{
  "id": "sustained-sana-frame-alignment-v2",
  "recorded_at": "2026-10-16T11:44:17.388621+00:00",
  "phase": "Before any primary sustained landmark or camera scoring",
  "original_registration_sha256": "18ca93d69d988d8ab1b520cdc97974b31d4a64c9942c72c528209517ab20daa0",
  "source": {
    "url": "https://github.com/NVlabs/Sana/blob/0354b3d88a9b60a129213863f687da95d00fb108/inference_video_scripts/wm/streaming_pipeline.py",
    "sha256": "269da95bc26ff3a74b299bcf183846ef66741545839eb5736761f615bafffce7"
  },
  "issue": "Native SANA drops its conditioning pixel. Output index i corresponds to supplied camera index i+1. Original worker snapshot files used common output indices, one frame later than the intended matched return timestamp.",
  "correction": "Preserve original raw videos and worker snapshots. For SANA score registered camera timestamp f using saved output frame f-1; evaluate interframe motion against camera poses[1:1+n_output]. MG3 retains frame f and poses[0:n_output].",
  "rationale": "Source-defined alignment correction, independent of visual quality or scores; no generator, seed, action schedule, rubric or landmark changed.",
  "publication": "Disclose this pre-scoring implementation correction beside the final sustained studies."
}