Media Generation
Generate images and videos using Google GenAI SDK (google-genai).
Model Selection
| Task | Model | Use Case |
|---|---|---|
| Image | gemini-2.5-flash-image (Nano Banana) | Fast, cheap ($0.039/img) |
| Image | gemini-3.0-pro-image (Nano Banana Pro) | High quality, 4K |
| Image | imagen-3.0-generate-002 | Imagen, negative prompts |
| Video | veo-3.1-generate-preview | Best quality, audio |
| Video | veo-3.1-fast-generate-preview | Faster generation |
Auto-selection logic:
- Image without special needs →
gemini-2.5-flash-image - Image needing 4K or high quality →
gemini-3.0-pro-image - Image with negative prompt →
imagen-3.0-generate-002 - Video →
veo-3.1-generate-preview
Environment
Requires GEMINI_API_KEY or GOOGLE_API_KEY environment variable.
fnox get gemini-api-key # or set GEMINI_API_KEY
Image Generation
scripts/gen_image.py "A sunset over mountains" output.png
scripts/gen_image.py "A cat portrait" cat.jpg --model gemini-3.0-pro-image --aspect-ratio 9:16
scripts/gen_image.py "Product photo" product.png --model imagen-3.0-generate-002 --negative-prompt "blurry"
Parameters:
--model: Model choice (default:gemini-2.5-flash-image)--aspect-ratio: 1:1, 16:9, 9:16, 4:3 (default: 1:1)--negative-prompt: What to avoid (Imagen only)
Video Generation
scripts/gen_video.py "A cat walking through grass" cat.mp4
scripts/gen_video.py "Timelapse of clouds" clouds.mp4 --model veo-3.1-fast-generate-preview
scripts/gen_video.py "Camera panning over city" city.mp4 --image reference.jpg
Parameters:
--model: Model choice (default:veo-3.1-generate-preview)--image: Input image for image-to-video--negative-prompt: What to avoid--poll-interval: Seconds between status checks (default: 10)
Video generation is async - script polls until complete.