FFmpeg 8.1, unmodified upstream source; macOS arm64
PKG_CONFIG_PATH= PKG_CONFIG_LIBDIR= ../src/ffmpeg-8.1/configure --disable-autodetect --enable-pthreads --enable-videotoolbox --enable-zlib --disable-network --disable-ffplay --disable-doc --disable-encoders --enable-encoder=mjpeg,pcm_s16le,pcm_s24le,pcm_f32le,h264_videotoolbox,wrapped_avframe --extra-cflags=-mmacosx-version-min=12.0 --extra-ldflags=-mmacosx-version-min=12.0
make -j10
{
  "version": "8.1",
  "tarballUrl": "https://ffmpeg.org/releases/ffmpeg-8.1.tar.xz",
  "tarballSha256": "b072aed6871998cce9b36e7774033105ca29e33632be5b6347f3206898e0756a",
  "crossCheck": {
    "path": "/opt/homebrew/Cellar/ffmpeg/8.1_1/.brew/ffmpeg.rb",
    "sha256": "b072aed6871998cce9b36e7774033105ca29e33632be5b6347f3206898e0756a",
    "matched": true
  },
  "signature": {
    "sha256": "69623c59384d4e9a387c962722083403e528bb0c86ac89de4714da5b284e0adb",
    "verified": false
  },
  "configureFlags": [
    "--disable-autodetect",
    "--enable-pthreads",
    "--enable-videotoolbox",
    "--enable-zlib",
    "--disable-network",
    "--disable-ffplay",
    "--disable-doc",
    "--disable-encoders",
    "--enable-encoder=mjpeg,pcm_s16le,pcm_s24le,pcm_f32le,h264_videotoolbox,wrapped_avframe",
    "--extra-cflags=-mmacosx-version-min=12.0",
    "--extra-ldflags=-mmacosx-version-min=12.0"
  ],
  "configureLine": "PKG_CONFIG_PATH= PKG_CONFIG_LIBDIR= ../src/ffmpeg-8.1/configure --disable-autodetect --enable-pthreads --enable-videotoolbox --enable-zlib --disable-network --disable-ffplay --disable-doc --disable-encoders --enable-encoder=mjpeg,pcm_s16le,pcm_s24le,pcm_f32le,h264_videotoolbox,wrapped_avframe --extra-cflags=-mmacosx-version-min=12.0 --extra-ldflags=-mmacosx-version-min=12.0",
  "clearedEnvironment": {
    "CFLAGS": null,
    "CXXFLAGS": null,
    "LDFLAGS": null,
    "CPPFLAGS": null,
    "CPATH": null,
    "LIBRARY_PATH": null,
    "C_INCLUDE_PATH": null
  },
  "clang": "Apple clang version 21.0.0 (clang-2100.0.123.102)\nTarget: arm64-apple-darwin25.2.0\nThread model: posix\nInstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin",
  "sdk": "26.4",
  "minos": "12.0",
  "startedAt": "2026-10-02T07:44:53.789Z",
  "configuredAt": "2026-10-02T07:45:36.532Z",
  "completedAt": "2026-10-02T07:46:25.710Z",
  "make": "make -j10",
  "hashMode": "b",
  "hashReason": "D7 linker/ad-hoc signature removal produced different hashes; byte-hash enforcement omitted as ruled.",
  "binaries": {
    "ffmpeg": {
      "bytes": 20090024,
      "sha256": "0004ecbb1efaa8a84ecc9ab384c2df0e82c20a528165c8fbdc8d3afe79ea9509",
      "strippedSha256": "c32d228b106357e8e04afd625b3960a4ea247e4b3a6dd392f0397b672ce525d9",
      "resignedStrippedSha256": "4e2dbcc125ac2a5f9df0d8846c2047ba2cca4123f1c54036c836797f10bbc592",
      "unstrippedDebugSha256": "1e218b2d315ab958c2db23602b023f2f60c1b9267fcb105a497f36389eb033b3"
    },
    "ffprobe": {
      "bytes": 19914696,
      "sha256": "0097dd2b4f3813ea2093bb684233fec9b78f427051ecf27d479f16e2696dc0ae",
      "strippedSha256": "fe4bf7343a0594a5b827a0e82fbc870ec477fe01242448e8fd38b345d8e2400d",
      "resignedStrippedSha256": "2bc1c40994b1aba24a9eec48b7f4ffca6c2a06611e76f77f4a5ee2f7f575791b",
      "unstrippedDebugSha256": "b2cefdf70166580c5bbbd1645e2a2639e69c5c4fb2f88a3af4a9e0ab43453cc5"
    }
  },
  "licenceTexts": {
    "COPYING.LGPLv2.1": "246041b6ecf9bc32d718a62c57877c78b5eb397b6467e74ed7ae2626ab189c30",
    "LICENSE.md": "2e1d16c72fd74e12063776371da757322f8b77589386532f4fd8634bde7de1af"
  }
}

Build scripts belong in scripts/ of the lane layout; downloads belong in native/ffmpeg/. No install. Detached signature unverified. Minimum macOS 12.0 has not been exercised on this Mac.