No description
3fb09dba40
- Allow to add deps in any order rather than "in linking order". - Expand deps chains as required rather than just once. - Validate that there are no cycles. - Validate that [after expansion] deps are limited to other fflibs. - Remove expectation for a specific output order of unique(). Previously when adding items to <fflib>_deps, developers were required to add them in linking order. This can be awkward and bug-prone, especially when a list is not empty, e.g. when adding conditional deps. It also implicitly expected unique() to keep the last instance of recurring items such that these lists maintain their linking order after removing duplicate items. This patch mainly allows to add deps in any order by keeping just one master list in linking order, and then reordering all the <fflib>_deps lists to align with the master list order. This master list is LIBRARY_LIST itself, where otherwise its order doesn't matter. The patch also removes a limit where these deps lists were expanded only once. This could have resulted in incomplete expanded lists, or forcing devs to add already-deducable deps to avoid this issue. Note: it is possible to deduce the master list order automatically from the deps lists, but in this case it's probably not worth the added complexity, even if minor. Maintaining one list should be OK. Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> |
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|---|---|---|
| compat | ||
| doc | ||
| ffbuild | ||
| fftools | ||
| libavcodec | ||
| libavdevice | ||
| libavfilter | ||
| libavformat | ||
| libavresample | ||
| libavutil | ||
| libpostproc | ||
| libswresample | ||
| libswscale | ||
| presets | ||
| tests | ||
| tools | ||
| .gitattributes | ||
| .gitignore | ||
| .travis.yml | ||
| Changelog | ||
| configure | ||
| CONTRIBUTING.md | ||
| COPYING.GPLv2 | ||
| COPYING.GPLv3 | ||
| COPYING.LGPLv2.1 | ||
| COPYING.LGPLv3 | ||
| CREDITS | ||
| INSTALL.md | ||
| LICENSE.md | ||
| MAINTAINERS | ||
| Makefile | ||
| README.md | ||
| RELEASE | ||
| RELEASE_NOTES | ||
FFmpeg README
FFmpeg 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.libswresampleimplements audio mixing and resampling routines.libswscaleimplements color conversion and scaling routines.
Tools
- ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
- ffplay is a minimalistic multimedia player.
- ffprobe is a simple analysis 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
Coding examples are available in the doc/examples directory.
License
FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.
Contributing
Patches should be submitted to the ffmpeg-devel mailing list using
git format-patch or git send-email. Github pull requests should be
avoided because they are not part of our review process and will be ignored.