# Kling LipSync Text-to-Video API

> Nechá osobu ve videu mluvit zadaný text pomocí volitelného syntetického hlasu s nastavitelnou rychlostí

Generuje řeč synchronizovanou s pohyby rtů z textu namísto zvukového souboru. Zadejte `video_url`, `text` s nejvýše 120 znaky a `voice_id` vybraný ze seznamu přednastavených hlasů. `voice_language` je buď zh, nebo en a `voice_speed` je v rozsahu 0.8 až 2. Zdrojové video může být .mp4 nebo .mov, mít nejvýše 100MB, délku 2 až 60 sekund a rozlišení 720p nebo 1080p.

- Model id: `kling-video/lipsync/text-to-video`
- Made by: Kling
- Category: Lipsync & Avatars
- Output: video
- Price per second of your input video: $0.014 / second of input video (cheapest run $0.014 (14 API credits))
- Run: `POST https://api.doitong.ru/v1/run/kling-video/lipsync/text-to-video`
- Quote: `POST https://api.doitong.ru/v1/quote/kling-video/lipsync/text-to-video`
- Docs page: https://doitong.com/cs/developers/models/kling-video/lipsync/text-to-video

## Pricing

Price: **$0.014 / second of input video**. Price per second of your input video: the input files are measured before the run (length, resolution, frame rate). The quote measures the same files and is exactly what the run charges.

The full example input below costs $0.14 = 140 API credits (10 s input video × $0.014).

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/lipsync/text-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` |  | Bezpečnostní kontroly lze vypnout pouze s autorizací účtu; požadavky bez autorizace vždy procházejí kontrolou. |
| `video_url` | `video` | string (video URL) | yes |  |  | URL videa pro generování lip-sync. Přijímá soubory .mp4 nebo .mov do 100MB s délkou 2–60s, pouze v rozlišení 720p nebo 1080p; oba rozměry musí být v rozmezí 720–1920px. Při neúspěšné validaci vrací chybu. |
| `text` |  | string | yes |  | ≤ 120 characters | Text použitý ke generování videa s lip-sync, omezený na 120 znaků. |
| `voice_id` |  | enum (string) | yes |  | `genshin_vindi2`, `zhinen_xuesheng`, `AOT`, `ai_shatang`, `genshin_klee2`, `genshin_kirara`, `ai_kaiya`, `oversea_male1`, `ai_chenjiahao_712`, `girlfriend_4_speech02`, `chat1_female_new-3`, `chat_0407_5-1`, `cartoon-boy-07`, `uk_boy1`, `cartoon-girl-01`, `PeppaPig_platform`, `ai_huangzhong_712`, `ai_huangyaoshi_712`, `ai_laoguowang_712`, `chengshu_jiejie`, `you_pingjing`, `calm_story1`, `uk_man2`, `laopopo_speech02`, `heainainai_speech02`, `reader_en_m-v1`, `commercial_lady_en_f-v1`, `tiyuxi_xuedi`, `tiexin_nanyou`, `girlfriend_1_speech02`, `girlfriend_2_speech02`, `zhuxi_speech02`, `uk_oldman3`, `dongbeilaotie_speech02`, `chongqingxiaohuo_speech02`, `chuanmeizi_speech02`, `chaoshandashu_speech02`, `ai_taiwan_man2_speech02`, `xianzhanggui_speech02`, `tianjinjiejie_speech02`, `diyinnansang_DB_CN_M_04-v2`, `yizhipiannan-v1`, `guanxiaofang-v2`, `tianmeixuemei-v1`, `daopianyansang-v1`, `mengwa-v1` | Identifikátor hlasu použitého k syntéze řeči. |
| `voice_language` |  | enum (string) | no | `en` | `zh`, `en` | Jazyk spojený s vybraným Voice ID. |
| `voice_speed` |  | number | no | `1` | 0.8 – 2 | Rychlost mluvení použitá při generování videa z textu. |

File parameters (`video`) 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
{
  "video": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
  "text": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
  "voice_id": "genshin_vindi2"
}
```

A fuller example:

```json
{
  "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
  "text": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
  "voice_id": "genshin_vindi2"
}
```

## 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/lipsync/text-to-video?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
    "text": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "voice_id": "genshin_vindi2"
  }'

# 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/lipsync/text-to-video?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
    "text": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "voice_id": "genshin_vindi2"
  }),
});
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 = {
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
    "text": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "voice_id": "genshin_vindi2",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/kling-video/lipsync/text-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/lipsync/text-to-video",
      "input": {
        "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
        "text": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
        "voice_id": "genshin_vindi2"
      },
      "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/lipsync/text-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": 140,
    "usd": "0.14",
    "charged": 140,
    "refunded": 0
  },
  "input": {
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
    "text": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "voice_id": "genshin_vindi2"
  },
  "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 vytvořené modelem. |

## Related models

- [Kling LipSync Audio-to-Video](https://doitong.com/developers/models/kling-video/lipsync/audio-to-video.md) (`kling-video/lipsync/audio-to-video`): $0.014 / second of input video
- [Kling AI Avatar 2.0 Pro](https://doitong.com/developers/models/kling-video/ai-avatar/v2/pro.md) (`kling-video/ai-avatar/v2/pro`): $0.115 / second of input audio
- [Sync Lipsync 3](https://doitong.com/developers/models/sync-lipsync/v3.md) (`sync-lipsync/v3`): $8.00 / minute of output video
- [VEED Fabric 1.0](https://doitong.com/developers/models/veed/fabric-1.0.md) (`veed/fabric-1.0`): from $0.08 / second of input audio
- [Kling AI Avatar](https://doitong.com/developers/models/kling-video/v1/standard/ai-avatar.md) (`kling-video/v1/standard/ai-avatar`): $0.0562 / second of input audio
- [Kling AI Avatar Pro](https://doitong.com/developers/models/kling-video/v1/pro/ai-avatar.md) (`kling-video/v1/pro/ai-avatar`): $0.115 / second of input audio
- [Kling AI Avatar v2 Standard](https://doitong.com/developers/models/kling-video/ai-avatar/v2/standard.md) (`kling-video/ai-avatar/v2/standard`): $0.0562 / second of input audio
- [AI Avatar Multi](https://doitong.com/developers/models/ai-avatar/multi.md) (`ai-avatar/multi`): from $0.20 / second of output video

## Links

- HTML page: https://doitong.com/developers/models/kling-video/lipsync/text-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/lipsync/text-to-video
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.ru/v1/models/kling-video/lipsync/text-to-video