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GStreamer is a multimedia framework written in the C programming language with the type system based on GObject. GStreamer serves a host of multimedia applications, such as video editors, streaming media broadcasters, and media players. Designed to be cross-platform, it is known to work on Linux (x86, PowerPC and ARM), Solaris (x86 and SPARC), Mac OS X, Microsoft Windows and OS/400. GStreamer is free software, licensed under the GNU Lesser General Public License. The GNOME desktop environment is the primary user of GStreamer technology, having included GStreamer since GNOME version 2.2 and encourages GNOME and GTK+ applications to use it. Other groups are beginning to use it as well.
History and developmentThe project was founded in 1999 by Erik Walthinsen and had many of its core design ideas taken from a research project at University of Oregon. Wim Taymans joined the project soon thereafter and greatly expanded on many aspects of the system. Many others around the world have contributed to various degrees since then. The GStreamer logo was designed by Brock A. Frazier, working for an embedded Linux company called RidgeRun, which also was the first corporate sponsor of GStreamer in the form of hiring Erik Walthinsen to develop methods for embedding GStreamer in smaller (cell phone-class) devices. It is a hosted project at freedesktop.org, and therefore aims to improve interoperability and share technology between free desktops. Internals technical overviewA bin or pipeline consists of elements/plugins. Elements contain pads such as source and sink. Data flows through the pipeline in a single direction. Pads have capabilities called 'caps'.
PluginsGStreamer uses a plugin architecture which makes most of GStreamer's functionality implemented as shared libraries. GStreamer’s base functionality contains functions for registering and loading plugins and for providing the fundamentals of all classes in the form of base classes. Plugin libraries are dynamically loaded to support a wide spectrum of codecs, container formats and input/output drivers. Bindings are provided for programming languages like Python, C++, Perl, GNU Guile and Ruby. CriticismGStreamer has been criticized by KDE developers for not offering a stable ABI, which makes it unsuitable as the standard multimedia framework in KDE4 and could prevent its inclusion in the Linux Standard Base. This problem eventually led to the development of Phonon, a simplified multimedia framework for KDE4, which would provide wrappers for other multimedia frameworks, including GStreamer.[1] Common applications using GStreamer
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