# Heygen · Avatar4 · Image to Video API

> ᡝᠮᡠᠨᡳ ᡩᡝ ᠨᡳᠶᠠᠯᠠ ᡳ ᠵᡳᠯᡤᠠᠨ ᡩᡝᠴᡳ ᠰᡳᠮᡝ ᠵᠠᠯᠠᠪᡠᡵᡝ ᡳᠯᡥᠠᠨ ᠪᡠᠵᡝᡵᡝᠪᡳ, ᠰᡳᠮᡝ ᠵᠠᠯᠠᠪᡠᡵᡝ ᡳ ᠮᡠᡯᡝᠨ ᠵᠠᠯᠠᠪᡠᡵᡝ ᠠᡳᠯᠠ ᠵᠠᠯᠠᠨ

ᠵᡠᠸᡝᠨ ᠠᡳᠯᠠ ᡤᡡᠯᡳᠮᡝ ᡳ ᠵᡳᠯᡤᠠᠨ ᡩᡝᠴᡳ ᠵᠠᠯᠠᠪᡠᡵᡝ ᠵᠠᠯᠠᠨ ᡳ ᠪᡳᠳᡝᠨ ᠪᡠᠵᡝᡵᡝᠪᡳ. `prompt` ᡩᡝ ᠵᠠᠯᠠᠪᡠᡵᡝ ᡥᡝᠯᡥᡝᠨ ᠠᡳᠯᠠ `voice` ᡳ ᠵᠣᠯᠣ, ᠠᡳᠯᠠ `audio_url` ᡳ ᠪᡠᠶᡝ. `talking_style` stable ᠠᡳᠯᠠ expressive ᡩᡝ ᠵᠠᠯᠠᠪᡠᡵᡝᠪᡳ. ᠵᠠᠯᠠᠨ ᡳ ᡝᠵᡝᠨ, ᠵᠠᠯᠠᠨ, caption ᠠᡳᠯᠠ 360p ᡩᡝᠴᡳ 1080p ᡳ ᠵᡳᠯᡤᠠᠨ ᠵᠠᠯᠠᠪᡠᡵᡝᠪᡳ.

- Model id: `heygen/avatar4/image-to-video`
- Made by: HeyGen
- Category: Lipsync & Avatars
- Output: video
- Price per second of your input audio: $0.10 / second of input audio (cheapest run $0.10 (100 API credits))
- Run: `POST https://api.doitong.ru/v1/run/heygen/avatar4/image-to-video`
- Quote: `POST https://api.doitong.ru/v1/quote/heygen/avatar4/image-to-video`
- Docs page: https://doitong.com/mnc/developers/models/heygen/avatar4/image-to-video

## Pricing

Price: **$0.10 / second of input audio**. Price per second of your input audio: 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 $1.00 = 1000 API credits (10 s input audio × $0.10).

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/heygen/avatar4/image-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 |
|---|---|---|---|---|---|---|
| `image_url` | `image` | string (image URL) | yes |  |  | ᠠᠨᡳᠮᠠᠴᡳᠨᡳ ᠵᠠᠯᠠᠨ ᠪᡝ ᠤᠨᡩᡝᠰᡳᠯᡝᠩᡤᡝ ᡤᠠᠳᠠᠨᡳ URL ᠠᠰᡳᠮᡝ; ᡝᠮᡠ ᠵᠠᠯᠠᠨ ᠪᡝ ᠨᡳᠶᠠᠯᠮᠠᡳ ᠵᠠᠯᠠᠨ ᠪᡝ ᠵᡝᠯᡤᡳᠶᡝᠨ ᠠᠰᡳᠮᡝ. |
| `prompt` |  | string \| null | no |  |  | ᠠᠪᡴᠠᡳ ᠠᠮᠠᠯᠠᠮᡝ ᡥᡡᠯᠠᠨ. |
| `voice` |  | enum (string) \| null | no |  | `Warm Pro Narrator`, `Chill Brian`, `Ivy`, `John Doe`, `Monika Sogam`, `Hope `, `Archer `, `Brittney`, `Patrick`, `David Castlemore`, `Michael C`, `Adam Stone `, `Juniper`, `Cassidy `, `Jessica Anne Bogart`, `Arabella`, `Andrew`, `Spuds Oxley `, `Grace Elder`, `Helen`, `Canyon Rivers`, `Derya - Lifelike - Excited 🤩`, `Mellow Marcus`, `Jack Sterling - Broadcaster 🎙️`, `Brenda - UGC - 1.mp4`, `Reid`, `Reagan`, `Terry`, `Jenny`, `Radio Rick`, `Denise`, `Tim in car - Excited 🤩`, `Iskander`, `Thompson`, `Delicate Daisy - Excited 🤩`, `Kingston`, `George UGC 1`, `Bold Blake`, `Jane`, `Expressive Evan`, `Marianne - IA`, `Aaron`, `Modern Recipe Host - Voice 1`, `Willow`, `Cute Chloe - Friendly 😊`, `Rafael`, `June - Lifelike`, `Crisp Chloe`, `Slick Simon`, `Nassim - Informative`, `Baritone Ben`, `Maxwell`, `Ellie Faye - Excited 🤩`, `Milani`, `Feisty Fiona - Excited 🤩`, `Professor Dean`, `Rose - UGC - 1.mp4`, `Shona`, `Hudson Wilder`, `Ann - IA`, `Alastair Kensington`, `Oxley`, `Christina`, `Andrew Rizz `, `Peyton`, `Gerardo - Outdoor`, `Chloe - Lifelike`, `Stephanie`, `Anthony - IA`, `Signal - Voice 1`, `Luca`, `Lisa - Voice 1`, `T.W.Tucker`, `Jack Sullivan - Serious 😐`, `Winter`, `Mireia - Lifelike`, `Georgia`, `Stella`, `Masha - Lifelike`, `Charming Charles - Friendly 😊`, `Serenity`, `Annie - Excited`, `Ralph`, `Bethany`, `Dominic`, `Mason Finn`, `Leena`, `Veteran Victor`, `Tamara`, `Nik Public`, `Calm Chloe`, `Sevik`, `Reilly`, `Raul`, `Imposing Ian`, `Relaxed Ray`, `Dexter - Professional`, `Relaxed Rick`, `Edwin`, `Rupert Blackwood`, `Ginny`, `Hope` | ᠠᠪᡴᠠᡳ ᡤᡳᠰᡠᠨᡳ ᠮᡠᠰᡝ ᠵᠠᠯᠠᠨ. |
| `audio_url` | `audio` | string (audio URL) \| null | no |  |  | ᠮᡠᠰᡝᡳ ᡤᡳᠰᡠᠨᡳ ᡶᡳᠯᡝ URL ᠠᠰᡳᠮᡝ, ᠪᠠᡵᡳᠨᡳ ᡥᡡᠯᠠᠨ ᠪᡝ ᠠᠰᡳᠮᡝ ᠠᠪᡴᠠᡳ ᠵᠠᠯᠠᠨ ᠪᡝ ᠠᠰᡳᠮᡝ. |
| `talking_style` |  | enum (string) | no | `stable` | `stable`, `expressive` | ᡤᡳᠰᡠᠨᡳ ᠠᠨᡳᠮᠠᠴᡳᠨᡳ ᠵᠠᠯᠠᠨ: 'stable' ᠵᠠᠯᠠᠨᡳ ᠵᠠᠯᠠᠨ ᠪᡝ ᠠᠯᡥᠠᠨ, 'expressive' ᠨᡳᠶᠠᠯᠮᠠ ᠵᠠᠯᠠᠨ ᠪᡝ ᠨᡝᠮᡝᠮᠪᡳ. |
| `expression` |  | string \| null | no |  |  | ᡤᠠᠳᠠᠨᡳ ᠵᠠᠯᠠᠨᡩᡝ ᠵᠠᠯᠠᠨ ᠠᠰᡳᠮᡝ. |
| `background` |  | object {type, value} | no |  |  | ᠵᡠᠯᡤᡝᠨᡳ ᠵᠠᠯᠠᠨ. |
| `background.type` |  | enum (string) | no | `color` | `color`, `image`, `video` | ᠵᡠᠯᡤᡝᠨᡳ ᠵᠠᠯᠠᠨᡳ ᠠᠰᡳᠮᡝ. |
| `background.value` |  | string | no | `#FFFFFF` |  | ᠵᡠᠯᡤᡝᠨᡳ ᠠᠮᠠᠯᠠᠨ: ᠵᠠᠯᠠᠨ `color` ᠪᡝ ᠮᡳᠨᡳ ᠴᠠᡤᠠᠨ ᠠᠰᡳᠮᡝ, `image` ᠠᡳ ᠰᡠᠨᡤᠠ ᠪᡝ URL ᠠᠰᡳᠮᡝ. |
| `resolution` |  | enum (string) | no | `720p` | `360p`, `480p`, `540p`, `720p`, `1080p` | ᠰᡠᠨᡤᠠᡳ ᠵᠠᠯᠠᠨ: 360p, 480p, 540p, 720p, ᠠᡠᡵᡳ 1080p. |
| `aspect_ratio` |  | enum (string) | no | `16:9` | `16:9`, `9:16`, `4:5`, `5:4`, `1:1`, `auto` | ᠰᡠᠨᡤᠠᡳ ᠵᠠᠯᠠᠨᡳ ᠵᠠᠯᠠᠨ ᠪᡝ ᠠᠰᡳᠮᡝ: 'auto' HeyGen ᠪᡝ ᠵᠠᠯᠠᠨᡳ ᠵᠠᠯᠠᠨ ᠪᡝ ᠠᠰᡳᠮᡝ ᠪᡝ ᠠᠮᠠᠯᠠᠮᡝ ᠠᠰᡳᠮᡝ, ᠠᡴᡳ ᠪᡝ '16:9' ᠠᠰᡳᠮᡝ. ᠵᠠᠯᠠᠨᡳ ᠠᠰᡳᠮᡝᠮᠪᡳ: '16:9', '9:16', '4:5', '5:4', ᠠᡴᡳ '1:1'. |
| `caption` |  | boolean | no | `false` |  | ᠰᡠᠨᡤᠠᡩᡝ ᠵᡝᠯᡤᡳᠶᡝᠨ ᠪᡝ ᠠᠰᡳᠮᡝ ᠠᠮᠠᠯᠠᠮᡝ. |
| `enable_safety_checker` |  | boolean | no | `true` |  | ᠠᠰᡠᡵᠠᠮᡝ ᠠᠨᡩᠠ ᠪᡳᠮᡝ ᠰᠠᡳᠨ᠈ ᠵᡠᠴᡝᠨ ᠵᡠᠰᡝ ᠠᠰᡠᡵᠠᠮᡝ᠉ |

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

A fuller example:

```json
{
  "image_url": "https://content.doitong.com/images/showcase/v3/avatar/talking_avatar.jpg",
  "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/heygen/avatar4/image-to-video?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "image_url": "https://content.doitong.com/images/showcase/v3/avatar/talking_avatar.jpg",
    "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/heygen/avatar4/image-to-video?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "image_url": "https://content.doitong.com/images/showcase/v3/avatar/talking_avatar.jpg",
    "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 = {
    "image_url": "https://content.doitong.com/images/showcase/v3/avatar/talking_avatar.jpg",
    "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/heygen/avatar4/image-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": "heygen/avatar4/image-to-video",
      "input": {
        "image_url": "https://content.doitong.com/images/showcase/v3/avatar/talking_avatar.jpg",
        "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": "heygen/avatar4/image-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": 1000,
    "usd": "1.00",
    "charged": 1000,
    "refunded": 0
  },
  "input": {
    "image_url": "https://content.doitong.com/images/showcase/v3/avatar/talking_avatar.jpg",
    "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
    }
  },
  "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} | ᠪᡠᠶᡝᠮᡝᠨᡳ ᠰᡠᠨᡤᠠ ᠶᠠᠪᡠᠮᡝ ᡶᡳᠯᡝ. |

## Related models

- [Heygen · Avatar4 · Digital Twin](https://doitong.com/developers/models/heygen/avatar4/digital-twin.md) (`heygen/avatar4/digital-twin`): $0.10 / second of input audio
- [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
- [Heygen Lipsync - Precision](https://doitong.com/developers/models/heygen/v3/lipsync/precision.md) (`heygen/v3/lipsync/precision`): $0.10 / second of output video
- [Heygen Lipsync - Speed](https://doitong.com/developers/models/heygen/v3/lipsync/speed.md) (`heygen/v3/lipsync/speed`): $0.05 / second of output video
- [Heygen v5 Digital Twin](https://doitong.com/developers/models/heygen/avatar5/digital-twin.md) (`heygen/avatar5/digital-twin`): $0.10 / second of input audio
- [Heygen · Avatar3 · Digital Twin](https://doitong.com/developers/models/heygen/avatar3/digital-twin.md) (`heygen/avatar3/digital-twin`): $0.034 / second of input audio

## Links

- HTML page: https://doitong.com/developers/models/heygen/avatar4/image-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=heygen/avatar4/image-to-video
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.ru/v1/models/heygen/avatar4/image-to-video