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Jake Fineman
611cec792a
Commits0cd75dbfa0and27e94281d1added QueryInterface() implementations that compare the requested interface against IID_IUnknown. The Linux SDK defines it in LinuxCOM.h and the Windows SDK gets it from the platform COM headers, but the macOS SDK uses CoreFoundation's COM types from <CoreFoundation/CFPlugInCOM.h>, which only provide IUnknownUUID as a CFUUIDRef. Since then, building with --enable-decklink on macOS fails: libavdevice/decklink_dec.cpp:138:43: error: use of undeclared identifier 'IID_IUnknown' libavdevice/decklink_dec.cpp:603:43: error: use of undeclared identifier 'IID_IUnknown' libavdevice/decklink_enc.cpp:120:39: error: use of undeclared identifier 'IID_IUnknown' libavdevice/decklink_enc.cpp:181:39: error: use of undeclared identifier 'IID_IUnknown' On macOS, REFIID is CFUUIDBytes, so derive IID_IUnknown from IUnknownUUID with CFUUIDGetUUIDBytes(), the same definition used by the macOS samples shipped with the DeckLink SDK. This avoids duplicating the GUID bytes, and CFUUIDGetConstantUUIDWithBytes() returns a constant that must not be released. The definition is limited to __APPLE__, so Linux and Windows builds are unchanged. Tested with DeckLink SDK 16.0 and Apple clang 21 on macOS arm64. Signed-off-by: Jake Fineman <jake@wave.online> (cherry picked from commit215351c1c3)
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.