3a822717bd
Failures of the allocations that happen under the hood when using dynamic buffers are usually completely unchecked and the Matroska muxer is no exception to this. The API has its part in this, because there is no documented way to actually check for errors: The return value of both avio_get_dyn_buf() as well as avio_close_dyn_buf() is only documented as "the length of the byte buffer", so that using this to return errors would be an API break. Therefore this commit uses the only reliable way to check for errors with avio_get_dyn_buf(): The AVIOContext's error flag. (This is one of the advantages of avio_get_dyn_buf(): By not destroying the AVIOContext it is possible to inspect this value.) Checking whether the size or the pointer vanishes is not enough as it does not check for truncated output (the dynamic buffer API is int based and so has to truncate the buffer even when enough memory would be available; it's current actual limit is even way below INT_MAX). 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.