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lusoris
a7206f6ba3
scale_vulkan calls sws_alloc_context(), sws_scale_frame() and sws_free_context(), and scale_vulkan_filter_deps lists swscale, but the conditional library dependency list has no entry for the filter. A build with only this filter enabled sets avfilter_FFLIBS=avutil, so a shared libavfilter has no libswscale NEEDED entry and a consumer linked with -Wl,--no-allow-shlib-undefined fails on the three sws_* symbols. With this entry avfilter_FFLIBS=swscale avutil and the consumer links and runs with LD_BIND_NOW=1. A standalone scale_vulkan build also needs scale_eval.o, which "avfilter/Makefile: add missing objects for standalone Vulkan filters" adds. Signed-off-by: lusoris <lusoris@proton.me>
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 Forgejo or 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.
See https://ffmpeg.org/developer.html for more information.