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e7cbbd9026
A PutBitContext has a field called size_in_bits which is set to the context's bitsize init_put_bits(); but it isn't used at all (the PutBits API uses pointers directly and not bit indexes), so remove it (due to ABI concerns the actual element is only removed at the next bump). Furthermore, the multiplication inherent in setting this field can lead to undefined integer overflows. This is particularly true for FFV1, which uses a very big worst-case buffer (37*4*width*height; even ordinary 1080p triggers an overflow). Ticket #8350 is about this overflow which this commit fixes. This means that the effective range of the PutBits API is no longer restricted by the /8 as long as one isn't using put_bits_(count|left). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.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.