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If this function returns an error after ff_sws_graph_add_pass() has been called, and the pass->free callback is therefore already set up to free the context, the graph will end up freed twice: once by the pass->free callback (during ff_sws_graph_free()), and once before that by failure path of the caller (e.g. add_legacy_sws_pass(), or init_legacy_subpass() itself for cascaded contexts.) The solution is to redefine the ownership of SwsGraph to pass clearly from the caller of add_legacy_sws_pass() to init_legacy_subpass(), which can then deal with appropriately freeing the context conditional on whether or not the pass was already registered in the pass list. Reported-by: 김영민 <kunshim@naver.com> Signed-off-by: Niklas Haas <git@haasn.dev>
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.