# delta

- **Event:** [Meta Global AI Developer Hackathon](https://cerebralvalley.ai/e/meta-ai-developer-hackathon)
- **When:** Oct 26, 12:00 PM – Nov 4, 9:00 PM (EST)
- **Where:** Online
- **Team:** [Shaheen Nazir](https://cerebralvalley.ai/u/shaheennazir)
- **GitHub:** https://github.com/Shaheennazir/delta
- **Demo video:** https://youtu.be/1TgThE8oWt8
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/4482

delta turns raw video into a searchable, auditable evidence base. Upload an MP4, ask a question in plain language, and delta returns an answer grounded in timestamped evidence — actual moments, frame IDs, speakers, on-screen text, and tracked entities from that specific video. Before answering, it verifies every claim against stored evidence, calibrates its confidence, and abstains when the footage doesn't support an answer instead of guessing. It's built on real Meta models (SAM 3.1, Muse Spark, Muse Voice Transcribe) with deterministic layers for tracking, temporal reasoning, OCR, audio events, and evidence gating — no mocks, no silent fallbacks. The result is video AI you can trust, inspect, and challenge.
Video is the largest and least searchable form of recorded knowledge. Reviewing footage is manual, slow, and expensive:
- A newsroom needs to verify what a clip shows before publishing.
- A compliance team needs to find the exact moment a policy was violated.
- A coach needs to know why a play broke down.
- A security team needs to search hours of footage for one event.
- A researcher needs to cite a specific moment, not "somewhere in this video."
General video AI makes this worse: it summarizes confidently, invents timestamps, mixes up people and objects, and gives no way to check its work. In high-stakes settings, an answer you can't verify is worse than no answer.
delta solves the trust problem, not just the search problem. Every factual claim is tied to evidence from the video, and unsupported claims are refused.

## More from Meta Global AI Developer Hackathon

- [Skrpt_Kpr404](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/4479)
- [sstmade](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/4480)
- [SpecCheck](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/4481)
- [theiatron](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/4483)
- [RepoFuse](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/4484)
- [Wander Travel](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/4485)

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