mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2026-10-24 02:09:03 +03:00
19feb712f5
This is a behavior preserving change for all non-overflowing cases.
Slice-based filters computed per-slice boundaries as (dim * jobnr) / nb_jobs
in int, which overflows for large dimensions with many slice threads,
yielding wrong slice bounds and out-of-array accesses. ff_slice_pos()
performs the multiplication in 64bit.
Backported to 5.1: applied the ff_slice_pos() conversion to the filters
present in 5.1 (filters added after the 5.1 branch are skipped), and added
the required filters.h includes. ff_slice_pos() itself is already present
in 5.1. Channel-count based slices (bounded, cannot overflow) are left as
in 6.1.
(cherry picked from commit f7368f97b9)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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.