b788343446
The Matroska muxer has the ability to write the Cues (the index) at the beginning of the file (in front of the Cluster): The user inputs the amount of space that should be reserved at the beginning of the file and if this is sufficient, the Cues will be written there and the part of the reserved space not used up by the Cues will be filled with a "Void" element. There is just one problem with this: One can not fill a single byte this way, because said Void element is minimally two bytes long (one byte ID, one byte length field). Up until now, if one reserved one byte more than needed, one would run into an assert when writing the Void element. There are two solutions for this: Error out if it happens. Or adjust the length field of the Cues in order to ensure that the above situation can't happen (i.e. write the length on one byte more than necessary). The first solution is very unsatisfactory, as enough space has been reserved. Therefore this commit implements the second solution. 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.