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v10/packages
Christian PillsburyandClaude Opus 4.8 7c99f266a6 fix(spf): pin the buffer anchor to the trailing edge to avoid a mid-append off-by-one
bufferedAnchorFor paired the newest appended segment with maxBufferedEnd, but
appendSegment streams one appendBuffer per chunk, so the newest segment's bytes
are only partway into `buffered` mid-append — mis-reading its native start by up
to a full segment, skewing the derived anchor ~2s and shifting the whole model
timeline. seg0 went negative on a window anchored at the origin, so
setLiveSeekableRange threw every reload and back-seek stalled in the gap. Pin to
the trailing edge instead (earliest settled segment + minBufferedStart), which
only moves on eviction, and exclude partial (still-appending) segments — the
actor already flags them. Intermittent and live-only; exposed by DVR/EVENT
growing windows, masked at the live edge.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-25 10:00:46 -07:00
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