# Grok Imagine Video 1.5 Reference to Video

> Generate videos from images and audio references using xAI's Grok Imagine 1.5 Video model.



## Overview

- **Endpoint**: `https://fal.run/xai/grok-imagine-video/v1.5/reference-to-video`
- **Model ID**: `xai/grok-imagine-video/v1.5/reference-to-video`
- **Category**: image-to-video
- **Kind**: inference
**Tags**: stylized, transform, lipsync



## Pricing

Priced per second of output video, by resolution: **480p** at **$0.08**/sec, **720p** at **$0.14**/sec. A 5-second 480p clip costs **$0.40**; 720p costs **$0.70**. Cost scales linearly with duration. Each reference image adds **$0.01** (1–7 supported). A reference audio clip, if provided, is included

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 describing the video. Tag references as <IMAGE_0>, <IMAGE_1>, etc.
  - Examples: "The person from <IMAGE_0> walks through a rainy neon-lit street."

- **`reference_image_urls`** (`list<string>`, _required_):
  One or more reference image URLs to guide the video generation as style and content references. Reference in prompt as <IMAGE_0>, <IMAGE_1>, etc. Maximum 7 images.
  - Array of string
  - Examples: ["https://v3b.fal.media/files/b/0a8b90e0/BFLE9VDlZqsryU-UA3BoD_image_004.png"]

- **`duration`** (`integer`, _optional_):
  Video duration in seconds. Default value: `8`
  - Default: `8`
  - Range: `1` to `15`

- **`resolution`** (`ResolutionEnum`, _optional_):
  Resolution of the output video. Default value: `"480p"`
  - Default: `"480p"`
  - Options: `"480p"`, `"720p"`

- **`aspect_ratio`** (`AspectRatioEnum`, _optional_):
  Aspect ratio of the generated video. Default value: `"16:9"`
  - Default: `"16:9"`
  - Options: `"16:9"`, `"4:3"`, `"3:2"`, `"1:1"`, `"2:3"`, `"3:4"`, `"9:16"`



**Required Parameters Example**:

```json
{
  "prompt": "The person from <IMAGE_0> walks through a rainy neon-lit street.",
  "reference_image_urls": [
    "https://v3b.fal.media/files/b/0a8b90e0/BFLE9VDlZqsryU-UA3BoD_image_004.png"
  ]
}
```

**Full Example**:

```json
{
  "prompt": "The person from <IMAGE_0> walks through a rainy neon-lit street.",
  "reference_image_urls": [
    "https://v3b.fal.media/files/b/0a8b90e0/BFLE9VDlZqsryU-UA3BoD_image_004.png"
  ],
  "duration": 8,
  "resolution": "480p",
  "aspect_ratio": "16:9"
}
```


### Output Schema

The API returns the following output format:

- **`video`** (`VideoFile`, _required_):
  The generated video.
  - Examples: {"duration":8,"url":"https://v3b.fal.media/files/b/0a8b90e4/r2v_output.mp4","fps":24,"height":720,"num_frames":192,"width":1280,"file_name":"r2v_output.mp4","content_type":"video/mp4"}



**Example Response**:

```json
{
  "video": {
    "duration": 8,
    "url": "https://v3b.fal.media/files/b/0a8b90e4/r2v_output.mp4",
    "fps": 24,
    "height": 720,
    "num_frames": 192,
    "width": 1280,
    "file_name": "r2v_output.mp4",
    "content_type": "video/mp4"
  }
}
```


## Usage Examples

### cURL

```bash
curl --request POST \
  --url https://fal.run/xai/grok-imagine-video/v1.5/reference-to-video \
  --header "Authorization: Key $FAL_KEY" \
  --header "Content-Type: application/json" \
  --data '{
     "prompt": "The person from <IMAGE_0> walks through a rainy neon-lit street.",
     "reference_image_urls": [
       "https://v3b.fal.media/files/b/0a8b90e0/BFLE9VDlZqsryU-UA3BoD_image_004.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(
    "xai/grok-imagine-video/v1.5/reference-to-video",
    arguments={
        "prompt": "The person from <IMAGE_0> walks through a rainy neon-lit street.",
        "reference_image_urls": ["https://v3b.fal.media/files/b/0a8b90e0/BFLE9VDlZqsryU-UA3BoD_image_004.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("xai/grok-imagine-video/v1.5/reference-to-video", {
  input: {
    prompt: "The person from <IMAGE_0> walks through a rainy neon-lit street.",
    reference_image_urls: ["https://v3b.fal.media/files/b/0a8b90e0/BFLE9VDlZqsryU-UA3BoD_image_004.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/xai/grok-imagine-video/v1.5/reference-to-video)
- [API Documentation](https://fal.ai/models/xai/grok-imagine-video/v1.5/reference-to-video/api)
- [OpenAPI Schema](https://fal.ai/api/openapi/queue/openapi.json?endpoint_id=xai/grok-imagine-video/v1.5/reference-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)