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Rémi Denis-Courmont
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lavc/h264dsp: R-V V add_pixels4 and 8-bit add_pixels8
T-Head C908 (cycles): h264_add_pixels4_8bpp_c: 93.5 h264_add_pixels4_8bpp_rvv_i32: 39.5 h264_add_pixels4_9bpp_c: 87.5 h264_add_pixels4_9bpp_rvv_i64: 50.5 h264_add_pixels4_10bpp_c: 87.5 h264_add_pixels4_10bpp_rvv_i64: 50.5 h264_add_pixels4_12bpp_c: 87.5 h264_add_pixels4_12bpp_rvv_i64: 50.5 h264_add_pixels4_14bpp_c: 87.5 h264_add_pixels4_14bpp_rvv_i64: 50.5 h264_add_pixels8_8bpp_c: 265.2 h264_add_pixels8_8bpp_rvv_i64: 84.5
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FFmpeg README
FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
Libraries
libavcodec
provides implementation of a wider range of codecs.libavformat
implements streaming protocols, container formats and basic I/O access.libavutil
includes hashers, decompressors and miscellaneous utility functions.libavfilter
provides means to alter decoded audio and video through a directed graph of connected filters.libavdevice
provides an abstraction to access capture and playback devices.libswresample
implements audio mixing and resampling routines.libswscale
implements 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
,ismindex
andqt-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.
Languages
C
90.3%
Assembly
7.8%
Makefile
1.3%
C++
0.2%
Objective-C
0.2%
Other
0.1%