# Live Portrait API

> Anime une image de portrait avec les expressions d'une vidéo de pilotage et des contrôles précis du visage

Transfère les mouvements du visage d'une vidéo de pilotage sur un portrait fixe pour produire une vidéo. Outre `video_url` et `image_url`, propose des contrôles numériques pour le clignement, les sourcils, le clin d'œil, les pupilles, les formes de bouche (aaa, eee, woo), le sourire et la rotation de la tête en pitch, yaw et roll. Des options de recadrage et d'assemblage comme `flag_do_crop` et `flag_pasteback` sont disponibles, et `dsize` définit la taille de sortie (512 par défaut).

- Model id: `live-portrait`
- Made by: Kuaishou
- Category: Lipsync & Avatars
- Output: video
- Charged by usage (up to $4.50 per run, typical $0.045; the rest of the hold is refunded): $0.00125 / second of processing time (cheapest run $0.045 (45 API credits))
- Run: `POST https://api.doitong.com/v1/run/live-portrait`
- Quote: `POST https://api.doitong.com/v1/quote/live-portrait`
- Docs page: https://doitong.com/fr/developers/models/live-portrait

## Pricing

Price: **$0.00125 / second of processing time**. Charged by actual usage at $0.00125 / second of processing time: up to $4.50 per run (the quote gives the maximum for your input), the rest is refunded automatically after the run. A typical run costs $0.045.

The full example input below holds up to $4.50 = 4500 API credits (up to 3600 s of processing time × $0.00125) when it starts; a typical run costs $0.045 (45 API credits).

Prices are the upstream price in USD, paid from the API balance in API credits (1000 API credits = 1 USD). This model is charged by usage: `POST https://api.doitong.com/v1/quote/live-portrait` with the same JSON body returns the most the run can cost for that input (`credits`, debited when the run starts); after the run you pay the usage the model reports and the rest is refunded automatically. An input whose maximum would exceed the per-run limit is refused with 422. 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 |
|---|---|---|---|---|---|---|
| `video_url` | `video` | string (video URL) | yes |  |  | URL vidéo utilisée pour piloter la synchronisation des lèvres. |
| `image_url` | `image` | string (image URL) | yes |  |  | URL de l’image à animer. |
| `blink` |  | number | no | `0` | -30 – 30 | Degré de clignement des yeux. |
| `eyebrow` |  | number | no | `0` | -30 – 30 | Degré de haussement ou d’abaissement des sourcils. |
| `wink` |  | number | no | `0` | 0 – 25 | Degré de clignement d’un œil. |
| `pupil_x` |  | number | no | `0` | -45 – 45 | Amplitude du mouvement horizontal des pupilles. |
| `pupil_y` |  | number | no | `0` | -45 – 45 | Amplitude du mouvement vertical des pupilles. |
| `aaa` |  | number | no | `0` | -200 – 200 | Degré d’ouverture de la bouche en forme de 'aaa'. |
| `eee` |  | number | no | `0` | -40 – 40 | Degré de positionnement de la bouche en forme de 'eee'. |
| `woo` |  | number | no | `0` | -100 – 100 | Degré de positionnement de la bouche en forme de 'woo'. |
| `smile` |  | number | no | `0` | -2 – 2 | Degré du sourire. |
| `flag_lip_zero` |  | boolean | no | `true` |  | Fermeture des lèvres avant animation, applicable uniquement lorsque flag_eye_retargeting et flag_lip_retargeting sont tous deux définis sur False. |
| `rotate_pitch` |  | number | no | `0` | -45 – 45 | Amplitude de rotation du visage sur l’axe de tangage. |
| `rotate_yaw` |  | number | no | `0` | -45 – 45 | Amplitude de rotation du visage sur l’axe de lacet. |
| `rotate_roll` |  | number | no | `0` | -45 – 45 | Amplitude de rotation du visage sur l’axe de roulis. |
| `flag_eye_retargeting` |  | boolean | no | `false` |  | Activation du retargeting des yeux. |
| `flag_lip_retargeting` |  | boolean | no | `false` |  | Activation du retargeting des lèvres. |
| `flag_stitching` |  | boolean | no | `true` |  | Activation de l’assemblage ; son activation est recommandée. |
| `flag_relative` |  | boolean | no | `true` |  | Activation du mouvement relatif. |
| `flag_pasteback` |  | boolean | no | `true` |  | Option de recollage/assemblage qui replace le recadrage du visage animé dans l’image originale, en le convertissant depuis les coordonnées du recadrage du visage. |
| `flag_do_crop` |  | boolean | no | `true` |  | Contrôle si le portrait source est recadré dans l’espace de coordonnées du recadrage du visage. |
| `flag_do_rot` |  | boolean | no | `true` |  | Contrôle si la rotation est effectuée lorsque flag_do_crop vaut true. |
| `dsize` |  | integer | no | `512` |  | Dimensions de l’image résultante. |
| `scale` |  | number | no | `2.3` |  | Multiplicateur d’échelle appliqué au recadrage du visage. |
| `vx_ratio` |  | number | no | `0` |  | Rapport contrôlant le décalage horizontal du recadrage du visage. |
| `vy_ratio` |  | number | no | `-0.125` |  | Rapport de positionnement vertical du recadrage du visage : le signe détermine la direction, vers le haut pour les valeurs positives et vers le bas pour les valeurs négatives. |
| `batch_size` |  | integer | no | `32` |  | Taille de lot du modèle, avec un compromis vitesse–mémoire : l’augmenter utilise plus de mémoire en échange d’une exécution plus rapide. |
| `enable_safety_checker` |  | boolean | no | `false` |  | Contrôle l’activation de la vérification de sécurité. Lorsqu’elle est active, le vérificateur traite l’image d’entrée pour confirmer qu’elle contient un visage avant le traitement par le modèle. |

File parameters (`video`, `image`) 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",
  "image": "https://content.doitong.com/images/showcase/v3/avatar/talking_avatar.jpg"
}
```

A fuller example:

```json
{
  "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
  "image_url": "https://content.doitong.com/images/showcase/v3/avatar/talking_avatar.jpg"
}
```

## 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.com/v1/run/live-portrait?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",
    "image_url": "https://content.doitong.com/images/showcase/v3/avatar/talking_avatar.jpg"
  }'

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

### JavaScript

```javascript
const API = "https://api.doitong.com/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/live-portrait?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
    "image_url": "https://content.doitong.com/images/showcase/v3/avatar/talking_avatar.jpg"
  }),
});
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.com/v1"
headers = {"Authorization": "Bearer " + os.environ["DOITONG_API_KEY"]}

payload = {
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
    "image_url": "https://content.doitong.com/images/showcase/v3/avatar/talking_avatar.jpg",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/live-portrait", 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.com/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": "live-portrait",
      "input": {
        "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
        "image_url": "https://content.doitong.com/images/showcase/v3/avatar/talking_avatar.jpg"
      },
      "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": "live-portrait",
  "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": 4500,
    "usd": "4.50",
    "charged": 4500,
    "refunded": 0
  },
  "input": {
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
    "image_url": "https://content.doitong.com/images/showcase/v3/avatar/talking_avatar.jpg"
  },
  "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.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
```

### Output fields (`output`)

| Field | Type | Description |
|---|---|---|
| `video` | object {url, content_type, file_name, file_size} | Fichier vidéo produit par la génération. |

## Related models

- [Live Portrait · Image](https://doitong.com/developers/models/live-portrait/image.md) (`live-portrait/image`): $0.00125 / second of processing time
- [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
- [AI Avatar Multi](https://doitong.com/developers/models/ai-avatar/multi.md) (`ai-avatar/multi`): from $0.20 / second of output video
- [AI Avatar Multi Text](https://doitong.com/developers/models/ai-avatar/multi-text.md) (`ai-avatar/multi-text`): from $0.648 / run
- [AI Avatar Single Text](https://doitong.com/developers/models/ai-avatar/single-text.md) (`ai-avatar/single-text`): from $4.688 / run
- [Avatar X](https://doitong.com/developers/models/mirage-api/avatar-x/text-to-video.md) (`mirage-api/avatar-x/text-to-video`): $54.00 / run

## Links

- HTML page: https://doitong.com/developers/models/live-portrait
- 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=live-portrait
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.com/v1/models/live-portrait