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sane-qcam(5)									     sane-qcam(5)

       sane-qcam - SANE backend for Connectix QuickCam cameras

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

       This backend expects device names of the form:


       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.

       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 gener-
       ally undesirable).

	      The backend configuration file (see also description of SANE_CONFIG_DIR below).

	      The static library implementing this backend.

	      The  shared  library  implementing  this	backend  (present on systems that support
	      dynamic loading).

	      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).

	      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.

       David Mosberger

       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.  Report-
       edly, 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-priviledges since it needs to be able to access the camera's I/O


					 25 October 1997			     sane-qcam(5)
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