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Hao Chen 38cacce22a
swscale/la: Optimize hscale functions with lasx. 
ffmpeg -i 1_h264_1080p_30fps_3Mbps.mp4 -f rawvideo -s 640x480 -y /dev/null -an
before: 101fps
after:  138fps

Signed-off-by: Hao Chen <chenhao@loongson.cn>
Reviewed-by: yinshiyou-hf@loongson.cn
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2022-09-10 22:56:38 +02:00
compat compat/cuda: switch from powf to __powf intrinsic 2022-09-03 20:27:34 +02:00
doc libavcodec/qsvenc: Add low_delay_brc reset support to qsvenc 2022-09-09 09:39:44 +08:00
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fftools fftools/ffprobe: Report initial and trailing padding 2022-09-05 20:32:12 +02:00
libavcodec avcodec/fmvc: Move frame allocation to a later stage 2022-09-10 17:32:38 +02:00
libavdevice avutil/internal: Move avpriv-file API to a header of its own 2022-09-03 15:41:44 +02:00
libavfilter avfilter/vf_gblur: allow filtering with zero horizontal sigma 2022-09-10 22:11:38 +02:00
libavformat libavformat/hls: Free keys 2022-09-10 17:32:47 +02:00
libavutil lavu/tx: rotate 3 & 15-point exptabs 2022-09-10 02:37:17 +02:00
libpostproc configure: always enable gnu_windres if available 2022-08-13 14:42:36 +02:00
libswresample lswr: take const AVChannelLayout* in swr_alloc_set_opts2() 2022-08-24 18:31:05 -05:00
libswscale swscale/la: Optimize hscale functions with lasx. 2022-09-10 22:56:38 +02:00
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Changelog lavc/vaapi: Add support for remaining 10/12bit profiles 2022-09-03 16:19:40 -07:00
configure lavf/dv: always provide avpriv_dv_* symbols 2022-09-05 08:01:17 +02:00
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README.md
RELEASE RELEASE: update after 5.1 branch 2022-07-13 00:31:42 +02:00

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.