sane-v4l(5)

1sane-v4l(5)              SANE Scanner Access Now Easy              sane-v4l(5)
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NAME

6       sane-v4l - SANE interface for Video for Linux API
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DESCRIPTION

9       The  sane-v4l library implements a SANE (Scanner Access Now Easy) back‐
10       end that provides generic access to video cameras and similar equipment
11       using the V4L (Video for Linux) API.
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13       This  is  ALPHA  software.  Really!  Important features are missing and
14       there are lots of bugs. The code is currently only tested  on  a  Linux
15       2.4 system with a Hauppauge WinTV video card.
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DEVICE NAMES

18       This backend expects device names of the form:
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20              special
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22       Where  special is the UNIX path-name for the special device that corre‐
23       sponds to the v4l device.  The special device name must be a v4l device
24       or  a  symlink to such a device.  For example, such a device name could
25       be /dev/video0 or /dev/bttv0.
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CONFIGURATION

28       The contents of the v4l.conf file is a list of device names that corre‐
29       spond  to v4l devices.  Empty lines and lines starting with a hash mark
30       (#) are ignored.  A sample configuration file is shown below:
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32              /dev/bttv0
33              # this is a comment
34              /dev/video3
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FILES

37       /etc/sane.d/v4l.conf
38              The  backend  configuration  file  (see  also   description   of
39              SANE_CONFIG_DIR below).
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41       /usr/lib64/sane/libsane-v4l.a
42              The static library implementing this backend.
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44       /usr/lib64/sane/libsane-v4l.so
45              The shared library implementing this backend (present on systems
46              that support dynamic loading).
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ENVIRONMENT

49       SANE_CONFIG_DIR
50              This environment variable specifies the list of directories that
51              may contain the configuration file.  On *NIX systems, the direc‐
52              tories are separated by a colon (`:'), under OS/2, they are sep‐
53              arated  by a semi-colon (`;').  If this variable is not set, the
54              configuration file  is  searched  in  two  default  directories:
55              first,   the   current  working  directory  (".")  and  then  in
56              /etc/sane.d.  If the value of the environment variable ends with
57              the  directory separator character, then the default directories
58              are searched after the explicitly  specified  directories.   For
59              example,  setting SANE_CONFIG_DIR to "/tmp/config:" would result
60              in directories tmp/config, ., and /etc/sane.d being searched (in
61              this order).
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63       SANE_DEBUG_V4L
64              If the library was compiled with debug support enabled, this en‐
65              vironment variable controls the debug level  for  this  backend.
66              E.g.,  a  value  of 128 requests all debug output to be printed.
67              Smaller levels reduce verbosity.
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AUTHOR

70       Juergen G. Schimmer, Henning Meier-Geinitz
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BUGS:

74       If more than one video card is present, a crash  may  occur.  Frequency
75       and geometry selection is missing.
76       Send  bug reports to the SANE mailing list: sane-devel@alioth-lists.de‐
77       bian.net.  You must be  subscribed  to  the  list  to  send  mail.  See
78       http://www.sane-project.org/mailing-lists.html for details.
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