• 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/sane/libsane-qcam.a

  The static library implementing this backend.

  /usr/lib/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.  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 /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)

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