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5312208f12
This reverts commit628a73f8f3. At the time of said commit there was talk of removing the audio bitrate "ab" option to bring FFmpeg in line with what Libav has done in 2012 in commit041cd5a0c5. By having different option flags for the "ab" and the ordinay bitrate "b" option is is possible to have different default bitrates for audio and video. In order to maintain this behaviour and not break user scripts the commit to be reverted added code to ffmpeg.c that set the bitrate value to the audio default for audio codecs, but only if AVCodec.defaults didn't exist (as in this case the default would be codec-default and not affected by the "ab" removal). This had the downside of being an API violation, because AVCodec.defaults is not a public field. Given that the "ab" option and its audio-specific default value have never been removed, said API violation can be simply fixed by reverting said commit. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
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.