docs/RELEASE_NOTES.md

EventActivityNet v1.0 Release Notes

Release Status

EventActivityNet v1.0 provides complete 5-bin and 9-bin generated event voxel representations over the same canonical 3,263-video set.

Representation Summary

Representation	Path	Train / validation	Shards	Canonical HDF5 bytes
5-bin	data_5bin/	2,316 / 947	219	4,355,745,895,245
9-bin	data_9bin/	2,316 / 947	219	4,214,122,096,103

Both use 157 train and 62 validation tar shards. The repository contains approximately 8.57 TB of payload overall. The variants are alternative temporal groupings; neither is claimed to be inherently superior.

2026-08 Update

• Added the complete 9-bin representation.
• Normalized public representation directories to data_5bin/ and data_9bin/.
• Retained the same canonical 3,263-video train/validation membership and shared annotations for both variants.
• Separated shard manifests, summaries, and checksums under metadata/5bin/ and metadata/9bin/.
• Generalized source timing metadata to describe both representations without changing canonical source values.

Integrity

Final audits confirmed:

• 3,263 valid HDF5 files per representation;
• zero unreadable or structurally invalid production files;
• exact events, voxel_event_start, and voxel_event_count datasets;
• num_bins=5 or num_bins=9 matching each representation;
• 438 expected remote tar shards with exact recorded sizes and checksums;
• no tar payload under the former data/ namespace.

Scale Summary

Scale	Videos	Hours	Train	Validation	Classes	Event-friendly
Large	3,263	106.94	2,316	947	200	65.31%
Medium	1,537	50.00	1,074	463	200	64.80%
Small	667	20.00	473	194	200	64.62%

Caveats

• These are generated event voxel tensors, not native event-camera recordings.
• The verified release contains 200 action classes.
• The historical 107.3-hour Large figure is approximate; the verified duration is 106.94 hours.
• Medium and Small are deterministic nested v1.0 scales.
• Source FPS varies by video and timing uses released rational FPS metadata.

Changing the original 5-bin directory from data/ to data_5bin/ changes repository URLs used by older download scripts. Tar filenames and content checksums are unchanged.