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v10/internal/design/spf/features/ll-hls-support.md

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status date definition
draft 2026-05-20 technical

LL-HLS support

Extend live HLS playback with partial segments, preload hints, server-control directives, and blocking reload.

Proposed direction

  • Build on the normal live reload and timeline model.
  • Represent parts without creating a parallel track model.
  • Treat preload hints as provisional work that can be cancelled or replaced.
  • Respect server hold-back and blocking-reload policy.

Before implementation

Define part identity, append ordering, rendition reports, skip support, fallback to regular HLS, and latency control. Verify missed parts, stale hints, discontinuities, and servers with partial LL-HLS support.

Live stream support and DVR and event-stream support.