# Kling Video

> Generate audio from input videos using Kling


## Overview

- **Endpoint**: `https://fal.run/fal-ai/kling-video/video-to-audio`
- **Model ID**: `fal-ai/kling-video/video-to-audio`
- **Category**: video-to-audio
- **Kind**: inference


## Pricing

Your video request will cost $0.035 per video.

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:


- **`video_url`** (`string`, _required_):
  The video URL to extract audio from. Only .mp4/.mov formats are supported. File size does not exceed 100MB. Video duration between 3.0s and 20.0s.
  - Examples: "https://storage.googleapis.com/falserverless/model_tests/kling/kling-v2.5-turbo-pro-image-to-video-output.mp4"

- **`sound_effect_prompt`** (`string`, _optional_):
  Sound effect prompt. Cannot exceed 200 characters. Default value: `"Car tires screech as they accelerate in a drag race"`
  - Default: `"Car tires screech as they accelerate in a drag race"`

- **`background_music_prompt`** (`string`, _optional_):
  Background music prompt. Cannot exceed 200 characters. Default value: `"intense car race"`
  - Default: `"intense car race"`

- **`asmr_mode`** (`boolean`, _optional_):
  Enable ASMR mode. This mode enhances detailed sound effects and is suitable for highly immersive content scenarios.
  - Default: `false`



**Required Parameters Example**:

```json
{
  "video_url": "https://storage.googleapis.com/falserverless/model_tests/kling/kling-v2.5-turbo-pro-image-to-video-output.mp4"
}
```

**Full Example**:

```json
{
  "video_url": "https://storage.googleapis.com/falserverless/model_tests/kling/kling-v2.5-turbo-pro-image-to-video-output.mp4",
  "sound_effect_prompt": "Car tires screech as they accelerate in a drag race",
  "background_music_prompt": "intense car race"
}
```


### Output Schema

The API returns the following output format:

- **`video`** (`File`, _required_):
  The original video with dubbed audio applied
  - Examples: {"url":"https://v3.fal.media/files/monkey/O-ekVTtYqeDblD1oSf2uv_dubbed_video.mp4"}

- **`audio`** (`File`, _required_):
  The extracted/generated audio from the video in MP3 format
  - Examples: {"url":"https://v3.fal.media/files/monkey/O-ekVTtYqeDblD1oSf2uv_extracted_audio.mp3"}



**Example Response**:

```json
{
  "video": {
    "url": "https://v3.fal.media/files/monkey/O-ekVTtYqeDblD1oSf2uv_dubbed_video.mp4"
  },
  "audio": {
    "url": "https://v3.fal.media/files/monkey/O-ekVTtYqeDblD1oSf2uv_extracted_audio.mp3"
  }
}
```


## Usage Examples

### cURL

```bash
curl --request POST \
  --url https://fal.run/fal-ai/kling-video/video-to-audio \
  --header "Authorization: Key $FAL_KEY" \
  --header "Content-Type: application/json" \
  --data '{
     "video_url": "https://storage.googleapis.com/falserverless/model_tests/kling/kling-v2.5-turbo-pro-image-to-video-output.mp4"
   }'
```

### 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/kling-video/video-to-audio",
    arguments={
        "video_url": "https://storage.googleapis.com/falserverless/model_tests/kling/kling-v2.5-turbo-pro-image-to-video-output.mp4"
    },
    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/kling-video/video-to-audio", {
  input: {
    video_url: "https://storage.googleapis.com/falserverless/model_tests/kling/kling-v2.5-turbo-pro-image-to-video-output.mp4"
  },
  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/kling-video/video-to-audio)
- [API Documentation](https://fal.ai/models/fal-ai/kling-video/video-to-audio/api)
- [OpenAPI Schema](https://fal.ai/api/openapi/queue/openapi.json?endpoint_id=fal-ai/kling-video/video-to-audio)

### 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)