libzvbi - VBI capture and decoding library Copyright (C) 2000-2008 Michael H. Schimek Copyright (C) 2000, 2001 Iñaki García Etxebarria Copyright (C) 2003, 2004, 2007 Tom Zoerner Originally based on AleVT 1.5.1 by Edgar Toernig This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the file COPYING.LIB for more details. Software in this package which is not part of the library, including code generators, programs in the test and contrib directories, and the VBI proxy daemon, are licensed under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING for more details. Programs in the examples directory are licensed under a 2-clause BSD-style license. See the respective source files for details. -------------------------------------------------------------------------- Introduction ============ The vertical blanking interval (VBI) is an interval in an analog television signal that temporarily suspends transmission of the signal for the electron gun to move back up to the first line of the television screen to trace the next screen field. The vertical blanking interval can be used to carry data, since anything sent during the VBI would naturally not be displayed; various test signals, closed captioning, and other digital data can be sent during this time period. The ZVBI library provides functions to read from Linux V4L, V4L2 and FreeBSD BKTR raw VBI capture devices, from Linux DVB devices and from a VBI proxy to share V4L and V4L2 VBI devices between multiple applications. It can demodulate raw to sliced VBI data in software, with support for a wide range of formats, has functions to decode several popular services including Teletext and Closed Caption, a Teletext cache with search function, various text export and rendering functions. Basically ZVBI offers all functions needed by VBI applications except for the user interface. The library was written for the Zapping TV viewer http://zapping.sourceforge.net. For details on using the library see the documentation in doc/html (built only if you have Doxygen http://www.doxygen.org/ installed) and the files in the test and examples directories. Bindings ======== Tom Zoerner wrote a Perl interface to libzvbi. The ZVBI Perl module covers all exported libzvbi functions. Most of the functions and parameters are exposed nearly identical, or with minor adaptions for the Perl idiom. Find out more at http://search.cpan.org/~TOMZO/Video-ZVBI Download ======== The latest version is available from http://zapping.sourceforge.net as a tarball and publicly readable CVS. Christian Marillat maintains a Debian package: http://packages.debian.org/source/zvbi Oliver Lehmann maintains a FreeBSD port: http://www.freebsd.org/cgi/ports.cgi?query=libzvbi For RPMs please see the repository of your distribution. Sourceforge and Freshmeat can notify you about new releases by e-mail: http://sourceforge.net/project/filemodule_monitor.php?filemodule_id=41356 http://freshmeat.net/subscribe/?url=%2Fprojects%2Flibzvbi%2F Installation ============ If you checked out the sources from CVS, run "./autogen.sh" to create missing configuration and make files. To build and install type "./configure", "make", "make check" if you want to run some tests, and "make install". For additional instructions see the INSTALL file. The library has been tested on Linux and FreeBSD. Questions, comments, concerns, complaints, irritations, aggravations, insinuations, allegations, accusations, contemplations, consternations ====================================================================== * You can post patches, feature requests and bug reports at our Sourceforge tracker: https://sourceforge.net/tracker/?group_id=2599 Please log in or leave an e-mail address for further inquiries and progress notification. * Or you can send a message to the Zapping mailing list: zapping-misc@lists.sourceforge.net You can subscribe or unsubscribe at: http://lists.sourceforge.net/lists/listinfo/zapping-misc Subscription is not required, but non-member messages may be delayed for spam filtering. This is a low volume list. You can browse the list archives at: http://sourceforge.net/mailarchive/forum.php?forum_name=zapping-misc * Or you can try our IRC channel: #zapping at irc.freenode.net Primary author and maintainer of this library is Michael H. Schimek <mschimek@users.sourceforge.net> Encrypted e-mail is welcome. You can find my PGP/GPG key in the AUTHORS file, e.g. type "gpg --import <AUTHORS". Ich spreche deutsch.