mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2026-08-10 07:37:43 +00:00
Jun Zhao
2f209337fc
The MOV demuxer only handled the low four bits of ChannelLayout and did not expose the DTS profile carried by StreamConstruction. It also discarded the sample-entry channel count when ChannelLayout was zero. Parse StreamConstruction, RepresentationType, and all 16 ChannelLayout bits according to ETSI TS 102 114. Map StreamConstruction to the corresponding FFmpeg DTS profile, and preserve the sample-entry channel count for zero layouts unless RepresentationType explicitly signals two encoded channels. This also provides profile and channel metadata for encrypted samples whose frame headers cannot be inspected. Signed-off-by: Jun Zhao <barryjzhao@tencent.com>
FFmpeg README
FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
Libraries
libavcodecprovides implementation of a wider range of codecs.libavformatimplements streaming protocols, container formats and basic I/O access.libavutilincludes hashers, decompressors and miscellaneous utility functions.libavfilterprovides means to alter decoded audio and video through a directed graph of connected filters.libavdeviceprovides an abstraction to access capture and playback devices.libswresampleimplements audio mixing and resampling routines.libswscaleimplements 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,ismindexandqt-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.