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Test on Apple M1: rgb24_to_uv_8_c: 0.0 rgb24_to_uv_8_neon: 0.2 rgb24_to_uv_128_c: 1.0 rgb24_to_uv_128_neon: 0.5 rgb24_to_uv_1080_c: 7.0 rgb24_to_uv_1080_neon: 5.7 rgb24_to_uv_1920_c: 12.5 rgb24_to_uv_1920_neon: 9.5 rgb24_to_uv_half_8_c: 0.2 rgb24_to_uv_half_8_neon: 0.2 rgb24_to_uv_half_128_c: 1.0 rgb24_to_uv_half_128_neon: 0.5 rgb24_to_uv_half_1080_c: 6.2 rgb24_to_uv_half_1080_neon: 3.0 rgb24_to_uv_half_1920_c: 11.2 rgb24_to_uv_half_1920_neon: 5.2 rgb24_to_y_8_c: 0.2 rgb24_to_y_8_neon: 0.0 rgb24_to_y_128_c: 0.5 rgb24_to_y_128_neon: 0.5 rgb24_to_y_1080_c: 4.7 rgb24_to_y_1080_neon: 3.2 rgb24_to_y_1920_c: 8.0 rgb24_to_y_1920_neon: 5.7 On Pixel 6: rgb24_to_uv_8_c: 30.7 rgb24_to_uv_8_neon: 56.9 rgb24_to_uv_128_c: 213.9 rgb24_to_uv_128_neon: 173.2 rgb24_to_uv_1080_c: 1649.9 rgb24_to_uv_1080_neon: 1424.4 rgb24_to_uv_1920_c: 2907.9 rgb24_to_uv_1920_neon: 2480.7 rgb24_to_uv_half_8_c: 36.2 rgb24_to_uv_half_8_neon: 33.4 rgb24_to_uv_half_128_c: 167.9 rgb24_to_uv_half_128_neon: 99.4 rgb24_to_uv_half_1080_c: 1293.9 rgb24_to_uv_half_1080_neon: 778.7 rgb24_to_uv_half_1920_c: 2292.7 rgb24_to_uv_half_1920_neon: 1328.7 rgb24_to_y_8_c: 19.7 rgb24_to_y_8_neon: 27.7 rgb24_to_y_128_c: 129.9 rgb24_to_y_128_neon: 96.7 rgb24_to_y_1080_c: 995.4 rgb24_to_y_1080_neon: 767.7 rgb24_to_y_1920_c: 1747.4 rgb24_to_y_1920_neon: 1337.2 Note both tests use clang as compiler, which has vectorization enabled by default with -O3. Reviewed-by: Rémi Denis-Courmont <remi@remlab.net> Reviewed-by: Martin Storsjö <martin@martin.st> 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.