# Longcat Single Avatar · Audio to Video API

> صرف آڈیو فائل اور ٹیکسٹ پرامپٹ سے چلنے والی بولتی اوتار ویڈیو بناتا ہے، سورس تصویر کے بغیر

`audio_url` اور شخص کی وضاحت کرنے والے `prompt` سے ہونٹوں کے ساتھ ہم آہنگ اوتار ویڈیو بناتا ہے۔ آؤٹ پٹ 480p یا 720p ہے۔ `num_segments` (1 سے 10) دورانیہ طے کرتا ہے: پہلا حصہ تقریباً 5.8 سیکنڈ اور ہر اگلا حصہ 5 سیکنڈ بڑھاتا ہے۔ `audio_guidance_scale` (1 سے 10) طے کرتا ہے کہ گفتگو منہ کی حرکت کو کتنی شدت سے چلائے؛ زیادہ قدریں حرکت کو بڑھا چڑھا سکتی ہیں۔

- Model id: `longcat-single-avatar/audio-to-video`
- Made by: Meituan
- Category: Lipsync & Avatars
- Output: video
- Price per second of your output video: from $0.15 / second of output video (cheapest run $0.15 (150 API credits))
- Run: `POST https://api.doitong.ru/v1/run/longcat-single-avatar/audio-to-video`
- Quote: `POST https://api.doitong.ru/v1/quote/longcat-single-avatar/audio-to-video`
- Docs page: https://doitong.com/ur/developers/models/longcat-single-avatar/audio-to-video

## Pricing

Price: **from $0.15 / second of output video** (the lowest tier; the quote prices your exact input). Price per second of your output 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.

Price by tier:

- base rate: $0.15 / second of output video
- 720p: $0.60 / second of output video

The full example input below costs $0.90 = 900 API credits (6 s output video × $0.15).

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/longcat-single-avatar/audio-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 |
|---|---|---|---|---|---|---|
| `audio_url` | `audio` | string (audio URL) | yes |  |  | avatar چلانے کے لیے استعمال ہونے والی آڈیو فائل کا URL۔ |
| `prompt` |  | string | no | `A person is talking naturally with natural expressions and movements.` |  | ویڈیو تخلیق کی ہدایت دینے والا پرامپٹ۔ |
| `negative_prompt` |  | string | no | `Close-up, Bright tones, overexposed, static, blurred details, subtitles, style, works, paintings, images, static, overall gray, worst quality, low quality, JPEG compression residue, ugly, incomplete, extra fingers, poorly drawn hands, poorly drawn faces, deformed, disfigured, misshapen limbs, fused fingers, still picture, messy background, three legs, many people in the background, walking backwards` |  | ویڈیو تخلیق میں جس چیز سے گریز کرنا ہو اسے بیان کرنے والا negative پرامپٹ۔ |
| `num_inference_steps` |  | integer | no | `50` | 10 – 100 | انجام دیے گئے inference steps کی تعداد۔ |
| `text_guidance_scale` |  | number | no | `4` | 1 – 10 | classifier-free guidance میں لاگو متنی guidance scale۔ |
| `audio_guidance_scale` |  | number | no | `4` | 1 – 10 | آڈیو guidance adjustment؛ اضافہ ہونے پر منہ کی حرکت کو بڑھا چڑھا سکتا ہے۔ |
| `resolution` |  | enum (string) | no | `480p` | `480p`, `720p` | آؤٹ پٹ ویڈیو ریزولوشن، 480p یا 720p۔ |
| `num_segments` |  | integer | no | `1` | 1 – 10 | ویڈیو segments کی تعداد؛ ابتدائی segment تقریباً 5.8s اور ہر بعد والا segment 5s، یعنی فی segment تقریباً 5 سیکنڈ ویڈیو۔ |
| `seed` |  | integer \| null | no |  |  | سیڈ کی قدر جو بے ترتیب اعداد کی تخلیق شروع کرتی ہے۔ |
| `enable_safety_checker` |  | boolean | no | `true` |  | اکاؤنٹ اجازتوں سے مشروط حفاظتی جانچ کا ٹوگل؛ غیر مجاز درخواستوں کے لیے جانچ لازمی رہتی ہے اور اسے غیر فعال کرنے کے لیے اجازت درکار ہے۔ |
| `enable_prompt_expansion` |  | boolean | no | `false` |  | بہتر پرامپٹ کے ذریعے ویڈیو معیار بہتر بنانے کے لیے LLM پر مبنی پرامپٹ توسیع کا ٹوگل۔ |

File parameters (`audio`) 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
{
  "audio": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
}
```

A fuller example:

```json
{
  "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
}
```

## 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/longcat-single-avatar/audio-to-video?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
  }'

# 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/longcat-single-avatar/audio-to-video?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
  }),
});
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 = {
    "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/longcat-single-avatar/audio-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": "longcat-single-avatar/audio-to-video",
      "input": {
        "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
      },
      "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": "longcat-single-avatar/audio-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": 900,
    "usd": "0.90",
    "charged": 900,
    "refunded": 0
  },
  "input": {
    "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
  },
  "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
    },
    "seed": 42
  },
  "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} | تخلیق سے تیار کردہ ویڈیو فائل۔ |
| `seed` | integer | تخلیق کے دوران لاگو ہونے والی سیڈ قدر۔ |

## Related models

- [Longcat Single Avatar · Image Audio to Video](https://doitong.com/developers/models/longcat-single-avatar/image-audio-to-video.md) (`longcat-single-avatar/image-audio-to-video`): from $0.15 / second of output 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
- [Infinitalk](https://doitong.com/developers/models/infinitalk.md) (`infinitalk`): from $0.20 / second of output video
- [Infinitalk · Single Text](https://doitong.com/developers/models/infinitalk/single-text.md) (`infinitalk/single-text`): from $2.32 / run
- [Infinitalk · Video to Video](https://doitong.com/developers/models/infinitalk/video-to-video.md) (`infinitalk/video-to-video`): from $0.30 / second of output video
- [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/longcat-single-avatar/audio-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=longcat-single-avatar/audio-to-video
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.ru/v1/models/longcat-single-avatar/audio-to-video