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FFmpeg git repo
TODO: bump minor It's inferior in quality to fdk-aac and has an arguably more problematic license. As early as 2012, a HydrogenAudio user reported: > It has however one huge advantage: much better quality at low bitrates than > faac and libaacplus. (https://hydrogenaud.io/index.php?PHPSESSID=ckiq394pdglka0kj2fin6ij8t7&topic=95989.msg804633#msg804633) I myself have made a few spectrograms for a comparison of the two encoders as well. The FDK output is consistently better than the libaacplus one, in all bitrates I tested. libaacplus license is 3GPP + LGPLv2. 3GPP copyright notice is completely proprietory, as follows: > No part may be reproduced except as authorized by written permission. > > The copyright and the foregoing restriction extend to reproduction in > all media. > > © 2008, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC). > > All rights reserved. (The latest 26410-d00 zip from 3GPP has the same notice, but the copyright year is changed to 2015) The copyright part of the FDK AAC license (section 2) is a copyleft license that permits redistribution under certain conditions (and therefore the LGPL + libfdk-aac combination is not prohibited by configure): > Redistribution and use in source and binary forms, with or without > modification, are permitted without payment of copyright license fees > provided that you satisfy the following conditions: > > You must retain the complete text of this software license in > redistributions of the FDK AAC Codec or your modifications thereto in > source code form. > > You must retain the complete text of this software license in the > documentation and/or other materials provided with redistributions of > the FDK AAC Codec or your modifications thereto in binary form. > > You must make available free of charge copies of the complete source > code of the FDK AAC Codec and your modifications thereto to recipients > of copies in binary form. > > The name of Fraunhofer may not be used to endorse or promote products > derived from this library without prior written permission. > > You may not charge copyright license fees for anyone to use, copy or > distribute the FDK AAC Codec software or your modifications thereto. > > Your modified versions of the FDK AAC Codec must carry prominent > notices stating that you changed the software and the date of any > change. For modified versions of the FDK AAC Codec, the term > "Fraunhofer FDK AAC Codec Library for Android" must be replaced by the > term "Third-Party Modified Version of the Fraunhofer FDK AAC Codec > Library for Android." |
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compat | ||
doc | ||
libavcodec | ||
libavdevice | ||
libavfilter | ||
libavformat | ||
libavresample | ||
libavutil | ||
libpostproc | ||
libswresample | ||
libswscale | ||
presets | ||
tests | ||
tools | ||
.gitattributes | ||
.gitignore | ||
.travis.yml | ||
arch.mak | ||
Changelog | ||
cmdutils_common_opts.h | ||
cmdutils_opencl.c | ||
cmdutils.c | ||
cmdutils.h | ||
common.mak | ||
configure | ||
COPYING.GPLv2 | ||
COPYING.GPLv3 | ||
COPYING.LGPLv2.1 | ||
COPYING.LGPLv3 | ||
CREDITS | ||
ffmpeg_dxva2.c | ||
ffmpeg_filter.c | ||
ffmpeg_opt.c | ||
ffmpeg_qsv.c | ||
ffmpeg_vdpau.c | ||
ffmpeg_videotoolbox.c | ||
ffmpeg.c | ||
ffmpeg.h | ||
ffplay.c | ||
ffprobe.c | ||
ffserver_config.c | ||
ffserver_config.h | ||
ffserver.c | ||
INSTALL.md | ||
library.mak | ||
LICENSE.md | ||
MAINTAINERS | ||
Makefile | ||
README.md | ||
RELEASE | ||
version.sh |
FFmpeg README
FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
Libraries
libavcodec
provides implementation of a wider range of codecs.libavformat
implements streaming protocols, container formats and basic I/O access.libavutil
includes hashers, decompressors and miscellaneous utility functions.libavfilter
provides a mean to alter decoded Audio and Video through chain of filters.libavdevice
provides an abstraction to access capture and playback devices.libswresample
implements audio mixing and resampling routines.libswscale
implements 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.
- ffserver is a multimedia streaming server for live broadcasts.
- Additional small tools such as
aviocat
,ismindex
andqt-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. Few developers
follow pull requests so they will likely be ignored.