NAME

       sane-qcam - SANE backend for Connectix QuickCam cameras

DESCRIPTION

       The  sane-qcam library implements a SANE (Scanner Access Now Easy) backend that provides access Connectix
       QuickCam cameras.

DEVICE NAMES

       This backend expects device names of the form:

              port

       where port is the I/O port address at which the device resides.  This address is  normally  specified  in
       hexadecimal  using C syntax (e.g., 0x37b) and may be prefixed with the letter "u" (e.g., u0x37b) to force
       the backend to access the camera in uni-directional mode.

CONFIGURATION

       The contents of the qcam.conf file is a list  port  addresses  that  may  be  connected  to  a  Connectix
       QuickCam.   Empty lines and everything starting from a hash mark (#) up to the end of a line are ignored.
       A sample configuration file is shown below:

              0x37b  # /dev/lp0
              0x378  # /dev/lp1
              u0x278 # /dev/lp2 forced in uni-directional mode
              0x3bc  # /dev/lp0 (alternate address)

       In general, it is safest to list only the port addresses that  really  correspond  to  a  QuickCam.   For
       example, if one of the listed addresses actually connect to a printer, then starting up this backend will
       cause the printer to perform a device reset (which is generally undesirable).

FILES

       /etc/sane.d/qcam.conf
              The backend configuration file (see also description of SANE_CONFIG_DIR below).

       /usr/lib/x86_64-linux-gnu/sane/libsane-qcam.a
              The static library implementing this backend.

       /usr/lib/x86_64-linux-gnu/sane/libsane-qcam.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 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  /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 specified directories.  For example, setting
              SANE_CONFIG_DIR to "/tmp/config:" would result in directories tmp/config, ., and /etc/sane.d being
              searched (in this order).

       SANE_DEBUG_QCAM
              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

       David Mosberger

BUGS

       Support is currently limited to the color  version  of  the  QuickCam.   The  black-and-white  camera  is
       starting  to  work  too,  but I don't believe it works in all cases yet.  Reportedly, acquiring images of
       certain sizes work fine, but others result in shifted images (sounds like a problem due to byte-padding).

       The program needs root-privileges since it needs to be able to access the camera's I/O ports.

SEE ALSO

       sane(7)

                                                   14 Jul 2008                                      sane-qcam(5)