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a5cc0e5c9e
For GET_UTF8(val, GET_BYTE, ERROR), val has type of uint32_t, GET_BYTE must return an unsigned integer, otherwise signed extension happened due to val= (GET_BYTE), and GET_UTF8 went to the error path. This bug incidentally cancelled the bug where hb_buffer_add_utf8 was being called with incorrect argument, allowing drawtext to function correctly on x86 and macOS ARM, which defined char as signed. However, on Linux and Android ARM environments, because char is unsigned by default, GET_UTF8 now returns the correct return, which unexpectedly revealed issue #20906.
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.