too bluish/reddish/greenish) you may use [http://guvcview.sourceforge.net/ GTK+ UVC Viewer] (guvcview), available in the package  {{Pkg|guvcview}}. Just install it and launch, and it will present you a list of configurable settings. Changing these settings will affect all applications (e.g. Skype).
 
 
 
=== Webcam resolution ===
 
 
 
[[#Identify your webcam]], for example:
 
{{hc|$ lsusb|
 
Bus 001 Device 002: ID 5986:0241 Acer, Inc BisonCam, NB Pro
 
...
 
}}
 
 
 
Then use the {{ic|Bus}} and {{ic|Device}} numbers to get more information on that device:
 
 
 
{{hc|<nowiki>$ lsusb -s 001:002 -v | egrep "Width|Height"</nowiki>|
 
wWidth    640
 
wHeight  480
 
wWidth    1280
 
wHeight  1024
 
...
 
}}
 
 
 
Which should print the height, width pairs the camera is capable of - in this case, 1280x1024 plus some smaller ones.[http://askubuntu.com/questions/214977/how-can-i-find-out-the-supported-webcam-resolutions/214990#214990]
 
 
 
== Get software to use your webcam ==
 
 
 
Version 2.6.27 of the Linux kernel dropped support for the legacy Video4Linux (1) API.  Pixel format decoding has been pushed to user space, since Video4Linux version 2 does not support kernel space decoding.  The libv4l library provides userland applications with pixel decoding services and will be used by most programs.  Other compatibility layers are also available.
 
 
 
'''If your device is created but your image looks strange (e.g. nearly completely green), you probably need this.'''
 
 
 
If the application has V4L2 support but no pixelformat support then use the following command:
 
LD_PRELOAD=/usr/lib/libv4l/v4l2convert.so application
 
 
 
If the application only supports the older version of V4L, use this command:
 
LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so application
 
  
{{Tip|1=You also might want to put a line like the following into {{ic|/etc/profile}} or [[xprofile]] so you do not have to type that long command all the time:
+
If you want to configure brightness, color and other webcam parameters (e.g. in the case when out-of-the-box colors are too bluish/reddish/greenish) you may use '''Qt V4L2 Test Brench''' (''qv4l2''), available in the package {{Pkg|v4l-utils}}. Just install it and launch, and it will present you a list of configurable settings. Changing these settings will affect all applications.
{{bc|1=export LD_PRELOAD=/usr/lib/libv4l/v4l2convert.so}}
 
or
 
{{bc|1=export LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so}}
 
}}
 
  
For 32-bit [[multilib]] applications, install the {{Pkg|lib32-v4l-utils}} package and replace {{ic|/usr/lib/libv4l/}} by {{ic|/usr/lib32/libv4l/}} in the above commands.
+
== Applications ==
  
=== QtCAM ===
+
See also [[List of applications/Multimedia#Webcam]].
 
 
QtCAM is an Open Source Linux Webcam Software that enables users to capture/view videos/images from any USB camera or any V4L2 compatible device with attractive features such as Color space switching, Displaying Frame rates, over 10 image control settings and extension settings for select cameras. [[Install]] the package {{AUR|qtcam-git}}.
 
 
 
=== fswebcam ===
 
 
 
fswebcam is a tiny and flexible webcam app which can be called from the command line. [[Install]] the package {{AUR|fswebcam}}.
 
 
 
=== GTK+ UVC Viewer (guvcview) ===
 
 
 
In addition to being a convenient way to configure your webcam, [http://guvcview.sourceforge.net/ guvcview] also allows capturing (with sound!) and viewing video from devices supported by the Linux UVC driver. Available as package  {{Pkg|guvcview}}.  Just install it and launch, and it will present you a list of configurable settings. Changing these settings will affect all applications.
 
 
 
=== Kopete ===
 
 
 
Kopete is the [[KDE]] instant messaging (IM) client. [[Install]] it with the {{Pkg|kopete}} package.
 
 
 
=== Kamoso ===
 
 
 
Application to take pictures and videos out of your webcam for KDE. [[Install]] it with the {{Pkg|kamoso}} package.
 
  
 
=== xawtv ===
 
=== xawtv ===
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See [[FFmpeg#Recording webcam]].
 
See [[FFmpeg#Recording webcam]].
  
=== ekiga ===
+
== Troubleshooting ==
  
[[Install]] the {{pkg|ekiga}} package.
+
=== V4L1 support ===
The configuration druid will set everything up for you.
 
  
=== Motion ===
+
Version 2.6.27 of the Linux kernel dropped support for the legacy Video4Linux (1) API.  Pixel format decoding has been pushed to user space, since Video4Linux version 2 does not support kernel space decoding.  The libv4l library provides userland applications with pixel decoding services and will be used by most programs.  Other compatibility layers are also available.
  
:''Motion is a program that monitors the video signal from cameras. It is able to detect if a significant part of the picture has changed; in other words, it can detect motion.''
+
'''If your device is created but your image looks strange (e.g. nearly completely green), you probably need this.'''
  
[[Motion]] can only handle v4l2 devices so if you need to use a camera that only has v4l1 drivers you need to preload v4l1compat.so as previously mentioned. Otherwise you will get loads of errors about motion not able to find a suitable palette.
+
If the application has V4L2 support but no pixelformat support then use the following command:
 +
LD_PRELOAD=/usr/lib/libv4l/v4l2convert.so application
  
{{Tip|If you need to load webcams in order (i.e. get the /dev/video0..n device order) or set ownership or permissions, take a look at writing rules for [[Udev#Writing udev rules|writing udev rules]].}}
+
If the application only supports the older version of V4L, use this command:
 +
LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so application
  
=== MJPG-streamer ===
+
{{Tip|1=You also might want to put a line like the following into {{ic|/etc/profile}} or [[xprofile]] so you do not have to type that long command all the time:
 +
{{bc|1=export LD_PRELOAD=/usr/lib/libv4l/v4l2convert.so}}
 +
or
 +
{{bc|1=export LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so}}
 +
}}
  
{{AUR|mjpg-streamer}} takes JPGs from Linux-UVC compatible webcams, filesystem or other input plugins and streams them as M-JPEG via HTTP to webbrowsers, VLC and other software.
+
For 32-bit [[multilib]] applications, install the {{Pkg|lib32-v4l-utils}} package and replace {{ic|/usr/lib/libv4l/}} by {{ic|/usr/lib32/libv4l/}} in the above commands.
 
 
== Troubleshooting ==
 
  
=== Microsoft Lifecam Studio/Cinema===
+
=== Microsoft Lifecam Studio/Cinema ===
  
 
Under certain configurations, the Microsoft lifecam studio/cinema may request too much usb bandwidth and fail [http://www.ideasonboard.org/uvc/#footnote-13 see Uvcvideo FAQ]. In this case, change the buffering by loading the {{ic|uvcvideo}} driver with {{ic|1=quirks=0x80}}. Add it to {{ic|/etc/modprobe.d/uvcvideo.conf}} :
 
Under certain configurations, the Microsoft lifecam studio/cinema may request too much usb bandwidth and fail [http://www.ideasonboard.org/uvc/#footnote-13 see Uvcvideo FAQ]. In this case, change the buffering by loading the {{ic|uvcvideo}} driver with {{ic|1=quirks=0x80}}. Add it to {{ic|/etc/modprobe.d/uvcvideo.conf}} :

Revision as of 19:26, 17 May 2018

This is a guide to setting up your webcam in Arch Linux.

Most probably your webcam will work out of the box. Permissions to access video devices (e.g. /dev/video0) are handled by udev, there is no configuration necessary.

Loading

Identify the name of your webcam (using, for example, lsusb) and find a proper driver. See Webcam devices for the details about drivers.

Add your webcam's kernel module in /etc/modules-load.d/webcam.conf so it will be loaded into the kernel during init stage bootstrapping.

If your webcam is USB, the kernel should automatically load the proper driver. If this is the case, check dmesg after you plug your webcam in. You should see something like this:

$ dmesg|tail
sn9c102: V4L2 driver for SN9C10x PC Camera Controllers v1:1.24a
usb 1-1: SN9C10[12] PC Camera Controller detected (vid/pid 0x0C45/0x600D)
usb 1-1: PAS106B image sensor detected
usb 1-1: Initialization succeeded
usb 1-1: V4L2 device registered as /dev/video0
usb 1-1: Optional device control through 'sysfs' interface ready
usbcore: registered new driver sn9c102

Configuration

If you want to configure brightness, color and other webcam parameters (e.g. in the case when out-of-the-box colors are too bluish/reddish/greenish) you may use Qt V4L2 Test Brench (qv4l2), available in the package v4l-utils. Just install it and launch, and it will present you a list of configurable settings. Changing these settings will affect all applications.

Applications

See also List of applications/Multimedia#Webcam.

xawtv

This is a basic v4l device viewer, and although it is intended for use with TV tuner cards, it works well with webcams. It will display what your webcam sees in a window. Install it (xawtv) and run it with:

$ xawtv -c /dev/video0

If you are using an nVidia graphic card, and you get an error like

X Error of failed request:  XF86DGANoDirectVideoMode
 Major opcode of failed request:  139 (XFree86-DGA)
 Minor opcode of failed request:  1 (XF86DGAGetVideoLL)
 Serial number of failed request:  69
 Current serial number in output stream:  69

you should instead run it as:

$ xawtv -nodga

VLC

VLC can also be used to view and record your webcam. In VLC's "Media" menu, open the 'Capture Device...' dialog and enter the video and audio device files. Or from the command line, do:

$ vlc v4l:// :v4l-vdev="/dev/video0" :v4l-adev="/dev/audio2"

This will make VLC mirror your webcam. To take stills, simply choose 'Snapshot' in the 'Video' menu. To record the stream, you add a --sout argument, e.g.

$ vlc v4l:// :v4l-vdev="/dev/video0" :v4l-adev="/dev/audio2" \ 
  --sout "#transcode{vcodec=mp1v,vb=1024,scale=1,acodec=mpga,ab=192,channels=2}:duplicate{dst=std{access=file,mux=mpeg1,dst=/tmp/test.mpg}}"

(Obviously a bit overkill with regard to the bit rates but it is fine for testing purposes.) Notice that this will not produce a mirror on the display - in order to see what you are recording, you would need to add the display as a destination to the argument:

... :duplicate{dst=display,dst=std{access= ....

(Though this can tax older hardware somewhat...)

MPlayer

To use MPlayer to take snapshots from your webcam run this command from the terminal:

$ mplayer tv:// -tv driver=v4l2:width=640:height=480:device=/dev/video0 -fps 15 -vf screenshot

From here you have to press s to take the snapshot. The snapshot will be saved in your current folder as shotXXXX.png. If you want to record continuous video:

$ mencoder tv:// -tv driver=v4l2:width=640:height=480:device=/dev/video0:forceaudio:adevice=/dev/dsp -ovc lavc -oac mp3lame -lameopts cbr:br=64:mode=3 -o filename.avi

Press Ctrl+c to end the recording.

mpv

To use mpv to take snapshots from your webcam run this command from the terminal:

$ mpv av://v4l2:/dev/video0

From here you have to press s to take the snapshot. The snapshot will be saved in your current folder as mpv-shotNNNN.jpg.

FFmpeg

See FFmpeg#Recording webcam.

Troubleshooting

V4L1 support

Version 2.6.27 of the Linux kernel dropped support for the legacy Video4Linux (1) API. Pixel format decoding has been pushed to user space, since Video4Linux version 2 does not support kernel space decoding. The libv4l library provides userland applications with pixel decoding services and will be used by most programs. Other compatibility layers are also available.

If your device is created but your image looks strange (e.g. nearly completely green), you probably need this.

If the application has V4L2 support but no pixelformat support then use the following command:

LD_PRELOAD=/usr/lib/libv4l/v4l2convert.so application

If the application only supports the older version of V4L, use this command:

LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so application
Tip: You also might want to put a line like the following into /etc/profile or xprofile so you do not have to type that long command all the time:
export LD_PRELOAD=/usr/lib/libv4l/v4l2convert.so

or

export LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so

For 32-bit multilib applications, install the lib32-v4l-utils package and replace /usr/lib/libv4l/ by /usr/lib32/libv4l/ in the above commands.

Microsoft Lifecam Studio/Cinema

Under certain configurations, the Microsoft lifecam studio/cinema may request too much usb bandwidth and fail see Uvcvideo FAQ. In this case, change the buffering by loading the uvcvideo driver with quirks=0x80. Add it to /etc/modprobe.d/uvcvideo.conf :

/etc/modprobe.d/uvcvideo.conf
## fix bandwidth issue for lifecam studio/cinema
options uvcvideo quirks=0x80
Note: If delays are visible in the logs, or the camera works periodically, this workaround should apply generally. Bigger values such as quirks=0x100 are possible.

Check bandwidth used by USB webcams

When running multiple webcams on a single USB bus, they may saturate the bandwidth of the USB bus and not work properly. You can diagnose this with the usbtop tool from the usbtopAUR package.