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google-video (Google Video)
This example demonstrates Google Veo video generation models for AI-powered video creation from text prompts.
You can run this example with:
npx promptfoo@latest init --example google-video
cd google-video
Prerequisites
Choose one:
- Google AI Studio / Gemini API key
- Google Cloud project with Vertex AI API enabled and authentication via
gcloud auth application-default login
Setup
# Option 1: Google AI Studio / Gemini API
export GOOGLE_API_KEY=your-api-key
# Option 2: Vertex AI
gcloud services enable aiplatform.googleapis.com
gcloud auth application-default login
export GOOGLE_PROJECT_ID=your-project-id
Environment Variables
GOOGLE_API_KEY- Google AI Studio / Gemini API keyGOOGLE_PROJECT_ID- Google Cloud project ID for Vertex AI
Available Models
| Model | Description | Duration |
|---|---|---|
veo-3.1-generate-preview |
Latest with video extension support | 4, 6, 8s |
veo-3.1-fast-preview |
Fast Veo 3.1 | 4, 6, 8s |
veo-3-generate |
Veo 3.0 standard | 4, 6, 8s |
veo-3-fast |
Veo 3.0 fast | 4, 6, 8s |
veo-2-generate |
Veo 2.0 | 5, 6, 8s |
Running the Example
npx promptfoo@latest eval
Configuration Options
| Option | Type | Description |
|---|---|---|
aspectRatio |
string | 16:9 (default) or 9:16 |
resolution |
string | 720p (default) or 1080p |
durationSeconds |
number | Duration: 4, 6, 8 for Veo 3.x; 5, 6, 8 for Veo 2 |
personGeneration |
string | allow_adult or dont_allow |
negativePrompt |
string | Concepts to avoid |
image |
string | Source image for image-to-video |
lastImage |
string | End frame for interpolation |
extendVideoId |
string | Operation ID from previous Vertex Veo generation (Veo 3.1 only) |
referenceImages |
array | Up to 3 style reference images (file paths or objects) |
Features
Text-to-Video
Generate videos from text prompts (see promptfooconfig.yaml).
Image-to-Video
Generate videos from a starting image (see promptfooconfig-image.yaml).
Video Extension (Veo 3.1)
Extend previously generated Veo videos using the explicit Vertex provider path and an operation ID (see promptfooconfig-extension.yaml).
Notes
- Generated videos are stored in promptfoo's blob storage system
- Videos use content-addressable hashing for automatic deduplication
- Use
--no-cacheflag to force regeneration - Videos are served via the local server for viewing in the UI
- Veo models use long-running operations with polling for completion
google:video:*uses Google AI Studio by default and auto-detects Vertex AI when project-based auth is configured- Existing project-based
google:video:*configs remain compatible, butvertex:video:*is the recommended explicit path for Vertex-only flows such asextendVideoId