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Valerii Zapodovnikov 8426622bb9 avformat/avio: clarify that AVSEEK_FORCE has no effect 
avio_seek() never supported SEEK_END and returned AVERROR(EINVAL) when
specified, so the later check "(whence != SEEK_END || force)" was always true.

This also means that AVSEEK_FORCE had no effect since 7a6fe01f99, that is 15
years ago. Rather than changing behaviour, let's document instead that the flag
has no effect.

Also fixed other commit 41ed7ab45f which confused ORing / passing AVSEEK_FORCE
and AVSEEK_SIZE in the docs.

Signed-off-by: Valerii Zapodovnikov <val.zapod.vz@gmail.com>
2025-08-17 20:47:11 +00:00
.forgejo .forgejo/CODEOWNERS: add myself to JPEG XL and PNG 2025-08-16 05:07:19 -04:00
compat w32pthreads: add support for setting thread name 2025-08-15 19:54:01 +00:00
doc doc/examples/decode_filter_video: use av_usleep 2025-08-11 19:29:53 +00:00
ffbuild ffbuild/commonmak: Consolidate pattern rules for compression 2025-08-13 17:39:49 +00:00
fftools fftools/ffmpeg_mux_init: Use 64bit for score computation in map_auto_video() 2025-08-14 00:36:29 +00:00
libavcodec avcodec/sanm: Check w,h,left,top 2025-08-17 15:39:33 +02:00
libavdevice Bump versions for master after release/8.0 2025-08-09 18:03:05 +02:00
libavfilter avfilter/whisper: correct option formatting 2025-08-17 00:58:03 +00:00
libavformat avformat/avio: clarify that AVSEEK_FORCE has no effect 2025-08-17 20:47:11 +00:00
libavutil w32pthreads: add support for setting thread name 2025-08-15 19:54:01 +00:00
libswresample Bump versions for master after release/8.0 2025-08-09 18:03:05 +02:00
libswscale swscale/swscale_unscaled: use 8 line alignment for planarCopyWrapper with dithering 2025-08-12 21:56:09 +00:00
presets
tests tests/fate/cbs: add a test for gray apv 2025-08-13 11:42:50 -03:00
tools tools: Split the list of source plugins out of "merge-all-source-plugins" 2025-08-13 11:50:52 +00:00
.gitattributes gitattributes: End merge conflicts in Changelog 2025-03-17 15:26:10 +01:00
.gitignore forgejo/workflows: add initial rudimentary CI 2025-07-22 20:06:20 +02:00
.mailmap mailmap: add entry for myself 2025-08-08 21:51:15 +00:00
Changelog configure: require at least OpenSSL 1.1.1 (LTS) 2025-08-16 00:15:30 +00:00
configure configure: require at least OpenSSL 1.1.1 (LTS) 2025-08-16 00:15:30 +00:00
CONTRIBUTING.md Add CONTRIBUTING.md 2016-09-18 10:02:13 +01:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1 all: fix whitespace/new-line issues 2025-08-03 13:48:47 +02:00
COPYING.LGPLv3
CREDITS Use https for repository links 2023-03-01 21:59:10 +01:00
FUNDING.json Add FUNDING.json 2025-06-23 14:48:40 +02:00
INSTALL.md all: fix typos found by codespell 2025-08-03 13:48:47 +02:00
LICENSE.md Remove libpostproc 2025-05-07 15:35:47 +02:00
MAINTAINERS MAINTAINERS: add myself as hwcontext_d3d12va maintainer 2025-08-08 21:51:15 +00:00
Makefile Makefile: Split ALLFFLIBS 2025-05-26 20:33:10 +02:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
RELEASE RELEASE: update to 8.0 2025-08-14 08:42:29 -04:00

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.