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Rémi Denis-Courmont b710f881ce lavu/float_dsp: unroll RISC-V V loops 
butterflies_float_c: 1057.0
butterflies_float_rvv_f32: 351.0 (before)
butterflies_float_rvv_f32: 329.5 (after)

vector_dmac_scalar_c: 819.0
vector_dmac_scalar_rvv_f64: 670.5 (before)
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vector_dmul_c: 800.2
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vector_dmul_scalar_c: 545.7
vector_dmul_scalar_rvv_f64: 670.7 (before)
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vector_fmac_scalar_c: 804.5
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vector_fmul_scalar_c: 546.0
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README.md

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 and qt-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.