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This filter works by running the SAD function on the first plane, which works for any (native endian) format that starts with an unshifted luma plane. This notably includes formats like nv12, yuva420p, and grayscale formats, as well as luma-alpha formats. The last addition is debatable, but the precedent here is the existing support for RGBA, which also dilutes scene scores by including the alpha component in the SAD calculation). There were also some notable missing packed RGBA formats, such as ARGB, as well as 16-bit variants. This is an exhaustive listing as of the current set of formats. Tested by looping over `format=<pixfmt>,scdet` and verifying that the scene SAD score doesn't (meaningfully) change, except for expected deviations (e.g. larger scores for full range vs limited range, and lowered scores for packed alpha formats). Sponsored-by: nxtedition AB Signed-off-by: Niklas Haas <git@haasn.dev>
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.