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VLC media player
[1452 users on Ohloh]
VLC - the cross-platform media player and streaming server

VLC media player is a highly portable multimedia player for various audio and video formats (MPEG-1, MPEG-2, MPEG-4, DivX, mp3, ogg, ...) as well as DVDs, VCDs, and various streaming protocols. It can also be used as a server to stream in unicast or multicast in IPv4 or IPv6 on a high-bandwidth network.

[888 users on Ohloh]
MPlayer is a movie player which runs on many systems and plays most known video and audio formats. Another great feature of MPlayer is the wide range of supported output drivers. It has also an onscreen display (OSD) for status information, nice big antialiased shaded subtitles and visual feedback for keyboard controls.
[451 users on Ohloh]
FFmpeg is a complete solution to record, convert and stream audio and video. It includes libavcodec, the leading audio/video codec library. FFmpeg is developed under Linux, but it can compiled under most operating systems, including Windows.
[246 users on Ohloh]
BitTorrent is a tool for copying files from one machine to another. FTP punishes sites for being popular. Since all uploading is done from one place, a popular site needs big iron and big bandwidth. With BitTorrent, clients automatically mirror files they download, making the publisher's burden almost nothing.

Prior to version 6.0, BitTorrent was written in Python, and was free software. The source code for versions 4.x and 5.x are released under the BitTorrent Open Source License, a modif...

[202 users on Ohloh]
Ogg is a multimedia container format, and the native file and stream format for the Xiph.org multimedia codecs. As with all Xiph.org technology is it an open format free for anyone to use.

libogg is the reference library for demultiplexing and mutiplexing files in the ogg multimedia format.

[185 users on Ohloh]
Totem is a media player for the GNOME desktop environment using GStreamer or xine as a backend. It also includes a browser plugin compatible with Windows Media player targeted websites, and has a plugin system itself, allowing C, Python or Vala plugins to extend Totem and add functionality.
[180 users on Ohloh]
GStreamer is a development framework for creating applications like media players, video editors, streaming media broadcasters and so on. It aims to support every format imaginable.
xine - a free video player
[167 users on Ohloh]
xine is a free multimedia player. It plays back CDs, DVDs, and VCDs. It also decodes multimedia files like AVI, MOV, WMV, and MP3 from local disk drives, and displays multimedia streamed over the Internet. It interprets many of the most common multimedia formats available--and some of the most uncommon formats, too. All those features come in a reusable library (xine-lib) which can easily be embedded in your applications.
mplayerplug-in for mozilla
[81 users on Ohloh]
mplayerplug-in is a plugin for Mozilla to play videos embedded in a Web page. It uses Mplayer to process the video.
[74 users on Ohloh]
MythTV is a home-brew PVR project. It's been under heavy development for seven years, and is now usable and full featured.
[69 users on Ohloh]
VirtualDub is a video capture/processing utility for 32-bit Windows platforms (95/98/ME/NT4/2000/XP), licensed under the GNU General Public License (GPL).
It lacks the editing power of a general-purpose editor such as Adobe Premiere, but is streamlined for fast linear operations over video.
It has batch-processing capabilities for processing large numbers of files and can be extended with third-party video filters. VirtualDub is mainly geared toward processing AV...
[67 users on Ohloh]
Rockbox is an open source replacement firmware for portable music players. It runs on a wide range of different models.
[61 users on Ohloh]
HandBrake is an open-source, GPL-licensed, cross-platform, multithreaded DVD to MPEG-4 converter, available for MacOS X, Linux and Windows.
[58 users on Ohloh]
Kaffeine is full featured Media Player for KDE3. It supports all kinds of local and network media and digital video broadcasting (DVB). At the moment Kaffeine can use xine-lib or GStreamer as backend.
[50 users on Ohloh]
Ekiga (formely known as GnomeMeeting) is an open source VoIP and video conferencing application for GNOME. Ekiga uses both the H.323 and SIP protocols. It supports many audio and video codecs, and is interoperable with other SIP compliant software and also with Microsoft NetMeeting.
[47 users on Ohloh]
ffdshow is DirectShow and VFW codec for decoding/encoding many video and audio formats, including DivX and XviD movies using libavcodec, xvid and other opensourced libraries with a rich set of postprocessing filters.
[35 users on Ohloh]
Avidemux is a free open-source program designed for multi-purpose video editing and processing, which can be used on almost all known operating systems and computer platforms.
[32 users on Ohloh]
VirtualDubMod is based on the famous video editing software VirtualDub by Avery Lee. Born as a unification of several existing modifications, a lot of new features have been added, including support for the matroska container format.
[31 users on Ohloh]
Kino is a non-linear DV (digital video) editor for GNU/Linux. It features integration with IEEE-1394 for capture, VTR control, and recording back to the camera. It captures video to disk in RawDV and AVI format, in both type-1 DV and type-2 DV (separate audio stream) encodings. You can load multiple video clips, cut and paste portions of video/audio, and save to an edit decision list (SMIL XML format). Most edit and navigation commands are mapped to equivalent vi key commands. Also, Kino can loa...
[30 users on Ohloh]
Tags: multimedia codec video lossy mpeg4
Xvid is a MPEG-4 video codec for PC. Its purpose is to compress video in order to allow for faster transmission over computer networks or for more efficient storage on computer disks. Hence, Xvid can somewhat be seen as a ZIP for video. Xvid removes information from video that is not important for human perception in order to achieve very high compression rates while still keeping very good visual quality. As an example: uncompressed digital video is huge and takes up about 100 GB HD space per h...