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James Darnley c3d36e1b3d avcodec/v210enc: add new function for avx2 avx512 avx512icl 
Negligible speed difference for avx2 on Zen 2 (Ryzen 5700X) and
Broadwell (Xeon E5-2620 v4):
    1690±4.3 decicycles vs. 1693±78.4
    1439±31.1 decicycles vs 1429±16.7

Moderate speedup with avx512 on Skylake-X (Xeon D-2123IT):
1.22x faster (793±0.8 vs. 649±5.5 decicycles) compared with avx2

Better speedup with avx512icl on Ice Lake (Xeon Silver 4316):
1.77x faster (784±1.8 vs. 442±11.6 decicycles) compared with avx2

Co-authors:
    Henrik Gramner <henrik@gramner.com>
    Kieran Kunhya <kierank@obe.tv>
2022-11-04 19:37:46 +01:00
compat compat/cuda: switch from powf to __powf intrinsic 2022-09-03 20:27:34 +02:00
doc avfilter/vf_pseudocolor: add spectral preset 2022-11-04 08:50:04 +01:00
ffbuild configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
fftools ffmpeg: fix implementation of updated input start time 2022-11-03 14:38:42 +05:30
libavcodec avcodec/v210enc: add new function for avx2 avx512 avx512icl 2022-11-04 19:37:46 +01:00
libavdevice avdevice/avdevice: Fix mismatching argument name 2022-10-17 09:51:47 +02:00
libavfilter avfilter/af_dynaudnorm: add slice threading support 2022-11-04 18:32:13 +01:00
libavformat avformat/serdec: fix BE/LE format handling 2022-11-03 16:59:18 +01:00
libavutil avutil/tests/cpu: print the avx512icl flag 2022-11-04 19:37:46 +01:00
libpostproc configure: always enable gnu_windres if available 2022-08-13 14:42:36 +02:00
libswresample swresample/rematrix: support mixing top front left/right channels 2022-11-03 19:39:52 -03:00
libswscale sw_scale: Add specializations for hscale 16 to 19 2022-11-01 15:24:58 +02:00
presets
tests checkasm: add a verbose check function for uint32_t data 2022-11-04 19:37:46 +01:00
tools tools/target_dec_fuzzer: Adjust threshold for FFV1 2022-10-20 21:42:21 +02:00
.gitattributes fate: add SCC test 2017-01-27 17:06:42 +01:00
.gitignore gitignore: add config_components.h 2022-03-17 18:35:41 -03:00
.mailmap mailmap: stop git lying about who I commit things as 2022-11-04 19:37:46 +01:00
.travis.yml Merge commit '899ee03088d55152a48830df0899887f055da1de' 2019-03-14 15:53:16 -03:00
Changelog avcodec: ViewQuest VQC decoder 2022-10-18 13:20:37 +11:00
configure configure: add pkg-config check for chromaprint 2022-11-03 12:37:41 +01:00
CONTRIBUTING.md Add CONTRIBUTING.md 2016-09-18 10:02:13 +01:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
INSTALL.md INSTALL.md: Fix Markdown formatting 2019-01-31 10:29:16 -09:00
LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS MAINTAINERS: remove the project leader section 2022-09-23 16:06:11 +02:00
Makefile configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
RELEASE RELEASE: update after 5.1 branch 2022-07-13 00:31:42 +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.