V-con uses unmodified @ffmpeg/core 0.12.10 (single-thread), GPL-2.0-or-later.
Binary package: https://registry.npmjs.org/@ffmpeg/core/-/core-0.12.10.tgz
Build source and scripts: source-v0.12.10.tar.gz in this directory.
Upstream: https://github.com/ffmpegwasm/ffmpeg.wasm/tree/v0.12.10
Build: docker buildx build --build-arg FFMPEG_ST=yes -o . .
The archive Dockerfile identifies upstream dependency versions and source repositories.
FFmpeg source: https://github.com/FFmpeg/FFmpeg/tree/n5.1.4
Dependencies: x264, x265, libvpx, LAME, Ogg, Theora, Opus, Vorbis,
zlib, libwebp, FreeType, FriBidi, HarfBuzz, libass and zimg.
Their original license notices are in their source repositories identified in Dockerfile.
This engine is run in an isolated browser Worker. No user audio is sent to a server.