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Rémi Denis-Courmont 96a83ceea4 riscv: fix scalar product initialisation 
VSETVLI xd, x0, ...' has rather nonobvious semantics:
- If xd is x0, then it preserves the current vector length.
- If xd is not x0, it sets the vector length to the supported maximum.

Also somewhat confusingly, while VMV.X.S always does its thing
regardless of the selected vector length, VMV.S.X does _nothing_ if the
selected vector length is zero.

So the current code breaks fails to initialise the accumulator if we
are unlucky to have a selected vector length of zero on entry. Fix it
by forcing the vector length to one.
2022-10-13 10:17:38 +02:00
compat compat/cuda: switch from powf to __powf intrinsic 2022-09-03 20:27:34 +02:00
doc avutil/pixfmt.h: add native-endian RGB32F and RGBA32F formats 2022-10-11 16:31:15 -03:00
ffbuild configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
fftools fftools/ffmpeg: move some code from init_output_stream() to init_output_stream_encode() 2022-10-04 11:55:03 +02:00
libavcodec riscv: fix scalar product initialisation 2022-10-13 10:17:38 +02:00
libavdevice avformat/internal: Don't include avcodec.h 2022-09-26 03:02:50 +02:00
libavfilter avfilter/af_aspectralstats: allow to select subset of measurements 2022-10-11 18:14:06 +02:00
libavformat avformat/mp3dec: remove a call to avio_tell() 2022-10-08 22:56:30 +08:00
libavutil riscv: fix scalar product initialisation 2022-10-13 10:17:38 +02:00
libpostproc configure: always enable gnu_windres if available 2022-08-13 14:42:36 +02:00
libswresample swsresample/swresample: error out on invalid layouts 2022-09-14 09:52:33 -03:00
libswscale sws/rgb2rgb: RISC-V 64-bit V packed YUYV/UYVY to planar 4:2:2 2022-09-30 07:25:44 +02:00
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Changelog avcodec: add a bsf to reorder DTS into PTS 2022-10-04 08:40:16 -03:00
configure avcodec/snow: Move initializing MotionEstContext to snowenc.c 2022-10-12 10:58:15 +02:00
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LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS MAINTAINERS: remove the project leader section 2022-09-23 16:06:11 +02:00
Makefile configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
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.