c221036502
Previously, the ff_configure_buffers_for_index function had upper sanity limits of 16 MB (1<<24) for buffer_size and 8 MB (1<<23) for short_seek_threshold. However, if the index contained entries with a much larger delta, setting pos_delta to a value larger than the sanity limit, we would end up not increasing the buffer size at all. Instead, ignore the individual deltas that are excessive, but increase the buffer size based on the deltas that are below the sanity limit. Only count deltas that are below 1<<23, 8 MB; pos_delta gets doubled before setting the buffer size - this matches the previous maximum buffer size of 1<<24, 16 MB. This can happen e.g. with a mov file with some tracks containing some samples that belong in the start of the file, at the end of the mdat, while the rest of the file is mostly reasonably interleaved; previously those samples caused the maximum pos_delta to skyrocket, skipping any buffer size enlargement. Signed-off-by: Martin Storsjö <martin@martin.st>
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.