b8b71be07a
Test on Apple M1 with kperf : -O3 : -O3 -fno-vectorize bgr24_to_uv_8_c : 28.5 : 52.5 bgr24_to_uv_8_neon : 54.5 : 59.7 bgr24_to_uv_128_c : 294.0 : 830.7 bgr24_to_uv_128_neon : 99.7 : 112.0 bgr24_to_uv_1080_c : 965.0 : 6624.0 bgr24_to_uv_1080_neon : 751.5 : 754.7 bgr24_to_uv_1920_c : 1693.2 : 11554.5 bgr24_to_uv_1920_neon : 1292.5 : 1307.5 bgr24_to_uv_half_8_c : 54.2 : 37.0 bgr24_to_uv_half_8_neon : 27.2 : 22.5 bgr24_to_uv_half_128_c : 127.2 : 392.5 bgr24_to_uv_half_128_neon : 63.0 : 52.0 bgr24_to_uv_half_1080_c : 880.2 : 3329.0 bgr24_to_uv_half_1080_neon : 401.5 : 390.7 bgr24_to_uv_half_1920_c : 1585.7 : 6390.7 bgr24_to_uv_half_1920_neon : 694.7 : 698.7 bgr24_to_y_8_c : 21.7 : 22.5 bgr24_to_y_8_neon : 797.2 : 25.5 bgr24_to_y_128_c : 88.0 : 280.5 bgr24_to_y_128_neon : 63.7 : 55.0 bgr24_to_y_1080_c : 616.7 : 2208.7 bgr24_to_y_1080_neon : 900.0 : 452.0 bgr24_to_y_1920_c : 1093.2 : 3894.7 bgr24_to_y_1920_neon : 777.2 : 767.5 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.