video-generation

SKILL.md

Video Generation Skill

Overview

This skill generates high-quality videos using structured prompts and a Python script. The workflow includes creating JSON-formatted prompts and executing video generation with optional reference image.

Core Capabilities

Create structured JSON prompts for AIGC video generation

Support reference image as guidance or the first/last frame of the video

Generate videos through automated Python script execution

Workflow

Step 1: Understand Requirements

When a user requests video generation, identify:

Subject/content: What should be in the image

Style preferences: Art style, mood, color palette

Technical specs: Aspect ratio, composition, lighting

Reference image: Any image to guide generation

You don't need to check the folder under /mnt/user-data

Step 2: Create Structured Prompt

Generate a structured JSON file in /mnt/user-data/workspace/ with naming pattern: {descriptive-name}.json

Step 3: Create Reference Image (Optional when image-generation skill is available)

Generate reference image for the video generation.

If only 1 image is provided, use it as the guided frame of the video

Step 3: Execute Generation

Call the Python script:

python /mnt/skills/public/video-generation/scripts/generate.py \
  --prompt-file /mnt/user-data/workspace/prompt-file.json \
  --reference-images /path/to/ref1.jpg \
  --output-file /mnt/user-data/outputs/generated-video.mp4 \
  --aspect-ratio 16:9

Parameters:

--prompt-file: Absolute path to JSON prompt file (required)

--reference-images: Absolute paths to reference image (optional)

--output-file: Absolute path to output image file (required)

--aspect-ratio: Aspect ratio of the generated image (optional, default: 16:9)

[!NOTE]
Do NOT read the python file, instead just call it with the parameters.

Video Generation Example

User request: "Generate a short video clip depicting the opening scene from "The Chronicles of Narnia: The Lion, the Witch and the Wardrobe"

Step 1: Search for the opening scene of "The Chronicles of Narnia: The Lion, the Witch and the Wardrobe" online

Step 2: Create a JSON prompt file with the following content:

{
  "title": "The Chronicles of Narnia - Train Station Farewell",
  "background": {
    "description": "World War II evacuation scene at a crowded London train station. Steam and smoke fill the air as children are being sent to the countryside to escape the Blitz.",
    "era": "1940s wartime Britain",
    "location": "London railway station platform"
  },
  "characters": ["Mrs. Pevensie", "Lucy Pevensie"],
  "camera": {
    "type": "Close-up two-shot",
    "movement": "Static with subtle handheld movement",
    "angle": "Profile view, intimate framing",
    "focus": "Both faces in focus, background soft bokeh"
  },
  "dialogue": [
    {
      "character": "Mrs. Pevensie",
      "text": "You must be brave for me, darling. I'll come for you... I promise."
    },
    {
      "character": "Lucy Pevensie",
      "text": "I will be, mother. I promise."
    }
  ],
  "audio": [
    {
      "type": "Train whistle blows (signaling departure)",
      "volume": 1
    },
    {
      "type": "Strings swell emotionally, then fade",
      "volume": 0.5
    },
    {
      "type": "Ambient sound of the train station",
      "volume": 0.5
    }
  ]
}

Step 3: Use the image-generation skill to generate the reference image

Load the image-generation skill and generate a single reference image narnia-farewell-scene-01.jpg according to the skill.

Step 4: Use the generate.py script to generate the video

python /mnt/skills/public/video-generation/scripts/generate.py \
  --prompt-file /mnt/user-data/workspace/narnia-farewell-scene.json \
  --reference-images /mnt/user-data/outputs/narnia-farewell-scene-01.jpg \
  --output-file /mnt/user-data/outputs/narnia-farewell-scene-01.mp4 \
  --aspect-ratio 16:9

Do NOT read the python file, just call it with the parameters.

Output Handling

After generation:

Videos are typically saved in /mnt/user-data/outputs/

Share generated videos (come first) with user as well as generated image if applicable, using present_files tool

Provide brief description of the generation result

Offer to iterate if adjustments needed

Notes

Always use English for prompts regardless of user's language

JSON format ensures structured, parsable prompts

Reference image enhance generation quality significantly

Iterative refinement is normal for optimal results

Providers (Gemini / MiniMax)

Auto-selected by environment variables (CLI unchanged):

GEMINI_API_KEY set → Gemini Veo (default, unchanged).

Only MINIMAX_API_KEY set → MiniMax video (/v1/video_generation, async 3-step poll/download).

Force with VIDEO_GENERATION_PROVIDER=gemini|minimax.

MiniMax overrides: MINIMAX_API_HOST (default https://api.minimaxi.com),
MINIMAX_VIDEO_MODEL (default MiniMax-Hailuo-2.3). The first reference image is used
as MiniMax first_frame_image. MiniMax ignores --aspect-ratio (it uses resolution/duration).
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