local-live.sh generates a sliding-window demuxed CMAF/fMP4 live stream with
ffmpeg's HLS muxer (master + EXT-X-MEDIA audio group + fMP4 init/segments) to a
temp dir, served with CORS and no caching — a no-creds local live source for the
SPF engine and the hls.js/native sandbox pages. Documents the no-cache
requirement (a positive max-age on a live playlist freezes the client's window —
a server misconfiguration, not a player bug).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
