Write the Start And End Frame AI Video endpoint contract

Define why the closing frame matters to the edit: product reveal, scene resolution, match cut, or final reveal. Then state which opening details cannot be traded away. 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. For the working record, preserve the source ledger, and ask the production lead to record failure conditions before the release review.

Inspect the path, not only the two supplied images

Run the same pair of frames with a short, medium, and deliberately simplified motion brief; compare continuity burden and editorial usefulness, not showcase polish. 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. For the working record, preserve the authorization record, and ask the delivery owner to record human approval before the source comparison.

• Opening-state fidelity During review, preserve the evidence table, and ask the rights reviewer to record format readiness before the workflow transfer.
• Causal intermediate motion During review, preserve the rights memo, and ask the accessibility reviewer to record evidence freshness before the workflow transfer.
• Closing-state and edit usability During review, preserve the authorization record, and ask the delivery owner to record source fidelity before the acceptance review.

Separate capability, availability, and entitlement

A result fails when it reaches the final image but loses product shape, identity, lighting direction, brand detail, or the intended causal action along the way. 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. During review, preserve the reference set, and ask the accessibility reviewer to record camera logic before the acceptance review.

Keep the Start And End Frame AI Video 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. At this stage, preserve the test fixture, and ask the creative lead to record source fidelity before the bounded test.

• Google DeepMind lists first and last frame among the documented creative controls for Veo 3.1. At this stage, preserve the decision history, and ask the policy reviewer to record claim scope before the bounded test.