sane-v4l.5

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sane-v4l(5) SANE Scanner Access Now Easy sane-v4l(5)

NAME

 sane-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

 /usr/local/etc/sane.d/v4l.conf
 The backend configuration file (see also description of
 SANE_CONFIG_DIR below).
 /usr/local/lib/sane/libsane-v4l.a
 The static library implementing this backend.
 /usr/local/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. On *NIX systems, the direc-
 tories are separated by a colon (`:'), under OS/2, they are sep-
 arated 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/lo-
 cal/etc/sane.d. If the value of the environment variable ends
 with the directory separator character, then the default direc-
 tories are searched after the explicitly specified directories.
 For example, setting SANE_CONFIG_DIR to "/tmp/config:" would re-
 sult in directories tmp/config, ., and /usr/local/etc/sane.d be-
 ing searched (in this order).
 SANE_DEBUG_V4L
 If the library was compiled with debug support enabled, this en-
 vironment 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@alioth-lists.de-
 bian.net. You must be subscribed to the list to send mail. See
 http://www.sane-project.org/mailing-lists.html for details.

SEE ALSO

 sane(7), xcam(1)
 14 Jul 2008 sane-v4l(5)

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