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Lynne 56b85b689d aacdec_ac: fix signed overflow in ff_aac_ac_update_context() 
The issue is that state->cur[] is 8-bits, but a+b+1 can overflow
before being clipped to 0xF in the following line, causing an incorrect
state to be saved for the next symbol.

This solves numerous bitstream desyncs, particularly when coefficients
with magnitude greater than 127 are sent.
2025-05-24 02:19:18 +09:00
compat compat/cuda: add device side printf function 2025-05-14 22:08:33 +02:00
doc avfilter/vf_libplacebo: add shader_cache option 2025-05-23 14:05:16 +02:00
ffbuild build: remove unused SLIBOBJS variable 2025-05-22 23:59:03 +02:00
fftools ffmpeg: Don't print graphs if there are no outputs yet 2025-05-18 15:17:41 +01:00
libavcodec aacdec_ac: fix signed overflow in ff_aac_ac_update_context() 2025-05-24 02:19:18 +09:00
libavdevice avfoundation: Fix compilation for OSes other than macOS and iOS 2025-04-04 17:12:33 +03:00
libavfilter avfilter/vf_libplacebo: add shader_cache option 2025-05-23 14:05:16 +02:00
libavformat avformat/matroskadec: Accept WebVTT subtitles with empty cues 2025-05-23 00:43:33 +02:00
libavutil avutil/refstruct: Remove redundant check 2025-05-22 15:12:54 +02:00
libswresample libs: bump major version for all libraries 2025-03-28 14:44:34 -03:00
libswscale swscale/swscale_unscaled: fix planarRgbToplanarRgbWrapper() for formats with bpc between 9-14 bits 2025-05-23 00:07:56 +02:00
presets presets: remove moldering iPod presets 2014-06-17 16:15:04 -08:00
tests tests/fate/ac3: Make ac3-fixed-encode-2 bitexact across arches 2025-05-23 14:06:26 +02:00
tools tools/merge-all-source-plugins: Check that there are no uncommited changes 2025-05-15 16:19:59 +02:00
.gitattributes gitattributes: End merge conflicts in Changelog 2025-03-17 15:26:10 +01:00
.gitignore ffmpeg/repo: Add dot-folders in the repository root to .gitignore 2025-04-19 17:29:12 +02:00
.mailmap mailmap: add entry for myself 2024-07-15 01:59:37 +02:00
Changelog Changelog: VVC supports all content of SCC 2025-05-17 09:24:01 +08:00
configure configure: identify loong64 for loongarch 2025-05-20 21:19:53 +08:00
CONTRIBUTING.md Add CONTRIBUTING.md 2016-09-18 10:02:13 +01:00
COPYING.GPLv2 Rename COPYING.GPL --> COPYING.GPLv2 and COPYING.LGPL --> COPYING.LGPLv2.1. 2009-06-05 09:51:31 +00:00
COPYING.GPLv3 Add configure option to upgrade (L)GPL to version 3. 2009-06-05 11:04:03 +00:00
COPYING.LGPLv2.1 cosmetics: Delete empty lines at end of file. 2012-02-09 12:26:45 +01:00
COPYING.LGPLv3 Add configure option to upgrade (L)GPL to version 3. 2009-06-05 11:04:03 +00:00
CREDITS Use https for repository links 2023-03-01 21:59:10 +01:00
INSTALL.md Add tools/merge-all-source-plugins 2025-05-15 12:17:04 +02:00
LICENSE.md Remove libpostproc 2025-05-07 15:35:47 +02:00
MAINTAINERS MAINTAINERS: Add entry for samples-request 2025-05-15 03:03:54 +02:00
Makefile build: remove unused SLIBOBJS variable 2025-05-22 23:59:03 +02:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
RELEASE RELEASE: update release number after release/7.1 branch 2024-10-09 01:55:50 +02:00

README.md

FFmpeg README

FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.

Libraries

  • libavcodec provides implementation of a wider range of codecs.
  • libavformat implements streaming protocols, container formats and basic I/O access.
  • libavutil includes hashers, decompressors and miscellaneous utility functions.
  • libavfilter provides means to alter decoded audio and video through a directed graph of connected filters.
  • libavdevice provides an abstraction to access capture and playback devices.
  • libswresample implements audio mixing and resampling routines.
  • libswscale implements 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, ismindex and qt-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.