# Vidu Q4

> Vidu Q4 turns a first-frame image into 3 to 16 second videos with native audio at up to 4K. Best for animating stills, product shots and character scenes with dialogue.


## Overview

- **Endpoint**: `https://fal.run/fal-ai/vidu/q4/image-to-video`
- **Model ID**: `fal-ai/vidu/q4/image-to-video`
- **Category**: image-to-video
- **Kind**: inference
**Description**: Vidu Q4 Image-to-Video animates a start frame into a high-fidelity clip while preserving the subject and composition of the source image. Prompts can direct motion, camera cuts, and spoken dialogue, and native audio adds synchronized speech and sound effects. It supports durations from 3 to 16 seconds and output from 540p up to 4K.

**Tags**: image-to-video, multi-shot, 4k



## Pricing

For every second of video you generate, you will be charged **$0.0315** at **540p**, **$0.0665** at **720p**, **$0.084** at **1080p**, **$0.133** at **2K** or **$0.273** at **4K**. For example, a **5s** video at **720p** (the default) will cost **$0.3325**.

Note: these are promotional rates, **30%** off until **November 30**, after which **540p** is **$0.045**/second, **720p** is **$0.095**/second, **1080p** is **$0.12**/second, **2K** is **$0.19**/second and **4K** is **$0.39**/second.

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`, _optional_):
  Text prompt for video generation, max 5000 characters Default value: `""`
  - Default: `""`
  - Examples: "The woman turns toward the camera and smiles, then the shot cuts to a close-up as she says: \"Let's go.\""

- **`image_url`** (`string`, _required_):
  URL or base64 data URI of the image to use as the first frame. Supports png, jpeg, jpg and webp up to 50 MB.
  - Examples: "https://storage.googleapis.com/falserverless/web-examples/vidu/stylish_woman.webp"

- **`duration`** (`integer`, _optional_):
  Duration of the video in seconds (3-16) Default value: `5`
  - Default: `5`
  - Range: `3` to `16`

- **`seed`** (`integer`, _optional_):
  Random seed for reproducibility. If None, a random seed is chosen.

- **`resolution`** (`ResolutionEnum`, _optional_):
  Output video resolution Default value: `"720p"`
  - Default: `"720p"`
  - Options: `"540p"`, `"720p"`, `"1080p"`, `"2K"`, `"4K"`



**Required Parameters Example**:

```json
{
  "image_url": "https://storage.googleapis.com/falserverless/web-examples/vidu/stylish_woman.webp"
}
```

**Full Example**:

```json
{
  "prompt": "The woman turns toward the camera and smiles, then the shot cuts to a close-up as she says: \"Let's go.\"",
  "image_url": "https://storage.googleapis.com/falserverless/web-examples/vidu/stylish_woman.webp",
  "duration": 5,
  "resolution": "720p"
}
```


### Output Schema

The API returns the following output format:

- **`video`** (`File`, _required_):
  The generated video from image using the Q4 model
  - Examples: {"url":"https://v3b.fal.media/files/b/0a8c9189/n9z3uUDPqmU2msAtqr25-_output.mp4"}

- **`cover_image`** (`Image`, _optional_):
  Cover image of the generated video

- **`seed`** (`integer`, _required_):
  The random seed used for generation



**Example Response**:

```json
{
  "video": {
    "url": "https://v3b.fal.media/files/b/0a8c9189/n9z3uUDPqmU2msAtqr25-_output.mp4"
  }
}
```


## Usage Examples

### cURL

```bash
curl --request POST \
  --url https://fal.run/fal-ai/vidu/q4/image-to-video \
  --header "Authorization: Key $FAL_KEY" \
  --header "Content-Type: application/json" \
  --data '{
     "image_url": "https://storage.googleapis.com/falserverless/web-examples/vidu/stylish_woman.webp"
   }'
```

### 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/q4/image-to-video",
    arguments={
        "image_url": "https://storage.googleapis.com/falserverless/web-examples/vidu/stylish_woman.webp"
    },
    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/q4/image-to-video", {
  input: {
    image_url: "https://storage.googleapis.com/falserverless/web-examples/vidu/stylish_woman.webp"
  },
  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/q4/image-to-video)
- [API Documentation](https://fal.ai/models/fal-ai/vidu/q4/image-to-video/api)
- [OpenAPI Schema](https://fal.ai/api/openapi/queue/openapi.json?endpoint_id=fal-ai/vidu/q4/image-to-video)

### fal.ai Platform

- [Platform Documentation](https://fal.ai/docs/documentation)
- [Python Client](https://fal.ai/docs/api-reference/client-libraries/python)
- [JavaScript Client](https://fal.ai/docs/api-reference/client-libraries/javascript)

### Other agent-readable surfaces

This file covers one model. To find anything else:

- [Platform overview](https://fal.ai/llms.txt): Entry points and representative endpoint IDs
- [Documentation index](https://fal.ai/docs/llms.txt): Every documentation page
- [Full documentation text](https://fal.ai/docs/llms-full.txt): The whole documentation inlined
- Any other model: `https://fal.ai/models/<endpoint-id>/llms.txt`