sane-v4l(5) SANE Scanner Access Now Easy sane-v4l(5)NAMEsane-v4l - SANE interface for Video for Linux API
DESCRIPTION
The sane-v4l library implements a SANE (Scanner Access Now Easy) back‐
end that provides generic access to video cameras and similar equipment
using the V4L (Video for Linux) API.
This is ALPHA software. Really! Important features are missing and
there are lots of bugs. The code is currently only tested on a Linux
2.4 system with a Hauppauge WinTV video card.
DEVICE NAMES
This backend expects device names of the form:
special
Where special is the UNIX path-name for the special device that corre‐
sponds to the v4l device. The special device name must be a v4l device
or a symlink to such a device. For example, such a device name could
be /dev/video0 or /dev/bttv0.
CONFIGURATION
The contents of the v4l.conf file is a list of device names that corre‐
spond to v4l devices. Empty lines and lines starting with a hash mark
(#) are ignored. A sample configuration file is shown below:
/dev/bttv0
# this is a comment
/dev/video3
FILES
/system/resources/sane-backends/1.0.18/etc/sane.d/v4l.conf
The backend configuration file (see also description of
SANE_CONFIG_DIR below).
/system/resources/sane-backends/1.0.18/lib/sane/libsane-v4l.a
The static library implementing this backend.
/system/resources/sane-backends/1.0.18/lib/sane/libsane-v4l.so
The shared library implementing this backend (present on systems
that support dynamic loading).
ENVIRONMENT
SANE_CONFIG_DIR
This environment variable specifies the list of directories that
may contain the configuration file. Under UNIX, the directories
are separated by a colon (`:'), under OS/2, they are separated
by a semi-colon (`;'). If this variable is not set, the config‐
uration file is searched in two default directories: first, the
current working directory (".") and then in /sys‐
tem/resources/sane-backends/1.0.18/etc/sane.d. If the value of
the environment variable ends with the directory separator char‐
acter, then the default directories are searched after the
explicitly specified directories. For example, setting
SANE_CONFIG_DIR to "/tmp/config:" would result in directories
"tmp/config", ".", and "/system/resources/sane-back‐
ends/1.0.18/etc/sane.d" being searched (in this order).
SANE_DEBUG_V4L
If the library was compiled with debug support enabled, this
environment variable controls the debug level for this backend.
E.g., a value of 128 requests all debug output to be printed.
Smaller levels reduce verbosity.
AUTHOR
Juergen G. Schimmer, Henning Meier-Geinitz
BUGS:
If more than one video card is present, a crash may occur. Frequency
and geometry selection is missing.
Send bug reports to the SANE mailing list: sane-
devel@lists.alioth.debian.org. You must be subscribed to the list to
send mail. See http://www.sane-project.org/mailing-lists.html for
details.
SEE ALSOsane(7), xcam(1).
sane-backends 1.0.18 28 Aug 2002 sane-v4l(5)
