Difference between revisions of "Webcams"

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(Office webcam feed is no longer available)
 
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A [http://csclub.uwaterloo.ca/office/webcam live webcam feed] of the office is available online.
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The live webcam feed of the office is no longer available.
  
== Operation ==
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See the previous history of this page for historical information about the webcam feed.
 
 
We use [http://www.lavrsen.dk/twiki/bin/view/Motion/WebHome Motion] to serve this webcam feed. It uses video4linux to read from the webcam, and pushes frames to the client (who maintains an HTTP connection). Frames are pushed when a certain amount of motion has detected, or a set maximum amount of time has passed since the last frame. One of these runs on each of our webcam hosts ([[Machine_List#maltodextrin|maltodextrin]] and [[Machine_List#bit-shifter|bit-shifter]]). Motion includes a builtin tiny HTTP server (running on port 8081 in our case) which serves a sequence of JPEG images to the browser. An ordinary <tt><img></tt> tag is embedded in the web page, and browsers will update the image when they receive a new one over the HTTP connection.
 
 
 
The Motion documentation is fairly self-explanatory, but here are the options we use for the webcam server part:
 
 
 
webcam_port 8081
 
webcam_quality 30
 
webcam_motion on
 
webcam_maxrate 5
 
webcam_localhost off
 
webcam_limit 1000
 
 
 
 
 
We also have a couple of udev rules to map the camera devices to a constant location and to disable any on-camera mice. These rules exist at /etc/udev/rules.d/99-csc-webcams.rules on the right machines.
 
 
 
=== maltodextrin cam ===
 
 
 
# Create symlink for camera device at /dev/csc/malto-cam
 
SUBSYSTEMS=="usb", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="0808", ATTRS{serial}=="714B8C60", ATTRS{bInterfaceClass}=="0e", SYMLINK+="csc/malto-cam", GROUP="motion"
 
 
# Disable the cam's mic
 
SUBSYSTEMS=="usb", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="0808", ATTRS{serial}=="714B8C60", ATTRS{bInterfaceClass}=="01", ATTR{authorized}="0"
 
 
 
=== bit-shifter cam ===
 
 
 
# Create symlink for camera device at /dev/csc/bitshifter-cam
 
SUBSYSTEM=="video4linux", SUBSYSTEMS=="usb", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="082c", ATTRS{serial}=="AF2F2AD0", SYMLINK+="csc/bitshifter-cam", GROUP="motion"
 
 
 
== Webcam Counter ==
 
 
 
Also known as the "implicit consent sign". The sign is connected via serial to bit-shifter. Associated scripts which update the counter are found in /opt/camcount/ on bit-shifter.
 
 
 
If the counter isn't working, /opt/camcount/daemon likely needs to be restarted.
 
 
 
== Hardware ==
 
 
 
=== Logitech QuickCam Messenger ===
 
* USB IDs: 046d:08da
 
* Kernel module: gspca (gspca-source)
 
* Max resolution: 640x480
 
 
 
=== Logitech QuickCam Zoom ===
 
* USB IDs: 046d:08b3
 
* Kernel module: pwc
 
* Max resolution: 640x480
 
 
 
=== Logitech QuickCam Web ===
 
* USB IDs: 046d:0850
 
* Kernel module: quickcam (qc-usb-source package)
 
* Max resolution: 480x360
 
 
 
=== Logitech QuickCam Chat ===
 
* USB IDs: 046d:092c
 
* Kernel module: gspca (gspca-source)
 
* Max resolution: 480x360
 
 
 
[[Category:Hardware]]
 

Latest revision as of 14:48, 28 June 2016

The live webcam feed of the office is no longer available.

See the previous history of this page for historical information about the webcam feed.