FFmpeg used by Blockade Brigade (wave videos: .avi -> .mp4), and its source.

ffmpeg-n8.1.3-18-g46d899d7a0-win64-lgpl-8.1.zip
    The exact Windows build shipped with the game: BtbN FFmpeg-Builds, win64, LGPL, static
    (https://github.com/BtbN/FFmpeg-Builds/releases/tag/autobuild-2026-10-19-13-06).
ffmpeg-46d899d7a0-source.tar.gz
    The FFmpeg source of that build: commit 46d899d7a02bc63237472cc4897258d5ddf274ac
    (release/8.1, tag n8.1.3 + 18 commits), https://github.com/FFmpeg/FFmpeg/commit/46d899d7a0
btbn-ffmpeg-builds-autobuild-2026-10-19-13-06.tar.gz
    The build scripts that made it (BtbN/FFmpeg-Builds commit 63ac3265b0789ea16c7b1f8351cd2ad195a28722),
    which name every library version built in.
LICENSE.txt
    GNU Lesser General Public License v3.
SHA256SUMS.txt
    Checksums of the files above.

The game runs ffmpeg.exe as a separate program and does not change or link it; you may replace
the copy in <game folder>/tools/ffmpeg/ with your own build. For the source of any other part of
this build, ask the Blockade Brigade team: https://hyva.blockadebrigade.com/discuss
FFmpeg is a trademark of Fabrice Bellard; this is not an official FFmpeg product.