# TRAKCAST FFmpeg compliance bundle

TRAKCAST invokes FFmpeg as a separate executable through bounded PCM stdin and MP3 stdout pipes. TRAKCAST does not link FFmpeg libraries into its proprietary application code, and inclusion of this executable does not claim that TRAKCAST itself is licensed under the LGPL.

The shipped encoder is FFmpeg 7.1.1 with LAME 3.100, built for macOS arm64. It reports `LGPL version 2.1 or later`; neither `--enable-gpl` nor `--enable-nonfree` is enabled. LAME is statically included solely to provide the `libmp3lame` encoder. The corresponding license texts are in `licenses/`.

Exact source and archive SHA-256 values are recorded in `manifest.json`. Obtain the corresponding source using the HTTPS URLs in that manifest, verify each archive with `shasum -a 256`, then run `scripts/build-macos-arm64.sh` from the repository root. No patches are applied.

The release website must host the exact corresponding FFmpeg and LAME source archives alongside the TRAKCAST download, or link to TRAKCAST-hosted copies that remain available for the required compliance period. See `website-download-notice.html` for the prepared download-page notice. This bundle implements an engineering compliance baseline and is not final legal advice or approval.