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The previous chroma stride formula (width >> log2_chroma_w) is correct for planar yuv but wrong for semi-planar nv12/nv21, where the UV plane is interleaved at width bytes per row (width/2 UV pairs of 2 bytes each). Use av_image_get_linesize() so the test feeds a valid stride to libswscale regardless of input format; for the existing planar suites the value is unchanged. With the stride fixed, add nv12 and nv21 to check_yuv2rgb() so the upcoming NEON 16bpp paths get bench coverage. ff_get_unscaled_swscale does not wire a C yuv2rgb fast path for these inputs, so the suites report bench-only (no correctness reference); they still run clobber detection and cycle counts. Signed-off-by: DROOdotFOO <drew@axol.io>
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.