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Rémi Denis-Courmont 29b9d616c2 lavu/float_dsp: rework RISC-V V scalar product 
1) Take the reductive sum out of the loop,
   leaving a regular vector addition in the loop.
2) Merge the addition and the multiplication.
3) Unroll.

Before:
scalarproduct_float_rvv_f32: 832.5

After:
scalarproduct_float_rvv_f32: 275.2
 		2023-07-20 22:54:34 +03:00
compat
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doc doc/filters: Extend description of overlay filter format option values 2023-07-20 16:49:38 +02:00
ffbuild
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fftools fftools/ffmpeg: stop calling exit_program() 2023-07-20 20:47:46 +02:00
libavcodec avcodec/x86/mathops: clip constants used with shift instructions within inline assembly 2023-07-20 16:51:53 -03:00
libavdevice lavd/opengl: select the GL context before drawing 2023-07-12 15:06:15 +02:00
libavfilter avfilter/vf_overlay: Add support for yuv444p10 pixel format 2023-07-20 16:49:05 +02:00
libavformat avisynth: pass audio channel layout 2023-07-19 19:33:20 -04:00
libavutil lavu/float_dsp: rework RISC-V V scalar product 2023-07-20 22:54:34 +03:00
libpostproc
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libswresample Move bessel_i0() from swresample/resample to avutil/mathematics 2023-05-29 00:45:28 +02:00
libswscale lavu: add/use flag for RISC-V Zba extension 2023-07-19 19:29:35 +03:00
presets
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tests tests/fate: fix mismatches between requested and actually used pixel formats 2023-07-20 20:30:13 +02:00
tools tools/target_bsf_fuzzer: fix some filter names 2023-06-29 22:44:11 -03:00
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.travis.yml
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CONTRIBUTING.md
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CREDITS
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Changelog avformat/rawenc: add H266/VVC muxer 2023-06-29 14:12:50 -03:00
INSTALL.md
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LICENSE.md
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MAINTAINERS MAINTAINERS: change Leo Izen IRC nickname 2023-06-20 12:46:47 -04:00
Makefile tools: add an AV_CODEC_CAP_ENCODER_RECON_FRAME test tool 2023-03-28 13:00:42 +02:00
README.md
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RELEASE
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configure configure: bump minimum AviSynth+ header version 2023-07-19 19:33:20 -04:00

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.