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.  Under UNIX, the directories
52              are separated by a colon (`:'), under OS/2, they  are  separated
53              by a semi-colon (`;').  If this variable is not set, the config‐
54              uration file is searched in two default directories: first,  the
55              current working directory (".") and then in /etc/sane.d.  If the
56              value of the environment variable ends with the directory  sepa‐
57              rator character, then the default directories are searched after
58              the explicitly  specified  directories.   For  example,  setting
59              SANE_CONFIG_DIR  to  "/tmp/config:"  would result in directories
60              "tmp/config", ".", and "/etc/sane.d"  being  searched  (in  this
61              order).
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63       SANE_DEBUG_V4L
64              If  the  library  was  compiled with debug support enabled, this
65              environment 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-
77       lists.debian.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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