Datasets:

maxwellinked
/

time-lapse-artifacts

all 338 canonical Standard rows and direct Standard MP4 paths
all 129 active Pre-Standard rows and direct Pre-Standard MP4 paths
persistent record identity and cross-tier uniqueness
exact Hub Xet file IDs and stored byte sizes
container-header technical metadata for every active published MP4
repository membership, filename rules, field types, numeric ranges, and stored-orientation consistency

No video payload was replaced, renamed, transcoded, or uploaded in this metadata-only release candidate. Pre-Standard technical properties were read from the existing public MP4 headers using HTTP range requests. Sizes and content identities were read from the Hub repository inventory.

Result

PASS — zero structural validation errors

Check	Result
Active indexed rows	467
Canonical Standard rows	338
Pre-Standard rows	129
Metadata columns per index	29
Unique persistent `record_id` values	467
Unique nonblank content hashes	467
Complete encoded-video metadata	467/467
Canonical repository paths matched	338/338
Pre-Standard repository paths matched	129/129
Stored-orientation conflicts	0
Duplicate active content hashes	0

Audited statistics

Total indexed playback duration: 50.06 hours
Canonical playback duration: 40.46 hours
Pre-Standard playback duration: 9.60 hours
Median active-record playback duration: 345.722 seconds
Total indexed video size: 1.885 TB decimal
Stored orientation: 455 portrait, 12 landscape
Audio streams: 462 present, 5 absent
Unknown finish dates: 9
Unknown finish times: 59

Outstanding warnings

Fifteen canonical 30×40 records use support = Paper, while Archive_Specifications.md describes the 30×40 support as Illustration Board. The curator must determine whether the rows or the specification are wrong; this release candidate does not manufacture a correction.
Five Pre-Standard records retain time = 00:00 while their finish date is unknown. Confirm whether those are documented midnight times or historical placeholders before normalizing them.
Two Pre-Standard records retain incomplete material fields because the filename evidence is insufficient or ambiguous.
Most masters retain an audio stream. Stream presence does not establish meaningful signal, and rights/privacy review remains necessary.
Encoded frame rate is playback rate and cannot be used as original drawing-time sampling.
The 2012–2016 layer has no public video payload at this snapshot.
Separate Hub configurations prevent tier mixing, but no leakage-safe train/validation/test partition has been defined.

Reproduction

Validate both active indexes:

python tools/validate_metadata.py metadata.csv \
  --pre-standard-metadata Pre_Standard_Time_Lapses/metadata.csv

For the strongest repository-inventory check, first augment the pinned Hub API JSON with the Xet file IDs returned by the same revision's resolve headers:

python tools/capture_hub_inventory.py \
  --repo-json repo_api_blobs.json \
  --revision 5bd5b715e59e2b5943ecac85b1b6c7de4d03184c \
  --output repo_inventory_xet.json

Then validate paths, Xet identities, and exact byte sizes together:

python tools/validate_metadata.py metadata.csv \
  --pre-standard-metadata Pre_Standard_Time_Lapses/metadata.csv \
  --repo-inventory-json repo_inventory_xet.json

A plain JSON list of repository paths is also accepted through the legacy --repo-files-json spelling, but that checks membership only; it cannot independently verify hashes or byte sizes.

Use --viewer-json only with a Viewer snapshot produced from the same repository revision and configuration under review.

The Pre-Standard technical enrichment is reproducible from a pinned Hub API response containing siblings with LFS metadata and an FFmpeg executable:

python tools/enrich_prestandard.py \
  --metadata Pre_Standard_Time_Lapses/metadata.csv \
  --repo-json repo_inventory_xet.json \
  --revision 5bd5b715e59e2b5943ecac85b1b6c7de4d03184c \
  --ffmpeg /path/to/ffmpeg \
  --cache prestandard_probe_cache.json \
  --output Pre_Standard_Time_Lapses/metadata.csv

The revision is intentionally explicit: reproducing against a moving branch would weaken both identity and technical-metadata claims.

The canonical v0.2 index remains reproducible from its pinned 335-row source plus the three audited additions:

python tools/repair_metadata.py source_metadata.csv metadata.csv \
  --additions tools/metadata_additions_v0.2.csv