Theora is a free lossy video compression format. It is developed by the Xiph.Org Foundation and distributed without licensing fees alongside their other free and open media projects, including the Vorbis audio format and the Ogg container.
FFmpeg is a free and open-source software project consisting of a large suite of libraries and programs for handling video, audio, and other multimedia files and streams. At its core is the FFmpeg program itself, designed for command-line-based processing of video and audio files, and widely used for format transcoding, basic editing, video scaling, video post-production effects, and standards compliance.
VLC media player is a free and open-source, portable, cross-platform media player software and streaming media server developed by the VideoLAN project. VLC is available for desktop operating systems and mobile platforms, such as Android, iOS, iPadOS, Tizen, Windows 10 Mobile and Windows Phone. VLC is also available on digital distribution platforms such as Apple's App Store, Google Play and Microsoft Store.
Media Player Classic (MPC) is a free and open-source compact media player for 32-bit and 64-bit Microsoft Windows. MPC mimics the look and feel of Windows Media Player 6.4, but provides most options and features available in modern media players. It and its forks are standard media players in the K-Lite Codec Pack and the Combined Community Codec Pack.
In image processing, hqx is one of the pixel art scaling algorithms developed by Maxim Stepin, used in emulators such as Nestopia, FCEUX, higan, Snes9x, ZSNES and many more. There are three hqx filters defined: hq2x, hq3x, and hq4x, which magnify by factor of 2, 3, and 4 respectively. For other magnification factors, this filter is used with nearest-neighbor scaling.
The following comparison of video players compares general and technical information for notable software media player programs.
ffdshow is an open source unmaintained codec mainly used for decoding of video in the MPEG-4 ASP and H.264/MPEG-4 AVC video formats, but it supports numerous other video and audio formats as well. It is free software released under GNU General Public License 2.0, runs on Windows, and is implemented as a Video for Windows (VFW) codec and a DirectShow filter.
FAAC or Freeware Advanced Audio Coder is a software project which includes the AAC encoder FAAC and decoder FAAD2. It supports MPEG-2 AAC as well as MPEG-4 AAC. It supports several MPEG-4 Audio object types, file formats, multichannel and gapless encoding/decoding and MP4 metadata tags. The encoder and decoder is compatible with standard-compliant audio applications using one or more of these object types and facilities. It also supports Digital Radio Mondiale.
Avidemux is a free and open-source transcoding and video editing software, designed for easy-to-use and simple video editing and video processing.
Xbox Media Player,, now obsolete, was the predecessor to XBMC and XBMC4Xbox, a feature-rich free and open source media player for the Xbox (console). With an audio/video-player-core based on MPlayer, it allowed owners of a modified Xbox to display pictures and movie files, as well as play music files from the Xbox DVD-ROM drive, built-in harddisk drive, LAN (SMB) or the Internet.
libavcodec is a free and open-source library of codecs for encoding and decoding video and audio data.
The following tables compare general and technical information for a variety of audio coding formats. For listening tests comparing the perceived audio quality of audio formats and codecs, see the article Codec listening test.
GPAC Project on Advanced Content is an implementation of the MPEG-4 Systems standard written in ANSI C. GPAC provides tools for media playback, vector graphics and 3D rendering, MPEG-4 authoring and distribution.
Multiview Video Coding is a stereoscopic video coding standard for video compression that allows for the efficient encoding of video sequences captured simultaneously from multiple camera angles in a single video stream. It uses the 2D plus Delta method and is an amendment to the H.264 video compression standard, developed jointly by MPEG and VCEG, with contributions from a number of companies, primarily Panasonic and LG Electronics.
The following comparison of audio players compares general and technical information for a number of software media player programs. For the purpose of this comparison, "audio players" are defined as any media player explicitly designed to play audio files, with limited or no support for video playback. Multi-media players designed for video playback, which can also play music, are included under comparison of video player software.
Libav is a free software project, forked from FFmpeg in 2011, that produces libraries and programs for handling multimedia data.
mpv is free and open-source media player software based on MPlayer, mplayer2 and FFmpeg. It runs on several operating systems, including the Unix-like operating systems and the non-Unix Microsoft Windows, along with having an Android port called mpv-android. It is cross-platform, running on ARM, PowerPC, x86/IA-32, x86-64, and MIPS architecture.
Fraunhofer FDK AAC is an open-source software library for encoding and decoding Advanced Audio Coding (AAC) format audio, developed by Fraunhofer IIS, and included as part of Android 4.1. It supports several Audio Object Types including MPEG-2 and MPEG-4 AAC LC, HE-AAC, HE-AACv2 as well AAC-LD and AAC-ELD for real-time communication. The encoding library supports sample rates up to 96 kHz and up to eight channels.
Flowblade Movie Editor is a free and open-source video editing software for Linux.
