42f40d36b7
The last workaround is not sufficient to make oss fuzz work with the iterate API as it did not provide a FFmpeg that external libs can be linked to. This patch does not fully restore the pre iterate functionality. My attempts to do this have so far failed. The problem with this solution is that it renders the fuzzers virtual system ffmpeg (libs) non functional. Which differs from a real system compared to the virtual system tested by the fuzzer. It should theoretically not matter as the system ffmpeg wouldnt be used. But with more cases being fuzzed we likely will hit a case where a external lib is involved and it does matter ... Working around this may be possible with weak symbols but so far my attempts failed Alternatively multiple ffmpeg could be built, this becomes messy though quickly as they need to be all linked together. That is we need a FFmpeg that has the iterate API modified so it can work with the resources available to ossfuzz. And at the same time we need a ffmpeg that has its full functionality for any external libs which use ffmpeg and are used by ffmpeg. Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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.