I’m using infinite focus, no white balance correction and auto exposure correction on my webcams. To set these settings, I’m using v4l2ctrl. It can export the current settings using v4l2ctrl -d /dev/video -s file, and after editing it can load it to the specified device: v4l2ctrl -d /dev/video -l file
I’m using this file for my Microsoft LifeCam Cinema webcams:
1 2 3 4 5 | 9963788:White Balance Temperature, Auto:0 10094858: Focus (absolute):0 10094860: Focus, Auto:0 10094861: Zoom, Absolute:0 10094849: Exposure, Auto:3 |
It gets loaded everytime the webcam is attached to the USB port with udev. The udev rules for my webcams are:
1 2 3 4 | # webcam kelet KERNELS=="1-8", SUBSYSTEMS=="usb", DRIVERS=="usb", ATTRS{idVendor}=="045e", ATTRS{idProduct}=="075d", NAME="video0", RUN+="/usr/bin/v4l2ctrl -d /dev/video0 -l /usr/local/webcam/kelet/v4l2ctrlsettings" # webcam nyugat KERNELS=="1-2.4.4", SUBSYSTEMS=="usb", DRIVERS=="usb", ATTRS{idVendor}=="045e", ATTRS{idProduct}=="075d", NAME="video1", RUN+="/usr/bin/v4l2ctrl -d /dev/video1 -l /usr/local/webcam/nyugat/v4l2ctrlsettings" |
I found out these udev patterns using udevadm info -a -p $(udevadm info -q path -n /dev/video).
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