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Martin Storsjö 6f2ad7f951 aarch64: me_cmp: Avoid redundant loads in ff_pix_abs16_y2_neon 
This avoids one redundant load per row; pix3 from the previous
iteration can be used as pix2 in the next one.

Before:       Cortex A53    A72    A73
pix_abs_0_2_neon:  138.0   59.7   48.0
After:
pix_abs_0_2_neon:  109.7   50.2   39.5

Signed-off-by: Martin Storsjö <martin@martin.st>
2022-09-29 10:29:10 +03:00
compat compat/cuda: switch from powf to __powf intrinsic 2022-09-03 20:27:34 +02:00
doc avcodec/avcodec: Deprecate lavc chroma pos API functions 2022-09-26 03:02:49 +02:00
ffbuild configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
fftools ffprobe: Check for invalid matrix error when printing rotation 2022-09-27 17:37:21 +01:00
libavcodec aarch64: me_cmp: Avoid redundant loads in ff_pix_abs16_y2_neon 2022-09-29 10:29:10 +03:00
libavdevice avformat/internal: Don't include avcodec.h 2022-09-26 03:02:50 +02:00
libavfilter avfilter/vf_extractplanes: add missing break; statement 2022-09-27 19:35:49 +02:00
libavformat format/imfdec: improve error handling when selecting tracks for playback 2022-09-28 11:54:52 +10:00
libavutil avutil/display: Drop wrong comments about matrices being allocated 2022-09-29 00:05:32 +02:00
libpostproc configure: always enable gnu_windres if available 2022-08-13 14:42:36 +02:00
libswresample swsresample/swresample: error out on invalid layouts 2022-09-14 09:52:33 -03:00
libswscale swscale/output: Don't call av_pix_fmt_desc_get() in a loop 2022-09-19 23:40:41 +02:00
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tests lavu/cpu: CPU flags for the RISC-V Vector extension 2022-09-27 13:19:52 +02:00
tools tools/target_dec_fuzzer: Adjust threshold for Jpeg2000 2022-09-16 21:30:59 +02:00
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Changelog avformat: add APAC demuxer 2022-09-23 20:27:35 +02:00
configure configure: remove mdct15 from the encoder/decoder's list of requirements 2022-09-28 00:08:48 +02:00
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README.md
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.