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116 wiersze
4.3 KiB
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<TITLE>sane-v4l.5</TITLE>
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<BODY BGCOLOR=#FFFFFF TEXT=#000000><H1 ALIGN=CENTER><IMG SRC="/images/sane.png" HEIGHT=117 WIDTH=346></H1>
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<H1>sane-v4l.5</H1>
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<HR>
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<PRE>
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<!-- Manpage converted by man2html 3.0.1 -->
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<B><A HREF="sane-v4l.5.html">sane-v4l(5)</A></B> SANE Scanner Access Now Easy <B><A HREF="sane-v4l.5.html">sane-v4l(5)</A></B>
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</PRE>
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<H2>NAME</H2><PRE>
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sane-v4l - SANE interface for Video for Linux API
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</PRE>
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<H2>DESCRIPTION</H2><PRE>
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The <B>sane-v4l</B> library implements a SANE (Scanner Access Now Easy) back-
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end that provides generic access to video cameras and similar equipment
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using the V4L (Video for Linux) API.
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This is ALPHA software. Really! Important features are missing and
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there are lots of bugs. The code is currently only tested on a Linux
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2.4 system with a Hauppauge WinTV video card.
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</PRE>
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<H2>DEVICE NAMES</H2><PRE>
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This backend expects device names of the form:
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<I>special</I>
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Where <I>special</I> is the UNIX path-name for the special device that corre-
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sponds to the v4l device. The special device name must be a v4l device
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or a symlink to such a device. For example, such a device name could
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be <I>/dev/video0</I> or <I>/dev/bttv0</I>.
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</PRE>
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<H2>CONFIGURATION</H2><PRE>
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The contents of the <I>v4l.conf</I> file is a list of device names that corre-
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spond to v4l devices. Empty lines and lines starting with a hash mark
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(#) are ignored. A sample configuration file is shown below:
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/dev/bttv0
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# this is a comment
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/dev/video3
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</PRE>
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<H2>FILES</H2><PRE>
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<I>/usr/local/etc/sane.d/v4l.conf</I>
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The backend configuration file (see also description of
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<B>SANE_CONFIG_DIR</B> below).
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<I>/usr/local/lib/sane/libsane-v4l.a</I>
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The static library implementing this backend.
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<I>/usr/local/lib/sane/libsane-v4l.so</I>
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The shared library implementing this backend (present on systems
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that support dynamic loading).
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</PRE>
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<H2>ENVIRONMENT</H2><PRE>
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<B>SANE_CONFIG_DIR</B>
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This environment variable specifies the list of directories that
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may contain the configuration file. On *NIX systems, the direc-
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tories are separated by a colon (`:'), under OS/2, they are sep-
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arated by a semi-colon (`;'). If this variable is not set, the
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configuration file is searched in two default directories:
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first, the current working directory (".") and then in
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<I>/usr/local/etc/sane.d</I>. If the value of the environment variable
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ends with the directory separator character, then the default
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directories are searched after the explicitly specified directo-
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ries. For example, setting <B>SANE_CONFIG_DIR</B> to "/tmp/config:"
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would result in directories <I>tmp/config</I>, <I>.</I>, and
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<I>/usr/local/etc/sane.d</I> being searched (in this order).
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<B>SANE_DEBUG_V4L</B>
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If the library was compiled with debug support enabled, this
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environment variable controls the debug level for this backend.
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E.g., a value of 128 requests all debug output to be printed.
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Smaller levels reduce verbosity.
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</PRE>
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<H2>AUTHOR</H2><PRE>
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Juergen G. Schimmer, Henning Meier-Geinitz
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</PRE>
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<H2>BUGS:</H2><PRE>
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If more than one video card is present, a crash may occur. Frequency
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and geometry selection is missing.
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Send bug reports to the SANE mailing list: <I>sane-devel@alioth-</I>
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<I>lists.debian.net</I>. You must be subscribed to the list to send mail. See
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<I>http://www.sane-project.org/mailing-lists.html</I> for details.
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</PRE>
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<H2>SEE ALSO</H2><PRE>
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<B><A HREF="sane.7.html">sane(7)</A></B>, <B><A HREF="xcam.1.html">xcam(1)</A></B>
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14 Jul 2008 <B><A HREF="sane-v4l.5.html">sane-v4l(5)</A></B>
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</PRE>
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