Google Veo 3.1 Fast Reference to Video API

Google Veo 3.1 Fast Reference-to-Video

Google Veo 3.1 Fast Reference-to-Video generates an 8-second video guided by up to three reference images and a text prompt. It is designed for subject, object, and product consistency, making it useful for character-led shots, product motion, style-guided generation, and other reference-driven video workflows.

Why Choose This?

• Reference-guided generation Use up to three reference images to preserve subject, object, or product identity in the generated video.

• Fast Veo workflow Built on Google Veo 3.1 Fast for quicker turnaround and efficient iteration.

• Consistent 8-second output Generates a fixed-length 8s MP4, making duration predictable for planning and pricing.

• Flexible aspect ratio Supports both 16:9 and 9:16 for landscape and vertical video use cases.

• Optional audio generation Enable generate_audio when you want the output to include generated sound.

• Simple pricing Pricing depends only on resolution and whether audio generation is enabled.

Parameters

How to Use

1. Upload your reference images — provide 1–3 images for subject, style, or product guidance.
2. Write your prompt — describe the motion, scene progression, camera movement, and overall visual intent.
3. Set aspect ratio — choose 16:9 for landscape or 9:16 for vertical output.
4. Choose resolution — use 720p for lower cost or 1080p for higher quality.
5. Enable audio (optional) — turn on generate_audio if you want generated sound in the result.
6. Add a negative prompt (optional) — describe elements or artifacts you want to avoid.
7. Set a seed (optional) — use a fixed seed for more reproducible outputs.
8. Submit — run the model and download the generated 8-second video.

Example Prompt

A cinematic product reveal of the same luxury watch from the reference images, rotating slowly on a reflective black surface, dramatic studio lighting, soft camera push-in, premium commercial style

Pricing

This model generates a fixed 8-second video.

Billing Rules

• Output length is fixed at 8 seconds
• 720p without audio costs $0.64
• 720p with audio costs $0.80
• 1080p without audio costs $0.80
• 1080p with audio costs $0.96
• Pricing depends only on resolution and generate_audio
• aspect_ratio, negative_prompt, seed, and the number of reference images do not affect pricing

Best Use Cases

• Product motion videos — Generate controlled product shots from reference images.
• Character consistency — Keep the same subject identity across a short generated clip.
• Style-guided generation — Use references to anchor visual style, mood, or composition.
• Marketing creatives — Produce short polished clips for ads, social media, and promotional assets.
• Vertical content — Generate 9:16 outputs for short-form mobile platforms.

Pro Tips

• Use clear, high-quality reference images for stronger identity preservation.
• Keep the reference images visually consistent when you want the subject or product to remain stable.
• Be specific in your prompt about motion, camera movement, and scene intent.
• Use negative_prompt to reduce unwanted style drift or artifacts.
• Enable audio only when you actually need it, since it changes pricing.
• Reuse the same seed when you want more reproducible generations.

Notes

• Both prompt and images are required.
• This workflow supports up to 3 reference images.
• The model uses the official Veo 3.1 Fast long-running generation flow with referenceImages added to the request payload.
• Output duration is fixed at 8 seconds.
• generate_audio defaults to false.

Related Models

• Other Google Veo 3.1 Fast video generation variants may be useful when you need text-to-video or non-reference workflows.