1a469a5e42
The include of config.h was added in 2012 in 1d9c2dc8, due to the use of CONFIG_SNOW_ENCODER ifdefs within options_table.h. When the snow codec was dropped later (in a0c5917f8 in 2013), this include no longer served any purpose. options_table.h is included in builds for the host as well, when building documentation. config.h should not be included in code that is built for the host, since it can contain workarounds for the target compiler/environment, like adding a missing define of restrict, defining getenv(x) to NULL for environments that lack getenv. The seemingly innocent include reordering in 2025d37871 broke builds that have getenv(x) defined to NULL in config.h (Windows CE and Windows Phone/RT), since libavcodec/options_table.h include config.h, while libavformat/options_table.h end up bringing in more system headers, and those system headers can contain a proper definition of getenv, which clash with the getenv define in config.h. This was avoided earlier as long as libavformat/options_table.h (or avformat.h) was included before libavcodec/options_table.h. This fixes builds for Windows Phone/RT and CE. Signed-off-by: Martin Storsjö <martin@martin.st>
Libav
Libav is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
Libraries
libavcodecprovides implementation of a wider range of codecs.libavformatimplements streaming protocols, container formats and basic I/O access.libavutilincludes hashers, decompressors and miscellaneous utility functions.libavfilterprovides a mean to alter decoded Audio and Video through chain of filters.libavdeviceprovides an abstraction to access capture and playback devices.libavresampleimplements audio mixing and resampling routines.libswscaleimplements color conversion and scaling routines.
Tools
- avconv is a command line toolbox to manipulate, convert and stream multimedia content.
- avplay is a minimalistic multimedia player.
- avprobe is a simple analisys tool to inspect multimedia content.
- Additional small tools such as
aviocat,ismindexandqt-faststart.
Documentation
The offline documentation is available in the doc/ directory.
The online documentation is available in the main website and in the wiki.
Examples
Conding examples are available in the doc/example directory.
License
Libav codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.