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# [Galicaster configuration|Galicaster configuration].
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#** [Device module configuration]
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h4. Rules to access the cards - UDEV rules
To fix the path to access a device is interesting to set UDEV rules on the system. On this section we provide a general approach to the set up of UDEV rules, leaving the details for the specific pages of each compatible device.
Create the file {{/etc/udev/rules.d/galicaster.rules}}, which will contain the udev rules that will be applied to the devices.
Use the following command to find out the value of *{{ATTR\{name\}}}* for a specific device:
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$ udevadm info --attribute-walk --name=${device}
{code}
substituting {{"$\{device\}"}} for the device's mount point, for example:
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$ udevadm info --attribute-walk --name=/dev/video0
$ udevadm info --attribute-walk --name=/dev/video1 | grep name
{code}
(e.g. {{/dev/video0}})
These are some configuration examples:
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KERNEL=="video[0-9]*", ATTR{name}=="Epiphan VGA2USB #V2U19350", GROUP="video", SYMLINK+="screen"
KERNEL=="video[0-9]*", ATTR{name}=="ivtv0 encoder MPG", GROUP="video", SYMLINK+="camera"
KERNEL=="video[0-9]*", ATTR{name}=="UVC Camera (046d:0821)", GROUP="video", SYMLINK+="webcam"
KERNEL=="video[0-9]*", ATTR{name}=="ivtv0 encoder MPG", GROUP="video", SYMLINK+="haucamera"
KERNEL=="video[0-9]*", ATTR{name}=="ivtv0 encoder YUV", GROUP="video", SYMLINK+="hauprevideo"
KERNEL=="video[0-9]*", ATTR{name}=="ivtv0 encoder PCM", GROUP="audio", SYMLINK+="haupreaudio"
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For newer Epiphan drivers:
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KERNEL=="video[0-9]*", ATTR{name}=="vga2usb", SYMLINK+="screen"
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