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a54c94d95f
If the AVIOContext for output was unseekable when writing the header, no space for Cues would be reserved even if the reserve_index_space option was used (because it is reasonable to expect that one can't seek back to the beginning to write the Cues anyway). But if the AVIOContext was seekable when writing the trailer, it was presumed that space for the Cues had been reserved when the reserve_index_space option indicated so even when it was not. As a result, the beginning of the file would be overwritten. This commit fixes this: If the reserve_index_space option had been used and no space has been reserved in advance because of unseekability when writing the header, then no attempt to write Cues will be performed when writing the trailer; after all, writing them at the front is impossible and writing them at the end is probably undesired. 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.