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) backend that provides generic access to video cam-
eras 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 corresponds 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 correspond 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
/usr/freeware/etc/sane.d/v4l.conf
The backend configuration file (see also descrip-
tion of SANE_CONFIG_DIR below).
/usr/freeware/lib32/sane/libsane-v4l.a
The static library implementing this backend.
/usr/freeware/lib32/sane/libsane-v4l.so
The shared library implementing this backend (pre-
sent 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
configuration file is searched in two default
directories: first, the current working directory
(".") and then in /usr/freeware/etc/sane.d. If the
value of the environment variable ends with the
directory separator character, then the default
directories are searched after the explicitly spec-
ified directories. For example, setting
SANE_CONFIG_DIR to "/tmp/config:" would result in
directories "tmp/config", ".", and "/usr/free-
ware/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@mostang.com. You must be subscribed to the list to
send mail. See http://www.mostang.com/sane/mail.html for
details.
SEE ALSOsane(7), xcam(1).
sane-backends 1.0.12 28 Aug 2002 sane-v4l(5)
