41ab25cb2d
This muxer solely exists to test the fifo muxer via a dedicated test tool in libavformat/tests/fifo_muxer.c. It fulfills no other role and it is only designed with this role in mind. The latter can be seen in two facts: The muxer uses printf for logging and it simply presumes the packets' data to contain a FailingMuxerPacketData (a struct duplicated in fifo_test.c and tests/fifo_muxer.c.); in particular, it presumes packets to have data at all, but this need not be true with side-data only packets and a segfault can easily be triggered by e.g. encoding flac (our native encoder sends a side-data only packet with updated extradata at the end of encoding). This patch fixes this by moving the test muxer into the fifo test tool, making it inaccessible via the API (and actually removing it from libavformat.so and libavformat.a). While this muxer was accessible via e.g. av_guess_format(), it was not really usable for an API user as FailingMuxerPacketData was not public. Therefore this is not considered a breaking change. In order to continue to use the test muxer in the test tool, the ordinary fifo muxer had to be overridden: fifo_muxer.c includes lavf/fifo.c but with FIFO_TEST defined which makes it support the fifo_test muxer. This is possible because test tools are always linked statically to their respective library. Reviewed-by: Stefano Sabatini <stefasab@gmail.com> 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 means to alter decoded audio and video through a directed graph of connected 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.