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       sane-v4l - SANE interface for Video for Linux API


       The  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.

       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.


       This backend expects device names of the form:


       Where  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 /dev/video0 or /dev/bttv0.


       The contents of the 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:

              # this is a comment


              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.


       Juergen G. Schimmer, Henning Meier-Geinitz


       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:  You must be subscribed to the list
       to  send  mail.  See for


       sane(7), xcam(1).

                                  14 Jul 2008                      sane-v4l(5)