# Vidu Start-End to Video

> Vidu Start-End to Video generates smooth transition videos between specified start and end images.


## Overview

- **Endpoint**: `https://fal.run/fal-ai/vidu/start-end-to-video`
- **Model ID**: `fal-ai/vidu/start-end-to-video`
- **Category**: image-to-video
- **Kind**: inference
**Tags**: motion, transition



## Pricing

For **4s video** your request will cost **$0.20**.

For more details, see [fal.ai pricing](https://fal.ai/pricing).

## API Information

This model can be used via our HTTP API or more conveniently via our client libraries.
See the input and output schema below, as well as the usage examples.


### Input Schema

The API accepts the following input parameters:


- **`prompt`** (`string`, _required_):
  Text prompt for video generation, max 1500 characters
  - Examples: "Transform the car frame into a complete vehicle."

- **`start_image_url`** (`string`, _required_):
  URL of the image to use as the first frame
  - Examples: "https://storage.googleapis.com/falserverless/web-examples/vidu/2-carchasis.png"

- **`end_image_url`** (`string`, _required_):
  URL of the image to use as the last frame
  - Examples: "https://storage.googleapis.com/falserverless/web-examples/vidu/2-carbody.png"

- **`seed`** (`integer`, _optional_):
  Random seed for generation

- **`movement_amplitude`** (`MovementAmplitudeEnum`, _optional_):
  The movement amplitude of objects in the frame Default value: `"auto"`
  - Default: `"auto"`
  - Options: `"auto"`, `"small"`, `"medium"`, `"large"`



**Required Parameters Example**:

```json
{
  "prompt": "Transform the car frame into a complete vehicle.",
  "start_image_url": "https://storage.googleapis.com/falserverless/web-examples/vidu/2-carchasis.png",
  "end_image_url": "https://storage.googleapis.com/falserverless/web-examples/vidu/2-carbody.png"
}
```

**Full Example**:

```json
{
  "prompt": "Transform the car frame into a complete vehicle.",
  "start_image_url": "https://storage.googleapis.com/falserverless/web-examples/vidu/2-carchasis.png",
  "end_image_url": "https://storage.googleapis.com/falserverless/web-examples/vidu/2-carbody.png",
  "movement_amplitude": "auto"
}
```


### Output Schema

The API returns the following output format:

- **`video`** (`File`, _required_):
  The generated transition video between start and end frames
  - Examples: {"url":"https://storage.googleapis.com/falserverless/web-examples/vidu/2-car.mp4"}



**Example Response**:

```json
{
  "video": {
    "url": "https://storage.googleapis.com/falserverless/web-examples/vidu/2-car.mp4"
  }
}
```


## Usage Examples

### cURL

```bash
curl --request POST \
  --url https://fal.run/fal-ai/vidu/start-end-to-video \
  --header "Authorization: Key $FAL_KEY" \
  --header "Content-Type: application/json" \
  --data '{
     "prompt": "Transform the car frame into a complete vehicle.",
     "start_image_url": "https://storage.googleapis.com/falserverless/web-examples/vidu/2-carchasis.png",
     "end_image_url": "https://storage.googleapis.com/falserverless/web-examples/vidu/2-carbody.png"
   }'
```

### Python

Ensure you have the Python client installed:

```bash
pip install fal-client
```

Then use the API client to make requests:

```python
import fal_client

def on_queue_update(update):
    if isinstance(update, fal_client.InProgress):
        for log in update.logs:
           print(log["message"])

result = fal_client.subscribe(
    "fal-ai/vidu/start-end-to-video",
    arguments={
        "prompt": "Transform the car frame into a complete vehicle.",
        "start_image_url": "https://storage.googleapis.com/falserverless/web-examples/vidu/2-carchasis.png",
        "end_image_url": "https://storage.googleapis.com/falserverless/web-examples/vidu/2-carbody.png"
    },
    with_logs=True,
    on_queue_update=on_queue_update,
)
print(result)
```

### JavaScript

Ensure you have the JavaScript client installed:

```bash
npm install --save @fal-ai/client
```

Then use the API client to make requests:

```javascript
import { fal } from "@fal-ai/client";

const result = await fal.subscribe("fal-ai/vidu/start-end-to-video", {
  input: {
    prompt: "Transform the car frame into a complete vehicle.",
    start_image_url: "https://storage.googleapis.com/falserverless/web-examples/vidu/2-carchasis.png",
    end_image_url: "https://storage.googleapis.com/falserverless/web-examples/vidu/2-carbody.png"
  },
  logs: true,
  onQueueUpdate: (update) => {
    if (update.status === "IN_PROGRESS") {
      update.logs.map((log) => log.message).forEach(console.log);
    }
  },
});
console.log(result.data);
console.log(result.requestId);
```


## Additional Resources

### Documentation

- [Model Playground](https://fal.ai/models/fal-ai/vidu/start-end-to-video)
- [API Documentation](https://fal.ai/models/fal-ai/vidu/start-end-to-video/api)
- [OpenAPI Schema](https://fal.ai/api/openapi/queue/openapi.json?endpoint_id=fal-ai/vidu/start-end-to-video)

### fal.ai Platform

- [Platform Documentation](https://docs.fal.ai)
- [Python Client](https://docs.fal.ai/clients/python)
- [JavaScript Client](https://docs.fal.ai/clients/javascript)