Christian PillsburyandClaude Opus 4.8 6d26e083a5 feat(spf): collapse relocation tiers into shared-min default (spike) ...

Replace the per-type "Tier 1" / shared-min "Tier 2" split with one default
`deriveSharedMinStartMediaTime`: relocate every track by the `min` across the
selected A/V origins. Subsumes per-type — aligned origins reduce to each type's
own, skewed origins keep every DTS >= 0 while preserving A/V skew, and a single
selected type reduces to its own origin. Returns undefined until all selected
types are discovered (shared-min barrier). `derivePerTypeStartMediaTime` stays
as a barrier-free opt-out.

The loader stamp is now tier-agnostic: `stampStartMediaTime` applies the same
injected `derive` over `mediaContainerData` (not the raw own-origin), async with
an `awaitDefined` holdback and liveness guard. Engines resolve one
`deriveStartMediaTime` and feed it to both the reactor and
`relocationPipelinesFor(type, derive)` so model and buffer agree.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

2026-07-13 14:37:10 -07:00

..

decisions

refactor(spf): rename anchorLiveTracks to anchorPresentationTimeline

2026-06-25 10:00:46 -07:00

design

feat(spf): collapse relocation tiers into shared-min default (spike)

2026-07-13 14:37:10 -07:00