SeedanceSAFE

inference.sh Agent skills for using our API to give your agents access to hundreds of apps and other agents

The instruction file, verbatim from the audited commit — this is the text the model reads, and the surface the audit's instruction layer examines. Quoted here so you can judge it without cloning anything.

---
name: seedance
description: "Generate videos with ByteDance Seedance 2.0 via inference.sh CLI. Unified model for text-to-video, image-to-video, and reference-to-video with synchronized audio, up to 1080p, 4-15s duration. Pro and Fast variants. Studio variants with private asset library for portrait consistency. Use for: social media videos, music videos, product demos, animated content, AI video with sound. Triggers: seedance, seedance 2, bytedance video, seedance t2v, seedance i2v, seedance r2v, video with audio, seedance 2.0, bytedance seedance, seedance studio"
allowed-tools: Bash(belt *)
---

> **Install the belt CLI skill:** `npx skills add belt-sh/cli`

# Seedance 2.0 Video Generation

Generate videos with synchronized audio using ByteDance's Seedance 2.0 via [inference.sh](https://inference.sh) CLI.

## Quick Start

> Requires inference.sh CLI (`belt`). [Install instructions](https://raw.githubusercontent.com/inference-sh/skills/refs/heads/main/cli-install.md)

```bash
belt login

belt app run bytedance/seedance-2-0 --input '{
  "prompt": "a jazz band performing in a dimly lit club",
  "generate_audio": true
}'
```


## Models

| Model | App ID | Best For |
|-------|--------|----------|
| Seedance 2.0 | `bytedance/seedance-2-0` | Best quality, up to 1080p |
| Seedance 2.0 Fast | `bytedance/seedance-2-0-fast` | Faster generation, up to 720p |
| Seedance 2.0 Studio | `bytedance/seedance-2-0-studio` | Quality + private asset library for portrait consistency |
| Seedance 2.0 Studio Fast | `bytedance/seedance-2-0-studio-fast` | Fast + private asset library for portrait consistency |

All models support text-to-video, image-to-video, multimodal reference-to-video, and synchronized audio generation. Studio variants automatically upload reference images to the BytePlus private virtual portrait library for enhanced character consistency - particularly useful for faces and branded characters.

## Modes

The model determines the generation mode from your inputs. These modes are **mutually exclusive** - use either first-frame/last-frame OR reference inputs, not both.

| Mode | Inputs | Description |
|------|--------|-------------|
| Text-to-Video | `prompt` only | Generate video from text description |
| Image-to-Video | `prompt` + `image` | Animate a still image (first frame) |
| First+Last Frame | `prompt` + `image` + `end_image` | Control start and end frames |
| Multimodal Reference | `prompt` + `reference_images`/`reference_videos`/`reference_audios` | Guide generation with reference material |

## Examples

### Text-to-Video with Audio

```bash
belt app run bytedance/seedance-2-0 --input '{
  "prompt": "ocean waves crashing on rocks during a storm, dramatic cinematic shot",
  "generate_audio": true,
  "duration": 10,
  "ratio": "16:9"
}'
```

### Fast Mode (Cheaper)

```bash
belt app run bytedance/seedance-2-0-fast --input '{
  "prompt": "a butterfly landing on a flower in slow motion",
  "generate_audio": true
}'
```

### Image-to-Video

Animate a still image into a video:

```bash
belt app run bytedance/seedance-2-0 --input '{
  "image": "https://your-image.jpg",
  "prompt": "gentle camera movement, leaves rustling in the wind",
  "generate_audio": true
}'
```

### Image-to-Video with Start and End Frames

```bash
belt app run bytedance/seedance-2-0 --input '{
  "image": "https://start-frame.jpg",
  "end_image": "https://end-frame.jpg",
  "prompt": "smooth transition between scenes",
  "generate_audio": true
}'
```

### Multi-Image Reference

Use multiple reference images to guide character appearance, outfits, and scene elements:

```bash
belt app run bytedance/seedance-2-0 --input '{
  "prompt": "The girl from Image 1 wearing the outfit from Image 2 walks through the cafe from Image 3",
  "reference_images": [
    "https://character-portrait.jpg",
    "https://outfit-reference.jpg",
    "https://cafe-scene.jpg"
  ],
  "generate_audio": true,
  "duration": 8
}'
```

### Video Editing (Replace Elements)

```bash
belt app run bytedance/seedance-2-0 --input '{
  "prompt": "Replace the perfume in Video 1 with the face cream from Image 1, preserving all original motions and camera work",
  "reference_images": ["https://face-cream.jpg"],
  "reference_videos": ["https://original-video.mp4"],
  "generate_audio": true
}'
```

### Video Extension (Stitch Clips)

```bash
belt app run bytedance/seedance-2-0 --input '{
  "prompt": "Video 1 transitions smoothly into Video 2, then the camera enters the painting from Video 3",
  "reference_videos": [
    "https://clip1.mp4",
    "https://clip2.mp4",
    "https://clip3.mp4"
  ],
  "generate_audio": true,
  "duration": 8
}'
```

### Reference with Audio

```bash
belt app run bytedance/seedance-2-0 --input '{
  "prompt": "The musician from Image 1 performs the song from Audio 1, voice style referenced from Audio 1",
  "reference_images": ["https://musician.jpg"],
  "reference_audios": ["https://music.mp3"],
  "generate_audio": true
}'
```

### Studio Mode (Portrait Consistency)

Studio variants upload images to BytePlus's private asset library for enhanced face/character consistency:

```bash
belt app run bytedance/seedance-2-0-studio --input '{
  "prompt": "The person in Image 1 smiles at the camera, golden hour lighting, cinematic",
  "reference_images": ["https://portrait.jpg"],
  "safety_identifier": "user-abc123",
  "generate_audio": true
}'
```

### Product Ad with Multiple References

```bash
belt app run bytedance/seedance-2-0 --input '{
  "prompt": "First-person POV product ad. Opening frame is Image 1, hand picks up the product. Camera pushes into close-up showing details. Use the camera movement style from Video 1. Background music from Audio 1.",
  "reference_images": ["https://product-hero.jpg", "https://product-detail.jpg"],
  "reference_videos": ["https://camera-style.mp4"],
  "reference_audios": ["https://bgm.mp3"],
  "generate_audio": true,
  "ratio": "9:16",
  "duration": 11
}'
```

## Prompt Guide

Reference assets in your prompt

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