...Our binaries are compiled using GitHub Actions and made available on SoureForge for download. See https://github.com/mannyamorim/ffmpeg-windows-builds for more info. Nightly builds start at midnight UTC and are available about 2 hours later. Release builds are manually triggered when new releases are made available by FFmpeg.
We are providing static and shared, 64-bit windows builds, with GPL enabled. More build types to come.
Credit to Roger Pack for the build scripts https://github.com/rdp/ffmpeg-windows-build-helpers.