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v10/internal/design/spf/features/dvr-event-stream-support.md

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status, date, definition
status date definition
draft 2026-05-20 technical

DVR and event-stream support

Support growing HLS event playlists with a seekable back window and a clean transition to a completed presentation.

Proposed direction

  • Build on the live playlist reload lifecycle.
  • Derive seekable range from retained segments rather than wall-clock duration.
  • Preserve playback position as the window grows or slides.
  • Transition to VOD-style completion when the playlist ends.

Before implementation

Define window eviction, duration reporting, live-edge behavior, and event-to-VOD transition semantics. Test back-seeks across reloads, discontinuities, and playlist completion.

Live stream support and LL-HLS support.