Webcam - Revision history

Leo: /* Disable auto focus */

2020-10-08T16:06:26Z

Disable auto focus

← Older revision		Revision as of 16:06, 8 October 2020
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	== Linux ==		==Linux==
	To get a webcam working for Linux, ensure that it's supported. Newer webcams tend to have support though cheaper non-HD webcams from China might not. You should see a {{code\|/dev/video0}} device when the webcam is plugged into the computer. If not, check {{code\|dmesg}} and see if the USB device is being detected. {{code\|lsusb}} should also list it.		To get a webcam working for Linux, ensure that it's supported. Newer webcams tend to have support though cheaper non-HD webcams from China might not. You should see a {{code\|/dev/video0}} device when the webcam is plugged into the computer. If not, check {{code\|dmesg}} and see if the USB device is being detected. {{code\|lsusb}} should also list it.

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	~~===~~ Capturing Utilities/Daemons ~~===~~		Capturing Utilities/Daemons

	To capture images, use any one of the following utilities:		To capture images, use any one of the following utilities:
	* [[motion]]
	* [[fswebcam]]		*[[motion]]
	* uvccapture		*[[fswebcam]]
			*uvccapture

	My Raspberry Pis use [[motion]] to automatically capture snapshots periodically to a NFS share.		My Raspberry Pis use [[motion]] to automatically capture snapshots periodically to a NFS share.

	=== Configuration ===		===Configuration===
	You may configure the webcam settings using {{code\|v4l-utils}}.		You may configure the webcam settings using {{code\|v4l-utils}}.

	See Also:		See Also:
	* http://www.techytalk.info/webcam-settings-control-ubuntu-fedora-linux-operating-system-cli/

			*http://www.techytalk.info/webcam-settings-control-ubuntu-fedora-linux-operating-system-cli/

			=== Tasks ===

	{{Navbox Linux}}[[Category:Linux]]		==== Disable Auto Focus ====
			<code>v4l2-ctl</code> shows all the settings that are currently set:
			{{Highlight
			\| code = # v4l2-ctl -l
			brightness 0x00980900 (int) : min=30 max=255 step=1 default=133 value=133
			contrast 0x00980901 (int) : min=0 max=10 step=1 default=5 value=5
			saturation 0x00980902 (int) : min=0 max=200 step=1 default=103 value=103
			white_balance_temperature_auto 0x0098090c (bool) : default=1 value=1
			power_line_frequency 0x00980918 (menu) : min=0 max=2 default=2 value=2
			white_balance_temperature 0x0098091a (int) : min=2500 max=10000 step=1 default=4500 value=4500 flags=inactive
			sharpness 0x0098091b (int) : min=0 max=50 step=1 default=25 value=25
			backlight_compensation 0x0098091c (int) : min=0 max=10 step=1 default=0 value=0
			exposure_auto 0x009a0901 (menu) : min=0 max=3 default=3 value=3
			exposure_absolute 0x009a0902 (int) : min=1 max=10000 step=1 default=156 value=156 flags=inactive
			pan_absolute 0x009a0908 (int) : min=-529200 max=529200 step=3600 default=0 value=0
			tilt_absolute 0x009a0909 (int) : min=-432000 max=432000 step=3600 default=0 value=0
			focus_absolute 0x009a090a (int) : min=0 max=15 step=1 default=2 value=5 flags=inactive
			focus_auto 0x009a090c (bool) : default=1 value=1
			zoom_absolute 0x009a090d (int) : min=0 max=317 step=1 default=0 value=0
			\| lang = terminal
			}}
			To disable auto focus, set the <code>focus_auto</code> setting to 0.
			{{Highlight
			\| code = # v4l2-ctl -l{{!}}grep focus_auto
			focus_absolute 0x009a090a (int) : min=0 max=15 step=1 default=2 value=5 flags=inactive
			focus_auto 0x009a090c (bool) : default=1 value=1
			# v4l2-ctl -c focus_auto=0
			\| lang = terminal
			}}{{Navbox Linux}}
			[[Category:Linux]]

Leo: Text replacement - "Category:Linux{{Navbox Linux}}" to "{{Navbox Linux}}Category:Linux"

2019-09-01T06:22:00Z

Text replacement - "Category:Linux{{Navbox Linux}}" to "{{Navbox Linux}}Category:Linux"

← Older revision		Revision as of 06:22, 1 September 2019
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	[[Category:Linux]]~~{{Navbox Linux}}~~		{{Navbox Linux}}[[Category:Linux]]

Leo: Text replacement - "{{Navbox Linux}}{{Navbox Linux}}" to "{{Navbox Linux}}"

2019-09-01T05:10:36Z

Text replacement - "{{Navbox Linux}}{{Navbox Linux}}" to "{{Navbox Linux}}"

← Older revision		Revision as of 05:10, 1 September 2019
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	[[Category:Linux]]~~{{Navbox Linux}}~~{{Navbox Linux}}		[[Category:Linux]]{{Navbox Linux}}

Leo: Text replacement - "Category:Linux" to "Category:Linux{{Navbox Linux}}"

2019-09-01T05:08:08Z

Text replacement - "Category:Linux" to "Category:Linux{{Navbox Linux}}"

← Older revision		Revision as of 05:08, 1 September 2019
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	[[Category:Linux]]{{Navbox Linux}}		[[Category:Linux]]{{Navbox Linux}}{{Navbox Linux}}

Leo: Text replacement - "{{Navbox Linux}} {{Navbox Linux}}" to "{{Navbox Linux}}"

2019-09-01T04:50:13Z

Text replacement - "{{Navbox Linux}} {{Navbox Linux}}" to "{{Navbox Linux}}"

← Older revision		Revision as of 04:50, 1 September 2019
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	[[Category:Linux]]{{Navbox Linux}}		[[Category:Linux]]{{Navbox Linux}}
	~~{{Navbox Linux}}~~

Leo: Text replacement - "Category:Linux " to "Category:Linux{{Navbox Linux}} "

2019-09-01T03:48:44Z

Text replacement - "Category:Linux " to "Category:Linux{{Navbox Linux}} "

← Older revision		Revision as of 03:48, 1 September 2019
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	[[Category:Linux]]		[[Category:Linux]]{{Navbox Linux}}
	{{Navbox Linux}}		{{Navbox Linux}}

Leo at 23:49, 5 March 2017

2017-03-05T23:49:45Z

← Older revision		Revision as of 23:49, 5 March 2017
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	The default permissions set to {{code\|/dev/video0}} is set by udev. If you need to change the device permissions (say making it world read/writable), you will need to create a udev rule by creating a new file in {{code\|/etc/udev/rules.d/}} with the following contents:		The default permissions set to {{code\|/dev/video0}} is set by udev. If you need to change the device permissions (say making it world read/writable), you will need to create a udev rule by creating a new file in {{code\|/etc/udev/rules.d/}} with the following contents:

	~~<syntaxhighlight~~ lang="text">		{{highlight\|lang=text\|code=
	SUBSYSTEM=="video4linux", BUS=="usb", SYSFS{idVendor}=="045e", SYSFS{idProduct}=="0761", NAME="video0", MODE="0666"		SUBSYSTEM=="video4linux", BUS=="usb", SYSFS{idVendor}=="045e", SYSFS{idProduct}=="0761", NAME="video0", MODE="0666"
	~~</syntaxhighlight>~~		}}

	The Vendor ID and product ID must match the values from {{code\|lsusb}}. For the example above (a Microsoft LifeCam VX-2000):		The Vendor ID and product ID must match the values from {{code\|lsusb}}. For the example above (a Microsoft LifeCam VX-2000):
	# lsusb		{{highlight\|lang=terminal\|code=
	Bus 001 Device 005: ID 045e:0761 Microsoft Corp.		# lsusb
			Bus 001 Device 005: ID 045e:0761 Microsoft Corp.
			}}


			=== Capturing Utilities/Daemons ===
	To capture images, use any one of the following utilities:		To capture images, use any one of the following utilities:
	* fswebcam		* [[motion]]
			* [[fswebcam]]
	* uvccapture		* uvccapture

	~~You may configure the webcam settings using {{code\|v4l-utils}}~~. ~~See http://www.techytalk.info/webcam-settings-control-ubuntu-fedora-linux-operating-system-cli/~~		My Raspberry Pis use [[motion]] to automatically capture snapshots periodically to a NFS share.

	=== ~~fswebcam~~ ===		=== Configuration ===
	~~fswebcam~~ -~~r 640x480 --jpeg 85 -D 1 web-cam-shot~~.~~jpg~~		You may configure the webcam settings using {{code\|v4l-utils}}.

	~~==== Dumping fswebcam images via HTTP ====~~		See Also:
	~~You can make a quick an dirty wrapper around the command above so that it can be viewed via the web~~.		* http://www.techytalk.info/webcam-settings-control-ubuntu-fedora-linux-operating-system-cli/

	~~<syntaxhighlight lang="php">~~
	~~<?php~~

	~~system("fswebcam~~ -~~r 640x480~~ --~~jpeg 85~~ -~~D 1 /tmp/out.jpg > /dev/null");~~
	~~header("Content~~-~~Type: image/jpeg");~~
	~~echo file_get_contents("/tmp~~/~~out.jpg");~~
	~~</syntaxhighlight>~~


	~~=== uvccapture ===~~
	~~Another utility to capture webcam images is {{code\|uvccapture}}.~~


	[[Category:Linux]]		[[Category:Linux]]
	{{Navbox Linux}}		{{Navbox Linux}}

Leo: Text replacement - "" to "}}"

2017-02-24T19:15:05Z

Text replacement - "</code>" to "}}"

← Older revision		Revision as of 19:15, 24 February 2017
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	== Linux ==		== Linux ==
	To get a webcam working for Linux, ensure that it's supported. Newer webcams tend to have support though cheaper non-HD webcams from China might not. You should see a {{code\|/dev/video0~~</code>~~ device when the webcam is plugged into the computer. If not, check {{code\|dmesg~~</code>~~ and see if the USB device is being detected. {{code\|lsusb~~</code>~~ should also list it.		To get a webcam working for Linux, ensure that it's supported. Newer webcams tend to have support though cheaper non-HD webcams from China might not. You should see a {{code\|/dev/video0}} device when the webcam is plugged into the computer. If not, check {{code\|dmesg}} and see if the USB device is being detected. {{code\|lsusb}} should also list it.

	The default permissions set to {{code\|/dev/video0~~</code>~~ is set by udev. If you need to change the device permissions (say making it world read/writable), you will need to create a udev rule by creating a new file in {{code\|/etc/udev/rules.d/~~</code>~~ with the following contents:		The default permissions set to {{code\|/dev/video0}} is set by udev. If you need to change the device permissions (say making it world read/writable), you will need to create a udev rule by creating a new file in {{code\|/etc/udev/rules.d/}} with the following contents:

	<syntaxhighlight lang="text">		<syntaxhighlight lang="text">
Line 9:		Line 9:
	</syntaxhighlight>		</syntaxhighlight>

	The Vendor ID and product ID must match the values from {{code\|lsusb~~</code>~~. For the example above (a Microsoft LifeCam VX-2000):		The Vendor ID and product ID must match the values from {{code\|lsusb}}. For the example above (a Microsoft LifeCam VX-2000):
	# lsusb		# lsusb
	Bus 001 Device 005: ID 045e:0761 Microsoft Corp.		Bus 001 Device 005: ID 045e:0761 Microsoft Corp.
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	* uvccapture		* uvccapture

	You may configure the webcam settings using {{code\|v4l-utils~~</code>~~. See http://www.techytalk.info/webcam-settings-control-ubuntu-fedora-linux-operating-system-cli/		You may configure the webcam settings using {{code\|v4l-utils}}. See http://www.techytalk.info/webcam-settings-control-ubuntu-fedora-linux-operating-system-cli/

	=== fswebcam ===		=== fswebcam ===
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	=== uvccapture ===		=== uvccapture ===
	Another utility to capture webcam images is {{code\|uvccapture~~</code>~~.		Another utility to capture webcam images is {{code\|uvccapture}}.


	[[Category:Linux]]		[[Category:Linux]]
	{{Navbox Linux}}		{{Navbox Linux}}

Leo: Text replacement - "`" to "{{code|"`


2017-02-24T19:13:34Z
Text replacement - "<code>" to "{{code|"

				
				
				
				
				
				← Older revision
				Revision as of 19:13, 24 February 2017
				
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== Linux == == Linux ==
To get a webcam working for Linux, ensure that it's supported. Newer webcams tend to have support though cheaper non-HD webcams from China might not. You should see a <code>/dev/video0</code> device when the webcam is plugged into the computer. If not, check <code>dmesg</code> and see if the USB device is being detected. <code>lsusb</code> should also list it. To get a webcam working for Linux, ensure that it's supported. Newer webcams tend to have support though cheaper non-HD webcams from China might not. You should see a {{code|/dev/video0</code> device when the webcam is plugged into the computer. If not, check {{code|dmesg</code> and see if the USB device is being detected. {{code|lsusb</code> should also list it.



The default permissions set to <code>/dev/video0</code> is set by udev. If you need to change the device permissions (say making it world read/writable), you will need to create a udev rule by creating a new file in <code>/etc/udev/rules.d/</code> with the following contents: The default permissions set to {{code|/dev/video0</code> is set by udev. If you need to change the device permissions (say making it world read/writable), you will need to create a udev rule by creating a new file in {{code|/etc/udev/rules.d/</code> with the following contents:



<syntaxhighlight lang="text"> <syntaxhighlight lang="text">
Line 9:
Line 9:
</syntaxhighlight> </syntaxhighlight>



The Vendor ID and product ID must match the values from <code>lsusb</code>. For the example above (a Microsoft LifeCam VX-2000): The Vendor ID and product ID must match the values from {{code|lsusb</code>. For the example above (a Microsoft LifeCam VX-2000):
  # lsusb   # lsusb
  Bus 001 Device 005: ID 045e:0761 Microsoft Corp.   Bus 001 Device 005: ID 045e:0761 Microsoft Corp.
Line 18:
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* uvccapture * uvccapture



You may configure the webcam settings using <code>v4l-utils</code>. See http://www.techytalk.info/webcam-settings-control-ubuntu-fedora-linux-operating-system-cli/ You may configure the webcam settings using {{code|v4l-utils</code>. See http://www.techytalk.info/webcam-settings-control-ubuntu-fedora-linux-operating-system-cli/



=== fswebcam === === fswebcam ===
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=== uvccapture === === uvccapture ===
Another utility to capture webcam images is <code>uvccapture</code>. Another utility to capture webcam images is {{code|uvccapture</code>.






[[Category:Linux]] [[Category:Linux]]
{{Navbox Linux}} {{Navbox Linux}}



Leo at 06:01, 29 March 2015
2015-03-29T06:01:59Z


				
				
				
				
				
				← Older revision
				Revision as of 06:01, 29 March 2015
				
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=== uvccapture === === uvccapture ===
  Another utility to capture webcam images is <code>uvccapture</code>.






[[Category:Linux]] [[Category:Linux]]
{{Navbox Linux}}

← Older revision		Revision as of 19:13, 24 February 2017
Line 1:		Line 1:

	== Linux ==		== Linux ==
	To get a webcam working for Linux, ensure that it's supported. Newer webcams tend to have support though cheaper non-HD webcams from China might not. You should see a <code>/dev/video0</code> device when the webcam is plugged into the computer. If not, check <code>dmesg</code> and see if the USB device is being detected. <code>lsusb</code> should also list it.		To get a webcam working for Linux, ensure that it's supported. Newer webcams tend to have support though cheaper non-HD webcams from China might not. You should see a {{code\|/dev/video0</code> device when the webcam is plugged into the computer. If not, check {{code\|dmesg</code> and see if the USB device is being detected. {{code\|lsusb</code> should also list it.

	The default permissions set to <code>/dev/video0</code> is set by udev. If you need to change the device permissions (say making it world read/writable), you will need to create a udev rule by creating a new file in <code>/etc/udev/rules.d/</code> with the following contents:		The default permissions set to {{code\|/dev/video0</code> is set by udev. If you need to change the device permissions (say making it world read/writable), you will need to create a udev rule by creating a new file in {{code\|/etc/udev/rules.d/</code> with the following contents:

	<syntaxhighlight lang="text">		<syntaxhighlight lang="text">
Line 9:		Line 9:
	</syntaxhighlight>		</syntaxhighlight>

	The Vendor ID and product ID must match the values from <code>lsusb</code>. For the example above (a Microsoft LifeCam VX-2000):		The Vendor ID and product ID must match the values from {{code\|lsusb</code>. For the example above (a Microsoft LifeCam VX-2000):
	# lsusb		# lsusb
	Bus 001 Device 005: ID 045e:0761 Microsoft Corp.		Bus 001 Device 005: ID 045e:0761 Microsoft Corp.
Line 18:		Line 18:
	* uvccapture		* uvccapture

	You may configure the webcam settings using <code>v4l-utils</code>. See http://www.techytalk.info/webcam-settings-control-ubuntu-fedora-linux-operating-system-cli/		You may configure the webcam settings using {{code\|v4l-utils</code>. See http://www.techytalk.info/webcam-settings-control-ubuntu-fedora-linux-operating-system-cli/

	=== fswebcam ===		=== fswebcam ===
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	=== uvccapture ===		=== uvccapture ===
	Another utility to capture webcam images is <code>uvccapture</code>.		Another utility to capture webcam images is {{code\|uvccapture</code>.


	[[Category:Linux]]		[[Category:Linux]]
	{{Navbox Linux}}		{{Navbox Linux}}

← Older revision		Revision as of 06:01, 29 March 2015
Line 36:		Line 36:

	=== uvccapture ===		=== uvccapture ===
			Another utility to capture webcam images is <code>uvccapture</code>.


	[[Category:Linux]]		[[Category:Linux]]
			{{Navbox Linux}}