Targets, Variants and Addins

Available targets:

• win64 (x86_64 Windows)
• win32 (x86 Windows)
• linux64 (x86_64 Linux, glibc>=2.28, linux>=4.18)
• linuxarm64 (arm64 (aarch64) Linux, glibc>=2.28, linux>=4.18)

The linuxarm64 target will not build some dependencies due to lack of arm64 (aarch64) architecture support or cross-compiling restrictions.

• davs2 and xavs2: aarch64 support is broken.
• libmfx and libva: Library for Intel QSV, so there is no aarch64 support.

Available variants:

• gpl Includes all dependencies, even those that require full GPL instead of just LGPL.
• lgpl Lacking libraries that are GPL-only. Most prominently libx264 and libx265.
• nonfree Includes fdk-aac in addition to all the dependencies of the gpl variant.
• gpl-shared Same as gpl, but comes with the libav* family of shared libs instead of pure static executables.
• lgpl-shared Same again, but with the lgpl set of dependencies.
• nonfree-shared Same again, but with the nonfree set of dependencies.

All of those can be optionally combined with any combination of addins:

• 4.4/5.0/5.1/6.0/6.1/7.0 to build from the respective release branch instead of master.
• debug to not strip debug symbols from the binaries. This increases the output size by about 250MB.
• lto build all dependencies and ffmpeg with -flto=auto (HIGHLY EXPERIMENTAL, broken for Windows, sometimes works for Linux)