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Lynne ae66a9db7b lavu/tx: optimize and simplify inverse MDCTs Convert the input from a scatter to a gather instead, which is faster and better for SIMD. Also, add a pre-shuffled exptab version to avoid gathering there at all. This doubles the exptab size, but the speedup makes it worth it. In SIMD, the exptab will likely be purged to a higher cache anyway because of the FFT in the middle, and the amount of loads stays identical. For a 960-point inverse MDCT, the speedup is 10%. This makes it possible to write sane and fast SIMD versions of inverse MDCTs.		2022-08-16 01:22:38 +02:00
compat	compat: add msvc windres wrapper	2022-08-13 14:42:52 +02:00
doc	lavu/hwcontext_qsv: add loader field to AVQSVDeviceContext	2022-08-12 10:43:39 +08:00
ffbuild	…
fftools	fftools: add DPI awareness manifest	2022-08-13 14:42:52 +02:00
libavcodec	avcodec/mpegvideo: Don't zero unnecessarily	2022-08-15 18:19:19 +02:00
libavdevice	configure: always enable gnu_windres if available	2022-08-13 14:42:36 +02:00
libavfilter	avfilter/vsrc_ddagrab: add options for more control over output format fallback	2022-08-13 15:22:14 +02:00
libavformat	ipfsgateway: Remove default gateway	2022-08-15 20:09:13 +01:00
libavutil	lavu/tx: optimize and simplify inverse MDCTs	2022-08-16 01:22:38 +02:00
libpostproc	configure: always enable gnu_windres if available	2022-08-13 14:42:36 +02:00
libswresample	configure: always enable gnu_windres if available	2022-08-13 14:42:36 +02:00
libswscale	configure: always enable gnu_windres if available	2022-08-13 14:42:36 +02:00
presets	…
tests	lavu/pixfmt: add packed RGBA float16 format	2022-08-13 15:21:46 +02:00
tools	tools/target_dec_fuzzer: set avctx->workaround_bugs flags	2022-07-26 09:15:16 -03:00
.gitattributes	…
.gitignore	…
.mailmap	…
.travis.yml	…
CONTRIBUTING.md	…
COPYING.GPLv2	…
COPYING.GPLv3	…
COPYING.LGPLv2.1	…
COPYING.LGPLv3	…
CREDITS	…
Changelog	lavc/vaapi_encode: enable 8bit 4:4:4 encoding for HEVC and VP9	2022-08-09 09:22:49 -07:00
INSTALL.md	…
LICENSE.md	…
MAINTAINERS	MAINTAINERS: Add ED25519 key for signing my commits in the future	2022-08-09 21:57:31 +02:00
Makefile	…
README.md	…
RELEASE	…
configure	compat: add msvc windres wrapper	2022-08-13 14:42:52 +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.