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Model grammar profile · 3.1

Google Veo 3.1
Cinematography + subject + action + context + ambience

Apply Google’s five-part formula: cinematography, subject, action, context, then style and ambiance. Append dialogue and audio only when the selected version supports them.

Recommended sentence order

01cinematography
02subject
03action
04context
05style
06dialogue
07audio

Negative prompt policy

Use exclusions the way this surface expects.

When the target surface exposes a negative field, normalize exclusions to concise concepts rather than ‘no’ or ‘don’t’ instructions.

Typed parameters

Duration4 · 6 · 8
Aspect ratio16:9 · 9:16
Resolution720p · 1080p
Generate audioOn / off

Reliability constraints

  • API capabilities vary by Veo version, region, and Vertex/Gemini surface.
  • Timestamp blocks are guidance rather than a guaranteed parser contract.
  • Responsible AI filtering can block prompts or source images.

Source material

Google DeepMind Veo prompt guide Google Cloud Veo guide

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