---
title: Kling Image-to-Video
url: https://runapi.ai/docs/api/kling/image-to-video.md
canonical: https://runapi.ai/docs/api/kling/image-to-video
locale: en
---

# Kling Image-to-Video

## Overview

Create an asynchronous text-to-video task with a supported model. Use the returned task ID to retrieve its state, or provide callback_url for terminal delivery.

### Quick start

1. Create an API key and set it as RUNAPI_API_KEY.
2. Choose a supported model and send a POST request whose body matches that model's schema.
3. Store the returned task ID, then poll until a terminal state or handle the terminal callback.

## Endpoint

POST /api/v1/kling/image_to_video

Base URL: https://runapi.ai

API version: v1

Authentication: Authorization: Bearer YOUR_API_TOKEN

## Supported models

Open a model page for current pricing, rate limits, and commercial-usage details.

- [kling-o1](/models/kling/o1)
- [kling-v2.1-master-image-to-video](/models/kling/v2.1-master-image-to-video)
- [kling-v2.1-pro](/models/kling/v2.1-pro)
- [kling-v2.1-standard](/models/kling/v2.1-standard)
- [kling-v2.5-turbo-image-to-video-pro](/models/kling/v2.5-turbo-image-to-video-pro)
- [kling-v2.6](/models/kling/v2.6)
- [kling-v3-omni](/models/kling/v3-omni)
- [kling-v3-turbo-image-to-video](/models/kling/v3-turbo-image-to-video)

## Request schema

Fields and allowed values depend on the selected model. When supplied, callback_url receives a terminal task delivery.

### kling-o1

```json
{
  "aspect_ratio": {
    "default": "16:9",
    "description": "Output aspect ratio.",
    "enum": [
      "16:9",
      "9:16",
      "1:1"
    ],
    "type": "string"
  },
  "callback_url": {
    "description": "Webhook URL for async notifications.",
    "type": "string"
  },
  "duration_seconds": {
    "default": 5,
    "description": "Duration in seconds.",
    "enum": [
      5
    ],
    "type": "integer"
  },
  "enable_sound": {
    "default": false,
    "description": "Sound generation must remain disabled.",
    "type": "boolean"
  },
  "first_frame_image_url": {
    "description": "Public HTTP(S) JPG, JPEG, or PNG first-frame image URL.",
    "required": true,
    "type": "string"
  },
  "last_frame_image_url": {
    "description": "Public HTTP(S) JPG, JPEG, or PNG final-frame image URL; cannot be combined with reference_image_urls or reference_video_url.",
    "type": "string"
  },
  "mode": {
    "default": "std",
    "description": "Generation mode.",
    "enum": [
      "std",
      "pro"
    ],
    "type": "string"
  },
  "model": {
    "description": "Model slug.",
    "required": true,
    "type": "string"
  },
  "preserve_reference_video_audio": {
    "default": false,
    "description": "Preserve the reference video's original audio.",
    "type": "boolean"
  },
  "prompt": {
    "description": "Video description; reference media with matching numbered markers.",
    "length": true,
    "max": 2500,
    "min": 1,
    "required": true,
    "type": "string"
  },
  "reference_image_urls": {
    "description": "Ordered public HTTP(S) JPG, JPEG, or PNG reference image URLs; cannot be combined with last_frame_image_url.",
    "items": {
      "type": "string"
    },
    "max_items": 7,
    "min_items": 1,
    "type": "array"
  },
  "reference_video_type": {
    "default": "base",
    "description": "Use the video as a base edit or feature reference.",
    "enum": [
      "base",
      "feature"
    ],
    "type": "string"
  },
  "reference_video_url": {
    "description": "Public HTTP(S) MP4 or MOV reference video URL; cannot be combined with last_frame_image_url.",
    "type": "string"
  }
}
```

### kling-v2.1-master-image-to-video

```json
{
  "aspect_ratio": {
    "description": "Output aspect ratio.",
    "type": "string"
  },
  "callback_url": {
    "description": "Webhook URL for async notifications.",
    "type": "string"
  },
  "cfg_scale": {
    "description": "Guidance scale (0-1).",
    "type": "number"
  },
  "duration_seconds": {
    "description": "Duration in seconds.",
    "enum": [
      5,
      10
    ],
    "type": "integer"
  },
  "first_frame_image_url": {
    "description": "First frame image URL.",
    "required": true,
    "type": "string"
  },
  "last_frame_image_url": {
    "description": "Final frame image URL for supported image-to-video models.",
    "type": "string"
  },
  "model": {
    "description": "Model slug.",
    "required": true,
    "type": "string"
  },
  "negative_prompt": {
    "description": "Negative prompt.",
    "type": "string"
  },
  "prompt": {
    "description": "Video description.",
    "required": true,
    "type": "string"
  }
}
```

### kling-v2.1-pro

```json
{
  "aspect_ratio": {
    "description": "Output aspect ratio.",
    "type": "string"
  },
  "callback_url": {
    "description": "Webhook URL for async notifications.",
    "type": "string"
  },
  "cfg_scale": {
    "description": "Guidance scale (0-1).",
    "type": "number"
  },
  "duration_seconds": {
    "description": "Duration in seconds.",
    "enum": [
      5,
      10
    ],
    "type": "integer"
  },
  "first_frame_image_url": {
    "description": "First frame image URL.",
    "required": true,
    "type": "string"
  },
  "last_frame_image_url": {
    "description": "Final frame image URL for supported image-to-video models.",
    "type": "string"
  },
  "model": {
    "description": "Model slug.",
    "required": true,
    "type": "string"
  },
  "negative_prompt": {
    "description": "Negative prompt.",
    "type": "string"
  },
  "prompt": {
    "description": "Video description.",
    "required": true,
    "type": "string"
  }
}
```

### kling-v2.1-standard

```json
{
  "aspect_ratio": {
    "description": "Output aspect ratio.",
    "type": "string"
  },
  "callback_url": {
    "description": "Webhook URL for async notifications.",
    "type": "string"
  },
  "cfg_scale": {
    "description": "Guidance scale (0-1).",
    "type": "number"
  },
  "duration_seconds": {
    "description": "Duration in seconds.",
    "enum": [
      5,
      10
    ],
    "type": "integer"
  },
  "first_frame_image_url": {
    "description": "First frame image URL.",
    "required": true,
    "type": "string"
  },
  "last_frame_image_url": {
    "description": "Final frame image URL for supported image-to-video models.",
    "type": "string"
  },
  "model": {
    "description": "Model slug.",
    "required": true,
    "type": "string"
  },
  "negative_prompt": {
    "description": "Negative prompt.",
    "type": "string"
  },
  "prompt": {
    "description": "Video description.",
    "required": true,
    "type": "string"
  }
}
```

### kling-v2.5-turbo-image-to-video-pro

```json
{
  "aspect_ratio": {
    "description": "Output aspect ratio.",
    "type": "string"
  },
  "callback_url": {
    "description": "Webhook URL for async notifications.",
    "type": "string"
  },
  "cfg_scale": {
    "description": "Guidance scale (0-1).",
    "type": "number"
  },
  "duration_seconds": {
    "description": "Duration in seconds.",
    "enum": [
      5,
      10
    ],
    "type": "integer"
  },
  "first_frame_image_url": {
    "description": "First frame image URL.",
    "required": true,
    "type": "string"
  },
  "last_frame_image_url": {
    "description": "Final frame image URL for supported image-to-video models.",
    "type": "string"
  },
  "model": {
    "description": "Model slug.",
    "required": true,
    "type": "string"
  },
  "negative_prompt": {
    "description": "Negative prompt.",
    "type": "string"
  },
  "prompt": {
    "description": "Video description.",
    "required": true,
    "type": "string"
  }
}
```

### kling-v2.6

```json
{
  "aspect_ratio": {
    "default": "16:9",
    "description": "Output aspect ratio.",
    "enum": [
      "16:9",
      "9:16",
      "1:1"
    ],
    "type": "string"
  },
  "callback_url": {
    "description": "Webhook URL for async notifications.",
    "type": "string"
  },
  "duration_seconds": {
    "default": 5,
    "description": "Duration in seconds.",
    "enum": [
      5,
      10
    ],
    "type": "integer"
  },
  "enable_sound": {
    "default": false,
    "description": "Enable sound generation; requires pro mode.",
    "type": "boolean"
  },
  "first_frame_image_url": {
    "description": "First frame image URL.",
    "required": true,
    "type": "string"
  },
  "last_frame_image_url": {
    "description": "Final frame image URL; requires pro mode and 5 seconds.",
    "type": "string"
  },
  "mode": {
    "default": "std",
    "description": "Generation mode.",
    "enum": [
      "std",
      "pro"
    ],
    "type": "string"
  },
  "model": {
    "description": "Model slug.",
    "required": true,
    "type": "string"
  },
  "prompt": {
    "description": "Video description.",
    "length": true,
    "max": 2500,
    "min": 1,
    "required": true,
    "type": "string"
  }
}
```

### kling-v3-omni

```json
{
  "aspect_ratio": {
    "default": "16:9",
    "description": "Output aspect ratio.",
    "enum": [
      "16:9",
      "9:16",
      "1:1"
    ],
    "type": "string"
  },
  "callback_url": {
    "description": "Webhook URL for async notifications.",
    "type": "string"
  },
  "duration_seconds": {
    "default": 5,
    "description": "Duration in seconds.",
    "enum": [
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15
    ],
    "type": "integer"
  },
  "enable_sound": {
    "default": false,
    "description": "Enable synchronized sound generation.",
    "type": "boolean"
  },
  "first_frame_image_url": {
    "description": "First frame image URL.",
    "required": true,
    "type": "string"
  },
  "last_frame_image_url": {
    "description": "Final frame image URL; requires a 5-second duration.",
    "type": "string"
  },
  "model": {
    "description": "Model slug.",
    "required": true,
    "type": "string"
  },
  "output_resolution": {
    "default": "720p",
    "description": "Output resolution.",
    "enum": [
      "720p",
      "1080p",
      "4k"
    ],
    "type": "string"
  },
  "prompt": {
    "description": "Video description.",
    "length": true,
    "max": 2500,
    "min": 1,
    "required": true,
    "type": "string"
  }
}
```

### kling-v3-turbo-image-to-video

```json
{
  "callback_url": {
    "description": "Webhook URL for async notifications.",
    "type": "string"
  },
  "duration_seconds": {
    "default": 5,
    "description": "Duration in seconds.",
    "enum": [
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15
    ],
    "type": "integer"
  },
  "first_frame_image_url": {
    "description": "First frame image URL.",
    "required": true,
    "type": "string"
  },
  "model": {
    "description": "Model slug.",
    "required": true,
    "type": "string"
  },
  "output_resolution": {
    "default": "720p",
    "description": "Output resolution.",
    "enum": [
      "720p",
      "1080p"
    ],
    "type": "string"
  },
  "prompt": {
    "description": "Video description.",
    "length": true,
    "max": 2500,
    "min": 1,
    "required": true,
    "type": "string"
  }
}
```

## Create acceptance

HTTP 202 - POST /api/v1/kling/image_to_video

```json
{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "id": "tsk_reference_demo",
  "status": "processing"
}
```

## Polling processing

HTTP 200 - GET /api/v1/kling/image_to_video/:id

```json
{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "id": "tsk_reference_demo",
  "status": "processing"
}
```

## Polling completed

HTTP 200 - GET /api/v1/kling/image_to_video/:id

```json
{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "id": "tsk_reference_demo",
  "status": "completed",
  "videos": [
    {
      "url": "https://file.runapi.ai/reference-video.mp4"
    }
  ]
}
```

## Polling failed

HTTP 200 - GET /api/v1/kling/image_to_video/:id

```json
{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "error": "Task processing failed.",
  "id": "tsk_reference_demo",
  "status": "failed"
}
```

## Customer callback: completed

HTTP 200 - POST callback_url

```json
{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "id": "tsk_reference_demo",
  "status": "completed",
  "videos": [
    {
      "url": "https://file.runapi.ai/reference-video.mp4"
    }
  ]
}
```

## Customer callback: failed

HTTP 200 - POST callback_url

```json
{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "error": {
    "code": "generation_failed",
    "message": "Task processing failed."
  },
  "id": "tsk_reference_demo",
  "status": "failed"
}
```

## Errors

HTTP 400

```json
{
  "error": {
    "code": "invalid_request",
    "message": "A required request field is missing."
  }
}
```

## Generated Code Samples

Use cURL directly, or install an SDK for your language. Each sample submits the validated request shown in this reference.

### curl

```curl
curl -X POST https://runapi.ai/api/v1/kling/image_to_video \
  -H 'Authorization: Bearer YOUR_API_TOKEN' \
  -H 'Content-Type: application/json' \
  -d '{"model":"kling-o1","prompt":"A gentle camera pan across the scene.","first_frame_image_url":"https://file.runapi.ai/first-frame.png"}'
```

## Related Guides

- [Authentication](/docs/guides/authentication)
- [Task API quickstart](/docs/guides/task-api/quickstart)