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Martin Storsjö 4136405c86 aarch64: me_cmp: Don't do uaddlv once per iteration 
The max height is currently documented as 16; the max difference per
pixel is 255, and a .8h element can easily contain 16*255, thus keep
accumulating in two .8h vectors, and just do the final accumulationat the
end. This should work for heights up to 256.

This requires a minor register renumbering in ff_pix_abs16_xy2_neon.

Before:       Cortex A53    A72    A73   Graviton 3
pix_abs_0_0_neon:   97.7   47.0   37.5   22.7
pix_abs_0_1_neon:  154.0   59.0   52.0   25.0
pix_abs_0_3_neon:  179.7   96.7   87.5   41.2
After:
pix_abs_0_0_neon:   96.0   39.2   31.2   22.0
pix_abs_0_1_neon:  150.7   59.7   46.2   23.7
pix_abs_0_3_neon:  175.7   83.7   81.7   38.2

Signed-off-by: Martin Storsjö <martin@martin.st>
2022-07-16 17:26:17 +03:00
compat avfilter: add chromakey_cuda filter 2022-07-10 17:20:15 +02:00
doc ffmpeg: add option -isync 2022-07-14 15:48:24 +05:30
ffbuild ffbuild/common: Fix CPPFLAGS applied for compiling C++ files 2022-05-24 21:30:52 +02:00
fftools ffmpeg: add option -isync 2022-07-14 15:48:24 +05:30
libavcodec aarch64: me_cmp: Don't do uaddlv once per iteration 2022-07-16 17:26:17 +03:00
libavdevice Bump versions after 5.1 branch 2022-07-13 00:29:05 +02:00
libavfilter Bump versions after 5.1 branch 2022-07-13 00:29:05 +02:00
libavformat Bump versions after 5.1 branch 2022-07-13 00:29:05 +02:00
libavutil Bump versions after 5.1 branch 2022-07-13 00:29:05 +02:00
libpostproc Bump versions after 5.1 branch 2022-07-13 00:29:05 +02:00
libswresample Bump versions after 5.1 branch 2022-07-13 00:29:05 +02:00
libswscale Bump versions after 5.1 branch 2022-07-13 00:29:05 +02:00
presets
tests checkasm: motion: Make the benchmarks more stable 2022-07-16 17:25:35 +03:00
tools tools/target_dec_fuzzer: adjust threshold for flic 2022-07-12 21:55:22 +02:00
.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 '899ee03088d55152a48830df0899887f055da1de' 2019-03-14 15:53:16 -03:00
Changelog Changelog: Add version <next> 2022-07-13 00:29:57 +02:00
configure configure: add missing deps for chromakey_cuda filter 2022-07-10 17:42:58 +02:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
INSTALL.md
LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS MAINTAINERS: add myself as maintainer for LoongArch. 2022-06-08 18:29:30 +02:00
Makefile Makefile: Prompt for reconfigure on lavc/hwaccels.h modification 2022-07-01 00:34:38 +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.