docs/CHANGELOG.md

Changelog

v1.0 - 2026-07-14

Initial public release documentation for EventActivityNet.

Verified release facts:

• Large scale: 3,263 videos, 106.941600381 hours.
• Medium scale: 1,537 videos, 50.000000128 hours.
• Small scale: 667 videos, 20.000000374 hours.
• 200 verified action classes.
• Large train/validation split: 2,316 / 947.
• HDF5 schema: events, voxel_event_start, voxel_event_count.
• events shape: (T, 5, H, W), dtype int16.
• Total production size after validation: 4,355,745,895,245 bytes.
• Final integrity audit status: PASS.
• No truncated or structurally inconsistent production HDF5 files remain.

Notes:

• Five problematic HDF5 files were regenerated and safely installed before the final integrity audit.
• Medium and Small are deterministic nested v1.0 release scales derived from Large.
• The verified exact Large duration is 106.941600381 hours using src_fmt_dur.
• The verified class count is 200.

v1.0 final small-file update

• Added public ActivityNet Captions annotations filtered to the release videos.
• Added ActivityNet v1.3 action annotations filtered to the release videos.
• Added EventActivityNet derived caption/action alignment metadata.
• Added original-rate timing metadata for all 3,263 release videos.
• Added metadata/shard_checksums.sha256 with 219 repository-relative tar shard checksums.
• Updated payload summary metadata with 157 train shards, 62 validation shards, 219 total shards, 3,263 HDF5 members, and 4,355,753,021,440 remote tar bytes.