# BFL Flux 3 Image to Video API

> Flux 3 is BFL's image-to-video AI model. Bring static images to life with fluid animation, consistent character motion, and professional-grade video output.

Source: https://www.sandbase.ai/models/bfl/flux-3/image-to-video
API reference: https://www.sandbase.ai/models/bfl/flux-3/image-to-video/docs

## Facts

- Provider: BFL
- Type: Video model
- Model ID: `bfl/flux-3/image-to-video`
- Price: From $0.85 per run
- 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": "bfl/flux-3/image-to-video",
  "image": "https://storage.googleapis.com/falserverless/example_inputs/veo31_i2v_input.jpg",
  "prompt": "A red panda walks along a mossy log in a sunlit forest, one continuous unbroken shot. Ambient birdsong and rustling leaves.",
  "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 BFL Flux 3 Image to Video through SandBase?

Create a SandBase API key, then send requests with the model ID "bfl/flux-3/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 BFL account?

No. One SandBase API key and balance gives you access to BFL Flux 3 Image to Video and the other models in the catalog; you do not need to sign up with BFL separately.

## README

### Flux 3 Image to Video

FLUX 3 image-to-video: 5–20 second clips with optional native audio at 720p or 1080p.

#### Fields

| Field | Type | Default | Notes |
|---|---|---|---|
| `prompt` | string, required | — | Text instruction. |
| `image` | image URL, required | — | First frame. JPEG, PNG, or WebP URL. |
| `resolution` | `720p` / `1080p` | `720p` | Sets the per-second rate. |
| `duration` | 5–20 | 5 | Output length in seconds. |
| `generate_audio` | boolean | true | Native audio. Same price on or off. |
| `aspect_ratio` | `21:9` / `2:1` / `16:9` / `4:3` / `1:1` / `3:4` / `9:16` | — | Output frame shape. |

#### Billing

You pay for output seconds: $0.17 at 720p and $0.29 at 1080p.

| Output | 720p | 1080p |
|---|---|---|
| 5s (default) | $0.85 | $1.45 |
| 10s | $1.70 | $2.90 |
| 20s | $3.40 | $5.80 |

Failed runs are not charged.

#### Prompting

- Describe subject, action, camera, and sound.

#### Limits

- Clips are 5–20 seconds.

#### Also on SandBase

Other FLUX 3 endpoints: `bfl/flux-3/text-to-image`, `bfl/flux-3/edit`, `bfl/flux-3/text-to-video`.