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| rpi5 gcc 12 | m1 clang -fno-vectorize | m1 clang --------------------------------------------------------------------------- alpha_8_full_c: | 32159.2 ( 1.00x) | 135.8 ( 1.00x) | 26.4 ( 1.00x) alpha_8_full_neon: | 1266.0 (25.40x) | 8.0 (17.03x) | 8.4 ( 3.15x) alpha_8_limited_c: | 37561.9 ( 1.00x) | 169.1 ( 1.00x) | 47.7 ( 1.00x) alpha_8_limited_neon: | 3967.0 ( 9.47x) | 12.5 (13.53x) | 13.3 ( 3.59x) alpha_16_full_c: | 15867.9 ( 1.00x) | 64.5 ( 1.00x) | 13.7 ( 1.00x) alpha_16_full_neon: | 1256.9 (12.62x) | 7.9 ( 8.15x) | 8.3 ( 1.64x) alpha_16_limited_c: | 16723.7 ( 1.00x) | 88.7 ( 1.00x) | 103.3 ( 1.00x) alpha_16_limited_neon: | 4031.3 ( 4.15x) | 12.5 ( 7.08x) | 13.2 ( 7.86x) range_8_c: | 21819.7 ( 1.00x) | 120.0 ( 1.00x) | 9.4 ( 1.00x) range_8_neon: | 1148.3 (19.00x) | 4.3 (27.60x) | 4.8 ( 1.97x) range_16_c: | 10757.1 ( 1.00x) | 45.7 ( 1.00x) | 7.9 ( 1.00x) range_16_neon: | 1141.5 ( 9.42x) | 4.4 (10.38x) | 4.6 ( 1.72x)
FFmpeg README
FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
Libraries
libavcodecprovides implementation of a wider range of codecs.libavformatimplements streaming protocols, container formats and basic I/O access.libavutilincludes hashers, decompressors and miscellaneous utility functions.libavfilterprovides means to alter decoded audio and video through a directed graph of connected filters.libavdeviceprovides an abstraction to access capture and playback devices.libswresampleimplements audio mixing and resampling routines.libswscaleimplements 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,ismindexandqt-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.