# Kling LipSync Text-to-Video API

> 使用可选的合成语音和可调语速，让视频中的人物说出输入文本

根据文本而非音频文件生成口型同步语音。提供 `video_url`、最多 120 个字符的 `text`，以及从预设语音列表中选择的 `voice_id`。`voice_language` 为 zh 或 en，`voice_speed` 范围为 0.8 到 2。源视频可以是 .mp4 或 .mov，最大 100MB，时长为 2 到 60 秒，分辨率为 720p 或 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/zh/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` |  | 只有经过账户授权才能禁用安全检查；未经授权的请求始终会进行检查。 |
| `video_url` | `video` | string (video URL) | yes |  |  | 用于口型同步生成的视频 URL。接受最大 100MB、时长 2–60s、仅为 720p 或 1080p 的 .mp4 或 .mov 文件；两个维度都必须在 720–1920px 之间。验证失败时返回错误。 |
| `text` |  | string | yes |  | ≤ 120 characters | 用于生成口型同步视频的文本，限制为 120 个字符。 |
| `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` | 用于合成语音的语音标识符。 |
| `voice_language` |  | enum (string) | no | `en` | `zh`, `en` | 与所选 Voice ID 关联的语言。 |
| `voice_speed` |  | number | no | `1` | 0.8 – 2 | 从文本生成视频时使用的语速。 |

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} | 模型生成的视频。 |

## 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