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Rémi Denis-Courmont df2057041b lavu/riscv: byte-swap operations 
If the target supports the Basic bit-manipulation (Zbb) extension, then
the REV8 instruction is available to reverse byte order.

Note that this instruction only exists at the "XLEN" register size,
so we need to right shift the result down to the data width.

If Zbb is not supported, then this patchset does nothing. Support for
run-time detection is left for the future. Currently, there are no
bits in auxv/ELF HWCAP for Z-extensions, so there are no clean ways to
do this.
2022-09-13 16:50:43 -03:00
compat compat/cuda: switch from powf to __powf intrinsic 2022-09-03 20:27:34 +02:00
doc doc: reference the RISC-V specification 2022-09-13 16:50:43 -03:00
ffbuild ffbuild/common: Fix CPPFLAGS applied for compiling C++ files 2022-05-24 21:30:52 +02:00
fftools fftools/ffprobe: Report initial and trailing padding 2022-09-05 20:32:12 +02:00
libavcodec avcodec/x86/audiodsp: add scalarproduct avx2 2022-09-13 17:43:16 +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 avformat: add bonk demuxer 2022-09-12 11:35:43 +02:00
libavutil lavu/riscv: byte-swap operations 2022-09-13 16:50:43 -03:00
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: Add output_lasx.c file. 2022-09-10 22:56:39 +02:00
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tests fate/spdif: Add spdif tests 2022-09-13 14:50:01 +02:00
tools tools/target_dec_fuzzer: Adjust threshold for UTVIDEO 2022-09-10 17:32:47 +02:00
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.gitignore gitignore: add config_components.h 2022-03-17 18:35:41 -03:00
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Changelog avformat: add bonk demuxer 2022-09-12 11:35:43 +02:00
configure configure/riscv: detect fast CLZ 2022-09-13 16:50:43 -03:00
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MAINTAINERS MAINTAINERS: Add ED25519 key for signing my commits in the future 2022-08-09 21:57:31 +02:00
Makefile Makefile: Prompt for reconfigure on lavc/hwaccels.h modification 2022-07-01 00:34:38 +02:00
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.