$27

Animate it

belt app run falai/wan-2-5-i2v --input '{

"prompt": "gentle ripples on the lake surface, clouds slowly drifting, warm light shifting, birds flying in the distance",

"image": "path/to/lake-image.png"

}'

## Model Selection

| Model | App ID | Best For | Motion Style |

|-------|--------|----------|-------------|

| **Wan 2.5 i2v** | `falai/wan-2-5-i2v` | Realistic motion, natural movement | Photorealistic, subtle |

| **WAN-I2V (Pruna)** | `pruna/wan-i2v` | Economical, fast, 480p/720p | Natural, efficient |

| **Seedance 2.0** | `bytedance/seedance-2-0` | Up to 1080p, sync audio, all input types | Versatile, high quality |

| **Seedance 2.0 Fast** | `bytedance/seedance-2-0-fast` | Fast variant, same capabilities | Versatile, fast |

| **Fabric 1.0** | `falai/fabric-1-0` | Cloth, fabric, liquid, flowing materials | Physics-based flow |

| **Grok Imagine Video** | `xai/grok-imagine-video` | General animation, text-guided | Versatile |

### When to Use Each

| Scenario | Best Model | Why |

|----------|-----------|-----|

| Landscape with water/clouds | **Wan 2.5 i2v** | Best at natural, realistic motion |

| Portrait with subtle expression | **Wan 2.5 i2v** | Maintains face fidelity |

| Product with fabric/cloth | **Fabric 1.0** | Specialized in material physics |

| Flag waving, curtain flowing | **Fabric 1.0** | Cloth simulation |

| Illustrated/artistic image | **Seedance 2.0** | Matches stylized content |

| General "bring to life" | **Seedance 2.0** | Good all-rounder, up to 1080p |

| Quick test/iteration | **Seedance 2.0 Fast** | Faster generation |

## Motion Types

### Camera Movement

| Movement | Prompt Keyword | Effect |

|----------|---------------|--------|

| Push in / Dolly forward | "slow dolly forward", "camera pushes in" | Increasing intimacy/focus |

| Pull out / Dolly back | "camera pulls back", "slow zoom out" | Reveal, context |

| Pan left/right | "camera pans slowly to the right" | Scanning, following |

| Tilt up/down | "camera tilts upward" | Revealing height |

| Orbit | "camera orbits around the subject" | 3D exploration |

| Crane up | "camera rises upward" | Grand reveal |

| Static | (no camera movement prompt) | Subject motion only |

### Subject Motion

| Type | Prompt Examples |

|------|----------------|

| Natural elements | "water rippling", "clouds drifting", "leaves rustling in breeze" |

| Hair/clothing | "hair blowing gently in wind", "dress fabric flowing" |

| Atmospheric | "fog slowly rolling", "dust particles floating in light beams" |

| Character | "person slowly turns to camera", "subtle breathing motion" |

| Mechanical | "gears turning", "clock hands moving" |

| Liquid | "coffee steam rising", "paint dripping", "water pouring" |

## Prompting Best Practices

### The Golden Rule: Subtle > Dramatic

AI video models produce better results with **gentle, subtle motion** than dramatic action. Requesting too much movement causes distortion and artifacts.

❌ "person running and jumping over obstacles while the camera spins"

✅ "person slowly walking forward, gentle breeze, camera follows alongside"

❌ "explosion with debris flying everywhere"

✅ "candle flame flickering gently, warm ambient light shifting"

❌ "fast zoom into the eyes with dramatic camera shake"

✅ "slow dolly forward toward the subject, subtle focus shift"

### Prompt Structure

[Camera movement] + [Subject motion] + [Atmospheric effects] + [Mood/pace]

### Examples by Scenario

Landscape animation

belt app run falai/wan-2-5-i2v --input '{

"prompt": "gentle camera pan right, water reflecting moving clouds, trees swaying slightly in breeze, warm golden light, peaceful and slow",

"image": "landscape.png"

}'

Portrait animation

belt app run falai/wan-2-5-i2v --input '{

"prompt": "subtle breathing motion, slight head turn, natural eye blink, hair moving gently, soft ambient lighting shifts",

"image": "portrait.png"

}'

Product shot animation

belt app run bytedance/seedance-2-0 --input '{

"prompt": "slow 360 degree orbit around the product, gentle spotlight movement, subtle reflections shifting, premium product showcase, smooth motion",

"image": "product.png",

"generate_audio": true

}'

Fabric/cloth animation

belt app run falai/fabric-1-0 --input '{

"prompt": "fabric flowing and rippling in gentle wind, natural cloth physics, soft movement",

"image": "fabric-scene.png"

}'

Architectural visualization

belt app run falai/wan-2-5-i2v --input '{

"prompt": "slow dolly forward through the entrance, slight camera tilt upward, ambient light filtering through windows, dust particles in light beams",

"image": "building-interior.png"

}'

## Duration Guidelines

Duration
Quality
Use For

2-3 seconds
Highest quality
GIFs, looping backgrounds, cinemagraphs

4-5 seconds
High quality
Social media posts, product reveals

6-8 seconds
Good quality
Short clips, transitions

10+ seconds
Quality degrades
Avoid unless stitching shorter clips

### Extending Duration

For longer videos, generate multiple short clips and stitch:

Generate 3 clips from the same image with progressive motion

belt app run falai/wan-2-5-i2v --input '{

"prompt": "slow pan left, gentle water motion",

"image": "scene.png"

}' --no-wait

belt app run falai/wan-2-5-i2v --input '{

"prompt": "continuing pan, clouds shifting, light changing",

"image": "scene.png"

}' --no-wait

Stitch together

belt app run infsh/media-merger --input '{

"media": ["clip1.mp4", "clip2.mp4"]

}'

## The Full Workflow

### Still-to-Final-Video Pipeline

1. Generate source image (best quality)

belt app run bytedance/seedream-4-5 --input '{

"prompt": "cinematic landscape, misty mountains at dawn, lake in foreground, dramatic clouds, golden hour, 4K quality, professional photography",

"size": "2K"

}'

2. Animate the image

belt app run falai/wan-2-5-i2v --input '{

"prompt": "gentle mist rolling through the valley, lake surface rippling, clouds slowly moving, birds in distance, warm light shifting",

"image": "landscape.png"

}'

3. Upscale video if needed

belt app run falai/topaz-video-upscaler --input '{

"video": "animated-landscape.mp4"

}'

4. Add ambient audio

belt app run infsh/hunyuanvideo-foley --input '{

"video": "animated-landscape.mp4",

"prompt": "gentle nature ambience, distant birds, soft wind, water lapping"

}'

5. Merge video with audio

belt app run infsh/video-audio-merger --input '{

"video": "upscaled-landscape.mp4",

"audio": "ambient-audio.mp3"

}'

## Cinemagraph Effect

A cinemagraph is a still photo where only one element moves (e.g., waterfall moving in an otherwise frozen scene). To achieve this:

- Generate the still image with the motion element clearly defined

- Prompt for motion only in that specific element

- Keep to 2-4 seconds for seamless looping

belt app run falai/wan-2-5-i2v --input '{

"prompt": "only the waterfall is moving, everything else remains perfectly still, water cascading smoothly, rest of scene frozen",

"image": "waterfall-scene.png"

}'

## Common Mistakes

Mistake
Problem
Fix

Too much motion requested
Distortion, artifacts, warping
Subtle > dramatic, always

Wrong model for content type
Poor results
Use selection guide above

Clips too long (10s+)
Quality degrades significantly
Keep to 3-5 seconds, stitch if needed

No camera movement specified
Random/unpredictable motion
Always specify camera behavior

Conflicting motion directions
Chaotic, unnatural
One primary motion direction

Low-res source image
Low-res video output
Start with highest quality source

Complex action scenes
Models can't handle
Keep motion simple and natural

## Related Skills

npx skills add inference-sh/skills@ai-video-generation

npx skills add inference-sh/skills@ai-image-generation

npx skills add inference-sh/skills@p-video

npx skills add inference-sh/skills@video-prompting-guide

npx skills add inference-sh/skills@prompt-engineering