2c8f99deb8
The segment muxer has an option to output a file containing a list of the segments written. The AVIOContext used for writing this file is opened via the main AVFormatContext's io_open callback; seg_free() meanwhile unconditionally closes this AVIOContext by calling ff_format_io_close() with the child muxer (the one for the actual output format) as AVFormatContext. The problem hereby is that the child AVFormatContext need not exist, even when the AVIOContext does. This leads to a segfault in ff_format_io_close() when the child muxer's io_close callback is called. Situations in which the AVFormatContext can be NULL range from an invalid reference stream parameter to an unavailable/bogus/unsupported output format to inability to allocate the AVFormatContext. The solution is to simply close the AVIOContext with the AVFormatContext that was used to open it: The main AVFormatContext. Reviewed-by: Ridley Combs <rcombs@rcombs.me> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com> (cherry picked from commit 936d967871562e36e307126b59e4e6bbb3a3bab7)
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.