# Kling O3 Reference to Video [Pro] API

> Video ya Pro kutoka marejeo inayodumisha uthabiti wa wahusika na vitu kwa kutumia picha na vipengele

Huunda mandhari za video kutoka kwa `image_urls` za marejeo zinazotajwa kama @Image1 na kuendelea, pamoja na `elements` za wahusika au vitu. `start_image_url` na `end_image_url` za hiari huweka fremu ya kwanza na ya mwisho. Muda ni sekunde 3 hadi 15, uwiano wa picha 16:9, 9:16 au 1:1. Inaauni picha za `multi_prompt` na sauti ya hiari.

- Model id: `kling-video/o3/pro/reference-to-video`
- Made by: Kling
- Category: Reference to Video
- Output: video
- Price: from $0.112 / second (5 s ≈ $0.56) (cheapest run $0.56 (560 API credits))
- Run: `POST https://api.doitong.ru/v1/run/kling-video/o3/pro/reference-to-video`
- Quote: `POST https://api.doitong.ru/v1/quote/kling-video/o3/pro/reference-to-video`
- Docs page: https://doitong.com/sw/developers/models/kling-video/o3/pro/reference-to-video

## Pricing

Price: **from $0.112 / second (5 s ≈ $0.56)** (the lowest tier; the quote prices your exact input). Billed per second of output (`duration`, default 15).

Price rules (the first rule that matches the input wins; a parameter you leave out counts as its default):

- When `generate_audio` = true: $0.14 (140 API credits) / second

The full example input below costs $0.56 = 560 API credits (5 s × 112 API credits).

Prices are the upstream price in USD, paid from the API balance in API credits (1000 API credits = 1 USD). `POST https://api.doitong.ru/v1/quote/kling-video/o3/pro/reference-to-video` with the same JSON body returns the exact price for that input; the quote is exactly what a run charges. Invalid input is never charged and failed or canceled requests are refunded automatically.

## Input parameters

Send either the canonical name or the native field name (not both). Canonical names are the same across models.

| Parameter | Canonical name | Type | Required | Default | Allowed values / range | Description |
|---|---|---|---|---|---|---|
| `enable_safety_checker` |  | boolean | no | `true` |  | Ukaguzi wa usalama unaweza kuzimwa tu kwa idhini ya akaunti; maombi yasiyo na idhini hukaguliwa kila wakati. |
| `prompt` |  | string \| null | no |  | ≤ 2500 characters | Maelekezo ya maandishi yanayotumiwa kutengeneza video. Wasilisha kidokezo au multi_prompt moja pekee. |
| `multi_prompt` |  | array of object {prompt, duration} \| null | no |  |  | Orodha ya vidokezo inayotumiwa kuzalisha video yenye picha nyingi. |
| `multi_prompt[].prompt` |  | string | yes |  |  | Maagizo ya maandishi ya picha ya sasa. |
| `multi_prompt[].duration` |  | enum (string) | no | `5` | `1`, `2`, `3`, `4`, `5`, `6`, `7`, `8`, `9`, `10`, `11`, `12`, `13`, `14`, `15` | Urefu wa picha ya sasa, unaopimwa kwa sekunde. |
| `start_image_url` | `image` | string (image URL) \| null | no |  |  | Picha inayotumiwa kwa fremu ya mwanzo ya video. Ukubwa wa faili lazima usizidi 50 MB; upana na urefu lazima kila kimoja kiwe angalau 300px, na uwiano wa pande uwe kati ya 0.40 na 2.50. |
| `end_image_url` | `end_image` | string (image URL) \| null | no |  |  | Picha inayotoa fremu ya mwisho ya video, yenye kikomo cha 50 MB. Upana na urefu lazima kila kimoja kiwe angalau 300 px, na uwiano wa pande uwe kutoka 0.40 hadi 2.50. |
| `image_urls` | `images` | array of image URL \| null | no |  |  | Picha zinazoongoza mtindo au mwonekano, zinazorejelewa kwenye kidokezo kwa kutumia @Image1, @Image2, na kuendelea. Kwa ingizo la video, vipengele na picha za marejeleo kwa pamoja haviwezi kuzidi maingizo 4. Kila faili ina kikomo cha 50 MB, huku upana na urefu kila kimoja kikiwa angalau 300 px na uwiano wa pande ukiwa kutoka 0.40 hadi 2.50. |
| `elements` |  | array of object {frontal_image_url, reference_image_urls, video_url, voice_id} \| null | no |  |  | Wahusika au vitu vya kujumuisha, vinavyorejelewa kwenye kidokezo kwa kutumia @Element1 na @Element2. |
| `elements[].frontal_image_url` |  | string (image URL) \| null | no |  |  | Picha ya mbele inayoonyesha mwonekano mkuu wa kipengele. Ukubwa wa faili lazima usizidi 50 MB; upana na urefu lazima kila kimoja kiwe angalau 300px, na uwiano wa pande uwe kati ya 0.40 na 2.50. |
| `elements[].reference_image_urls` |  | array of image URL \| null | no |  |  | Toa picha 1–3 za ziada za marejeleo zinazoonyesha pembe tofauti. Kila picha lazima iwe na uwiano wa pande kati ya 0.40 na 2.50, iwe na angalau 300px katika vipimo vyote viwili, na isiwe kubwa kuliko 50.0MB. |
| `elements[].video_url` |  | string (video URL) \| null | no |  |  | URL inayoelekeza kwenye video ya kipengele; kipengele kimoja pekee kwa kila ombi kinaweza kujumuisha video. Faili lazima iwe isiyozidi 200 MB, huku upana na urefu kila kimoja kikiwa kati ya 720px na 2160px. Urefu lazima uwe kati ya sekunde 3 na sekunde 10.05, na FPS kati ya 24.0 na 60.0. |
| `elements[].voice_id` |  | string \| null | no |  |  | Voice ID iliyotolewa kwa kipengele. Marejeleo ya kipengele hicho hutumia sauti yake iliyotolewa. |
| `generate_audio` |  | boolean | no | `false` |  | Hudhibiti ikiwa sauti asilia inazalishwa pamoja na video. |
| `duration` |  | enum (string) | no | `5` | `3`, `4`, `5`, `6`, `7`, `8`, `9`, `10`, `11`, `12`, `13`, `14`, `15` | Urefu wa video, kutoka sekunde 3 hadi 15. |
| `shot_type` |  | enum (string) | no | `customize` | `customize`, `intelligent` | Chagua jinsi uzalishaji wa picha nyingi unavyopanga picha zake; kuchagua 'intelligent' hukabidhi muundo wa picha kwa modeli. |
| `aspect_ratio` |  | enum (string) | no | `16:9` | `16:9`, `9:16`, `1:1` | Uwiano wa upana kwa urefu wa fremu katika video inayozalishwa. |

File parameters (`image`, `end_image`, `images`) take a public `https://` URL, a `data:` URI up to 10 MB, or the `file_url` of an upload from `POST /files`.

## Example input

Required parameters only:

```json
{}
```

A fuller example:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
}
```

## Run it

Set `DOITONG_API_KEY` to a key from https://doitong.com/developers/dashboard#keys. `?wait=20` returns the finished request in the same call when it is ready within 20 seconds; otherwise poll `GET /requests/{id}` (it also accepts `?wait=`), or pass `webhook_url`.

### curl

```bash
# Run the model; wait up to 20 s for the finished result in the same call
curl -X POST "https://api.doitong.ru/v1/run/kling-video/o3/pro/reference-to-video?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  }'

# Still "queued" or "running"? Poll with the id from the response:
curl "https://api.doitong.ru/v1/requests/REQUEST_ID?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY"
```

### JavaScript

```javascript
const API = "https://api.doitong.ru/v1";
const headers = {
  "Authorization": "Bearer " + process.env.DOITONG_API_KEY,
  "Content-Type": "application/json",
};

// Run the model; wait up to 20 s for the finished result in the same call
let res = await fetch(API + "/run/kling-video/o3/pro/reference-to-video?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  }),
});
let request = await res.json();
if (!res.ok) throw new Error(request.error.code + ": " + request.error.message);

// Not finished yet: long-poll until it is
while (request.status === "queued" || request.status === "running") {
  res = await fetch(API + "/requests/" + request.id + "?wait=20", { headers });
  request = await res.json();
}
if (request.status !== "succeeded") throw new Error(JSON.stringify(request.error));
console.log(request.outputs.map((o) => o.url), request.cost.credits + " API credits ($" + request.cost.usd + ")");
```

### Python

```python
import os
import requests

API = "https://api.doitong.ru/v1"
headers = {"Authorization": "Bearer " + os.environ["DOITONG_API_KEY"]}

payload = {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/kling-video/o3/pro/reference-to-video", params={"wait": 20}, json=payload, headers=headers)
request = r.json()
if not r.ok:
    raise RuntimeError(request["error"]["code"] + ": " + request["error"]["message"])

# Not finished yet: long-poll until it is
while request["status"] in ("queued", "running"):
    request = requests.get(API + "/requests/" + request["id"], params={"wait": 20}, headers=headers).json()
if request["status"] != "succeeded":
    raise RuntimeError(request["error"])
print([o["url"] for o in request["outputs"]], request["cost"]["credits"], "API credits", "$" + request["cost"]["usd"])
```

### MCP

The MCP server at `https://api.doitong.ru/v1/mcp` exposes the tools `search_models`, `get_model`, `quote`, `run`, `get_request`, `cancel_request`, `list_requests`, `create_upload` and `get_account`. A `run` call for this model:

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "run",
    "arguments": {
      "model_id": "kling-video/o3/pro/reference-to-video",
      "input": {
        "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
      },
      "wait_seconds": 20
    }
  }
}
```

## Response

Every call returns a request object. `status` is one of `queued`, `running`, `succeeded`, `failed`, `canceled`. `outputs` lists the generated files with URLs on our storage (kept forever, or 7 days with `?storage=temporary`; `storage` says which); `output` is the model's own result object with the same URLs.

```json
{
  "id": "req_8k2m4q7x1z9c3v5b6n0p2r4t",
  "object": "request",
  "model": "kling-video/o3/pro/reference-to-video",
  "status": "succeeded",
  "created_at": "2026-10-20T12:00:00Z",
  "started_at": "2026-10-20T12:00:02Z",
  "completed_at": "2026-10-20T12:00:09Z",
  "queue_position": null,
  "cost": {
    "credits": 560,
    "usd": "0.56",
    "charged": 560,
    "refunded": 0
  },
  "input": {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  },
  "output": {
    "video": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp4",
      "content_type": "video/mp4",
      "file_name": "0-output.mp4",
      "file_size": 1843200
    }
  },
  "outputs": [
    {
      "type": "video",
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp4",
      "content_type": "video/mp4",
      "file_size": 1843200,
      "width": 1280,
      "height": 720,
      "duration": 5,
      "stored": true
    }
  ],
  "error": null,
  "metrics": {
    "inference_seconds": 6.8
  },
  "urls": {
    "self": "https://api.doitong.ru/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.ru/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
```

### Output fields (`output`)

| Field | Type | Description |
|---|---|---|
| `video` | object {url, content_type, file_name, file_size} | Video iliyozalishwa na modeli. |

## Related models

- [Kling O3 Text to Video \[Pro\]](https://doitong.com/developers/models/kling-video/o3/pro/text-to-video.md) (`kling-video/o3/pro/text-to-video`): from $0.112 / second
- [Kling O3 Text to Video \[Standard\]](https://doitong.com/developers/models/kling-video/o3/standard/text-to-video.md) (`kling-video/o3/standard/text-to-video`): from $0.084 / second
- [Kling Video · O3 · 4k · Text to Video](https://doitong.com/developers/models/kling-video/o3/4k/text-to-video.md) (`kling-video/o3/4k/text-to-video`): $0.42 / second
- [Kling O3 Image to Video · Pro](https://doitong.com/developers/models/kling-video/o3/pro/image-to-video.md) (`kling-video/o3/pro/image-to-video`): from $0.112 / second
- [Kling O3 Image to Video · Standard](https://doitong.com/developers/models/kling-video/o3/standard/image-to-video.md) (`kling-video/o3/standard/image-to-video`): from $0.084 / second
- [Kling Video · O3 · 4k · Image to Video](https://doitong.com/developers/models/kling-video/o3/4k/image-to-video.md) (`kling-video/o3/4k/image-to-video`): $0.42 / second
- [Kling O3 Reference to Video \[Standard\]](https://doitong.com/developers/models/kling-video/o3/standard/reference-to-video.md) (`kling-video/o3/standard/reference-to-video`): from $0.084 / second
- [Kling Video · O3 · 4k · Reference to Video](https://doitong.com/developers/models/kling-video/o3/4k/reference-to-video.md) (`kling-video/o3/4k/reference-to-video`): $0.42 / second

## Links

- HTML page: https://doitong.com/developers/models/kling-video/o3/pro/reference-to-video
- All models and guides for AI agents: https://doitong.com/developers/llms.txt
- OpenAPI 3.1 with this model's typed request body: https://doitong.com/developers/openapi.json?model=kling-video/o3/pro/reference-to-video
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.ru/v1/models/kling-video/o3/pro/reference-to-video