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As with the inter loop filter, performance metrics seem to be biased in favour of the C implementation because checkasm inputs almost always fall in the no-op case. h264_h_loop_filter_chroma_intra_8bpp_c: 82.8 ( 1.00x) h264_h_loop_filter_chroma_intra_8bpp_rvv_i32: 72.6 ( 1.14x) h264_h_loop_filter_chroma_mbaff_intra_8bpp_c: 41.1 ( 1.00x) h264_h_loop_filter_chroma_mbaff_intra_8bpp_rvv_i32: 72.6 ( 0.57x) h264_h_loop_filter_luma_intra_8bpp_c: 166.1 ( 1.00x) h264_h_loop_filter_luma_intra_8bpp_rvv_i32: 395.4 ( 0.42x) h264_h_loop_filter_luma_mbaff_intra_8bpp_c: 93.3 ( 1.00x) h264_h_loop_filter_luma_mbaff_intra_8bpp_rvv_i32: 395.4 ( 0.24x) h264_v_loop_filter_chroma_intra_8bpp_c: 134.8 ( 1.00x) h264_v_loop_filter_chroma_intra_8bpp_rvv_i32: 51.6 ( 2.61x) h264_v_loop_filter_luma_intra_8bpp_c: 468.1 ( 1.00x) h264_v_loop_filter_luma_intra_8bpp_rvv_i32: 134.8 ( 3.47x)
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.