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Add NEAR_ZERO_ORIGIN_THRESHOLD (1s, absolute) to the derive: a shared/per-type origin below the threshold — including negatives — resolves to 0, so ordinary ~0-PTS VOD is left on its native timeline and no timestampOffset is set (the loader stamp already no-ops on a derived 0). Relocation stays targeted at streams with an intentional large origin (instant clips, bipbop @10s). Absolute basis, not proportional: the DTS-below-zero / edge-ripple risk scales with the origin's absolute size, not the presentation's duration. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>