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Jan Ekström 02ddfeadbe avformat/movenc: allow writing out channel count in MP4 and 3GP 
ISOBMFF (14496-12) made this field ('channelcount') in the
AudioSampleEntry structure non-template¹ somewhere before the
release of the 2022 edition. As for ETSI TS 126 244 AKA 3GPP
file format (V16.1.0, 2020-10), it does not seem contain any
references limiting the channelcount entry in AudioSampleEntry
or in its own definition of EVSSampleEntry.

fate-mov-mp4-chapters test had to be adjusted as it output a
mono vorbis stream, which would now be properly marked as such
in the container.

1: As per 14496-12:
   Fields shown as “template” in the box descriptions are fields
   which are coded with a default value unless a derived
   specification defines their use and permits writers to use
   other values than the default.
2023-02-14 21:10:42 +02:00
compat compat: Use '-' instead of '/' for rc.exe options 2023-02-13 13:49:40 +02:00
doc avutil/frame: deprecate AVFrame.coded_picture_number and display_picture_number 2023-02-13 00:37:50 +01:00
ffbuild configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
fftools avutil/frame: deprecate AVFrame.coded_picture_number and display_picture_number 2023-02-13 00:37:50 +01:00
libavcodec avcodec/rka: add u8 sample format support 2023-02-13 21:13:22 +01:00
libavdevice Bump major versions of all libraries 2023-02-09 15:35:14 +01:00
libavfilter vf_yadif: Remove unused emms_c 2023-02-14 19:09:19 +00:00
libavformat avformat/movenc: allow writing out channel count in MP4 and 3GP 2023-02-14 21:10:42 +02:00
libavutil avutil/frame: deprecate AVFrame.coded_picture_number and display_picture_number 2023-02-13 00:37:50 +01:00
libpostproc Bump major versions of all libraries 2023-02-09 15:35:14 +01:00
libswresample x86: replace explicit REP_RETs with RETs 2023-02-01 04:23:55 +01:00
libswscale Bump major versions of all libraries 2023-02-09 15:35:14 +01:00
presets
tests avformat/movenc: allow writing out channel count in MP4 and 3GP 2023-02-14 21:10:42 +02:00
tools avcodec: add AVCodecContext.frame_num as 64 bit variant to frame_number 2023-02-13 00:36:46 +01:00
.gitattributes
.gitignore gitignore: add config_components.h 2022-03-17 18:35:41 -03:00
.mailmap mailmap: stop git lying about who I commit things as 2022-11-04 19:37:46 +01:00
.travis.yml
Changelog fftools/ffmpeg: add special syntax for loading filter options from files 2023-02-12 10:34:45 +01:00
configure examples: rename transcoding to transcode 2023-02-11 17:49:01 +01:00
CONTRIBUTING.md
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INSTALL.md
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MAINTAINERS MAINTAINERS: add maintainer for the imf demuxer 2023-02-13 18:41:22 +01:00
Makefile configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +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.