# ByteDance Seedance 2.0 Fast Image to Video API

> ByteDance's most advanced image-to-video model in its fast tier delivering lower latency and cost without compromising on cinematic output, native audio, multi-shot editing, and director-level camera control for professional-grade video creation.

Source: https://www.sandbase.ai/models/bytedance/seedance/2.0/fast/image-to-video
API reference: https://www.sandbase.ai/models/bytedance/seedance/2.0/fast/image-to-video/docs

## Facts

- Provider: ByteDance
- Type: Video model
- Model ID: `bytedance/seedance/2.0/fast/image-to-video`
- Price: From $0.85 per run (15% off list price)
- Capabilities: image to video
- Billing: pay per use from one SandBase balance; no provider account or subscription needed

## Call it

- Unified Run API: `POST https://api.sandbase.ai/v1/run`

```bash
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "bytedance/seedance/2.0/fast/image-to-video",
  "image": "https://p9-arcosite.byteimg.com/tos-cn-i-goo7wpa0wc/f8fc1008f23a4908b7c897e8b7eb87df~tplv-goo7wpa0wc-image.image",
  "prompt": "Create a 360-degree orbiting camera shot based on this photo.",
  "duration": 5,
  "resolution": "720p",
  "generate_audio": true
}'
```

The response returns a run id; poll `GET https://api.sandbase.ai/v1/run/{id}` until the status is `completed` or `failed`.

## FAQ

### How do I call ByteDance Seedance 2.0 Fast Image to Video through SandBase?

Create a SandBase API key, then send requests with the model ID "bytedance/seedance/2.0/fast/image-to-video" to Unified Run API (/v1/run) at https://api.sandbase.ai. The request examples on this page show the exact payload.

### Do I need a separate ByteDance account?

No. One SandBase API key and balance gives you access to ByteDance Seedance 2.0 Fast Image to Video and the other models in the catalog; you do not need to sign up with ByteDance separately.

## README

### Seedance 2.0 Fast Image to Video

Seedance 2.0 Fast image-to-video: `image` becomes the first frame and the prompt directs motion, camera, and sound. Add `end_image` to set the final frame.

#### Fields

| Field | Type | Default | Notes |
|---|---|---|---|
| `prompt` | string, required | — | Up to 50,000 characters. |
| `image` | image URL, required | — | First frame. JPEG, PNG, or WebP URL. |
| `end_image` | image URL | — | Optional last frame. |
| `duration` | `auto` / 4 / 5 / 6 / 7 / 8 / 9 / 10 / 11 / 12 / 13 / 14 / 15 | 5 | Output length in seconds (4–15), or `auto` to let the model choose. |
| `aspect_ratio` | `16:9` / `9:16` / `1:1` / `4:3` / `3:4` | — | Output frame shape. |
| `resolution` | `480p` / `720p` | `720p` | Sets the per-second rate. |
| `generate_audio` | boolean | true | Native dialogue, music, and effects. Same price on or off. |
| `seed` | integer -1–4294967295 | random | Fix it to compare prompt changes; `-1` is random. |

#### Billing

You pay for output seconds: $0.10 at 480p, $0.20 at 720p. Audio is included. With `duration: "auto"` the quote assumes 15 seconds and the final charge uses the generated length.

| Output | 480p | 720p |
|---|---|---|
| 4s | $0.40 | $0.80 |
| 5s (default) | $0.50 | $1.00 |
| 10s | $1.00 | $2.00 |
| 15s | $1.50 | $3.00 |

Failed runs are not charged.

#### Prompting

- Describe what moves and how the camera behaves, not what is already visible.
- With two frames, describe the transition between them.

#### Limits

- Clips are 4–15 seconds.

#### Also on SandBase

Other Seedance 2.0 Fast endpoints and tiers: `bytedance/seedance/2.0/fast/text-to-video`, `bytedance/seedance/2.0/fast/reference-to-video`, `bytedance/seedance/2.5/image-to-video`, `bytedance/seedance/2.0/image-to-video`, `bytedance/seedance/2.0/mini/image-to-video`.