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Test on Apple M1 with kperf: : -O3 : -O3 -fno-vectorize abgr_to_uv_8_c : 19.4 : 26.1 abgr_to_uv_8_neon : 29.9 : 51.1 abgr_to_uv_128_c : 146.4 : 558.9 abgr_to_uv_128_neon : 85.1 : 83.4 abgr_to_uv_1080_c : 1162.6 : 4786.4 abgr_to_uv_1080_neon : 819.6 : 826.6 abgr_to_uv_1920_c : 2063.6 : 8492.1 abgr_to_uv_1920_neon : 1435.1 : 1447.1 abgr_to_uv_half_8_c : 16.4 : 11.4 abgr_to_uv_half_8_neon : 35.6 : 20.4 abgr_to_uv_half_128_c : 108.6 : 359.4 abgr_to_uv_half_128_neon : 75.4 : 42.6 abgr_to_uv_half_1080_c : 883.4 : 2885.6 abgr_to_uv_half_1080_neon : 460.6 : 481.1 abgr_to_uv_half_1920_c : 1553.6 : 5106.9 abgr_to_uv_half_1920_neon : 817.6 : 820.4 abgr_to_y_8_c : 6.1 : 26.4 abgr_to_y_8_neon : 40.6 : 6.4 abgr_to_y_128_c : 99.9 : 390.1 abgr_to_y_128_neon : 67.4 : 55.9 abgr_to_y_1080_c : 735.9 : 3170.4 abgr_to_y_1080_neon : 534.6 : 536.6 abgr_to_y_1920_c : 1279.4 : 6016.4 abgr_to_y_1920_neon : 932.6 : 927.6 Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
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.