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+.TH sane\-v4l 5 "14 Jul 2008" "@PACKAGEVERSION@" "SANE Scanner Access Now Easy"
+.IX sane\-v4l
+.SH NAME
+sane\-v4l \- SANE interface for Video for Linux API
+.SH DESCRIPTION
+The
+.B sane\-v4l
+library implements a SANE (Scanner Access Now Easy) backend that
+provides generic access to video cameras and similar equipment using
+the V4L (Video for Linux) API.
+.PP
+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.
+.PP
+.SH "DEVICE NAMES"
+This backend expects device names of the form:
+.PP
+.RS
+.I special
+.RE
+.PP
+Where
+.I 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
+.I /dev/video0
+or
+.IR /dev/bttv0 .
+.SH CONFIGURATION
+The contents of the
+.I 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:
+.PP
+.RS
+/dev/bttv0
+.br
+# this is a comment
+.br
+/dev/video3
+.RE
+.SH FILES
+.TP
+.I @CONFIGDIR@/v4l.conf
+The backend configuration file (see also description of
+.B SANE_CONFIG_DIR
+below).
+.TP
+.I @LIBDIR@/libsane\-v4l.a
+The static library implementing this backend.
+.TP
+.I @LIBDIR@/libsane\-v4l.so
+The shared library implementing this backend (present on systems that
+support dynamic loading).
+.SH ENVIRONMENT
+.TP
+.B 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 @CONFIGDIR@.  If the value of the
+environment variable ends with the directory separator character, then
+the default directories are searched after the explicitly specified
+directories.  For example, setting
+.B SANE_CONFIG_DIR
+to "/tmp/config:" would result in directories "tmp/config", ".", and
+"@CONFIGDIR@" being searched (in this order).
+.TP
+.B 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.
+.SH AUTHOR
+Juergen G. Schimmer, Henning Meier-Geinitz
+
+.SH BUGS:
+If more than one video card is present, a crash may occur. Frequency and geometry
+selection is missing.
+.br
+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.
+
+.SH SEE ALSO
+sane(7), xcam(1).