Use first and last frame ai to define visual invariants before generation.

Write the First And Last Frame AI endpoint contract

List what is identical in both frames before describing motion: person, wardrobe, prop count, location geometry, palette, and camera axis. Then name the one transformation the middle must explain. Inventory source rights for both images and mark any identity, product, text, or location detail that cannot change. Endpoint control is meaningful only when the transition has a defined editorial job and the two supplied states are compatible enough to review. Before revision, preserve the decision history, and ask the identity reviewer to record control availability before the production checkpoint.

Inspect the path, not only the two supplied images

Pair an opening seated pose with a final standing pose in the same room, keeping camera and lighting fixed; inspect balance, contact, and object continuity frame by frame. Review intermediate frames at a consistent cadence for geometry, identity, contact, lighting, camera axis, and causal order. A model can reproduce the beginning and ending while inventing an unusable bridge, so acceptance belongs to the whole shot rather than two thumbnails. Before revision, preserve the reference set, and ask the model evaluator to record evidence freshness before the release review.

• Opening-state fidelity Before revision, preserve the handoff draft, and ask the channel editor to record source fidelity before the workflow transfer.
• Causal intermediate motion Before revision, preserve the decision history, and ask the claims reviewer to record human approval before the rights check.
• Closing-state and edit usability Before revision, preserve the control log, and ask the model evaluator to record visible continuity before the workflow transfer.

Separate capability, availability, and entitlement

Reject a transition that changes identity, duplicates props, repositions architecture, or uses a cut-like discontinuity when the brief requires continuous action. Verify the exact vendor, model version, region, account surface, input constraints, and check date before relying on the feature. The documented Veo example proves a named control in that context; it does not prove current SEELE access or any free, downloadable, permanent, or open-ended use. Before revision, preserve the test fixture, and ask the identity reviewer to record format readiness before the rights check.

Keep the First And Last Frame AI evidence ledger narrow

Google DeepMind first-party documentation verifies a current first-and-last-frame control for Veo 3.1. Record the source owner, product or model name, verification date, surface or region, exact claim, and unresolved gap beside the test. Taxonomy eligibility and search demand explain why the page exists, but neither can be reused as proof that SEELE or another provider exposes the entire query as a current capability. For the working record, preserve the reference set, and ask the production lead to record revision intent before the production checkpoint.

• Google DeepMind lists first and last frame among the documented creative controls for Veo 3.1. For the working record, preserve the rights memo, and ask the production lead to record control availability before the editorial approval.