mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2026-01-06 22:25:36 +01:00
96d2a40b9e
PGMYUV seems to be always limited range. This was a format originally invented by FFmpeg at a time when YUVJ distinguished limited from full range YUV, and this codec never appeared to output YUVJ in any circumstance, so hard-coding limited range preserves the status quo. The other formats are explicitly documented to be full range RGB/gray formats. That said, don't tag them yet, due to outstanding bugs w.r.t grayscale formats and color range handling. This change in behavior updates a bunch of FATE tests in trivial ways (added tagging being the only difference).
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.