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x86/tx_float: replace fft_sr_avx with fft_sr_fma3 
When the SLOW_GATHER flag was added to the AVX2 version, this
made FMA3-features not enabled on Zen CPUs.
As FMA3 adds 6-7% across all platforms that support it, in
the interest of saving space, this commit removes the AVX
version and replaces it with an FMA3 version.
The only CPUs affected are Sandy Bridge and Bulldozer, which
have AVX support, but no FMA3 support.
In the future, if there's a demand for it, a version of the
function duplicated for AVX can be added.
2022-05-21 02:11:50 +02:00
compat Replace all occurences of av_mallocz_array() by av_calloc() 2021-09-20 01:03:52 +02:00
doc doc/muxers: note write_btrt option for MOV/MP4 2022-05-16 13:56:38 +05:30
ffbuild lib*/version: Move library version functions into files of their own 2022-05-10 06:49:32 +02:00
fftools opt_common: note D and T type streams for completeness. 2022-05-20 23:42:23 +05:30
libavcodec avcodec/mpegvideo: Move float.h inclusion to mpegvideoenc.h 2022-05-19 19:16:23 +02:00
libavdevice avdevice/dshow: reuse unused variables. 2022-05-12 22:06:44 -03:00
libavfilter avfilter/formats: Constify channel_layout in ff_add_channel_layout() 2022-05-19 20:20:38 +02:00
libavformat avformat/sccenc: avoid potential invalid access 2022-05-19 21:17:31 +08:00
libavutil x86/tx_float: replace fft_sr_avx with fft_sr_fma3 2022-05-21 02:11:50 +02:00
libpostproc lib*/version: Move library version functions into files of their own 2022-05-10 06:49:32 +02:00
libswresample lib*/version: Move library version functions into files of their own 2022-05-10 06:49:32 +02:00
libswscale lib*/version: Move library version functions into files of their own 2022-05-10 06:49:32 +02:00
presets
tests tests/fate: Remove intermediate file of flv-add_keyframe_index test 2022-05-20 10:16:04 +02:00
tools avcodec/codec_internal: Add FFCodec, hide internal part of AVCodec 2022-03-21 01:33:09 +01:00
.gitattributes
.gitignore gitignore: add config_components.h 2022-03-17 18:35:41 -03:00
.mailmap mailmap: add entry for myself 2021-03-09 02:09:55 +00:00
.travis.yml Merge commit '899ee03088' 2019-03-14 15:53:16 -03:00
Changelog lavc/pgs_frame_merge_bsf: add bsf to merge PGS segments 2022-05-10 10:03:30 +02:00
configure avformat/movenc: Add support for AVIF muxing 2022-05-13 12:46:21 +05:30
CONTRIBUTING.md
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 avformat/image2: add Jpeg XL as image2 format 2022-04-23 19:51:46 +02:00
Makefile lib*/version: Move library version functions into files of their own 2022-05-10 06:49:32 +02:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
RELEASE Bump Versions before release/4.4 branch 2021-03-20 01:01:12 +01:00

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.