Media Gen

Documents

media-gen

Media Gen is an Agent Skill for documents published in the majiayu000/claude-skill-registry repository on GitHub: a SKILL.md instruction file an AI agent can load to do this task.

Generate images and videos using Google GenAI models. Use when user asks to "generate image with Gemini/Nano Banana", "create video with Veo", "make an image using Imagen", or requests media generation with specific models like gemini-2.5-flash-image, gemini-3.0-pro-image, imagen-3.0, veo-3.1, or veo-3.0.

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How to use this skill

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Inspect the Agent Skill at https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/data/media-gen/SKILL.md and all supporting files. Report provenance, permissions, scripts, dependencies, and security risks. Propose an exact installation into .agents/skills/media-gen, but wait for my approval before writing files or running scripts.

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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.