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Andreas Rheinhardt 4d9c0b3efa configure: Add (h264|hevc)_sei subsystems 
Currently, several components select atsc_a53, despite
not using anything from it themselves. They only select
it because parsing SEI messages adds an indirect dependency.
But using direct dependencies is more natural, so add
dedicated subsystems for them.

It already allows to remove a superfluous dependency of
the HEVC QSV encoder on hevc_sei and atsc_a53.

Adding new subsystems only becomes effective after a reconfiguration.
In order to force this, some needed headers (which are only included
implicitly before this commit) were included explicitly in
libavformat/allformats.c.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-12-01 11:00:40 +01:00
compat compat/cuda: switch from powf to __powf intrinsic 2022-09-03 20:27:34 +02:00
doc avfilter/avf_showcwt: add yet another mode variant 2022-11-30 20:08:18 +01:00
ffbuild configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
fftools fftools/ffmpeg: cosmetics 2022-11-28 10:28:14 +01:00
libavcodec configure: Add (h264|hevc)_sei subsystems 2022-12-01 11:00:40 +01:00
libavdevice avdevice/avfoundation: convert to new channel layout-API 2022-11-08 14:08:05 -03:00
libavfilter lavfi/vf_vpp_qsv: scale_mode can be applied to color conversion 2022-12-01 09:40:40 +08:00
libavformat configure: Add (h264|hevc)_sei subsystems 2022-12-01 11:00:40 +01:00
libavutil avutil/tx: Use unsigned in ff_tx_fft_sr_combine() to avoid undefined behavior 2022-11-28 20:58:05 +01:00
libpostproc postproc/postprocess_template: Fix alignment 2022-11-09 17:39:00 +01:00
libswresample swresample/rematrix: support mixing top front left/right channels 2022-11-03 19:39:52 -03:00
libswscale swscale/utils: Fix indentation 2022-11-24 21:02:57 +01:00
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tests fate/aacenc: increase tolerance for ln-128k test 2022-11-24 15:58:22 +01:00
tools tools/target_dec_fuzzer: Adjust threshold for FFV1 2022-10-20 21:42:21 +02:00
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Changelog avfilter: add showcwt multimedia filter 2022-11-28 23:18:03 +01:00
configure configure: Add (h264|hevc)_sei subsystems 2022-12-01 11:00:40 +01:00
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LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS MAINTAINERS: add myself as amfenc* maintainer 2022-11-10 16:28:07 +01:00
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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.