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