# Ltx 2.3 Quality · Outpaint · LoRA API

> Easphéinteáil físeáin de réir cóimheasa gnéithe le suas le 3 LoRA saincheaptha curtha i bhfeidhm

Easphéinteálann sé físeán ar spás níos mó agus éilíonn sé liosta `loras` de suas le 3 LoRA saincheaptha (3 GB an ceann). Socraigh `aspect_ratio` (21:9 go 9:21) agus `output_resolution` (480p, 720p nó 1080p), chomh maith le `prompt` do na limistéir nua. Réimsíonn `source_scale` ó 0.25 go 1, agus coinníonn `video_strength` an t-ábhar bunaidh slán.

- Model id: `ltx-2.3-quality/outpaint/lora`
- Made by: Lightricks
- Category: Video to Video
- Output: video
- Price per megapixel of your output video: $0.00271 / megapixel of output video (cheapest run $0.003 (3 API credits))
- Run: `POST https://api.doitong.com/v1/run/ltx-2.3-quality/outpaint/lora`
- Quote: `POST https://api.doitong.com/v1/quote/ltx-2.3-quality/outpaint/lora`
- Docs page: https://doitong.com/ga/developers/models/ltx-2.3-quality/outpaint/lora

## Pricing

Price: **$0.00271 / megapixel of output video**. Price per megapixel 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.

The full example input below costs $0.304 = 304 API credits (112 MP output video × $0.002708).

Prices are the upstream price in USD, paid from the API balance in API credits (1000 API credits = 1 USD). `POST https://api.doitong.com/v1/quote/ltx-2.3-quality/outpaint/lora` 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 |
|---|---|---|---|---|---|---|
| `prompt` |  | string | yes |  |  | Téacs a threoraíonn giniúint réigiún leathnaithe an fhíseáin. |
| `video_url` | `video` | string (video URL) | yes |  |  | Físeán foinse a leathnófar a theorainneacha spásúla trí outpainting. |
| `aspect_ratio` |  | enum (string) | no | `16:9` | `21:9`, `16:9`, `4:3`, `1:1`, `3:4`, `9:16`, `9:21` | Cóimheas gné outpainting; mar shampla, is féidir ionchur 4:3 a leathnú go 16:9. Roghnaigh cóimheas atá difriúil ó chóimheas na foinse chun an fráma a leathnú go glan. |
| `output_resolution` |  | enum (string) | no | `720p` | `480p`, `720p`, `1080p` | Sraith taifigh aschuir, agus an rogha chothrom 720p mar réamhshocrú. Roghnaigh 480p le haghaidh giniúna níos tapúla nó 1080p le haghaidh canbháis níos mó, ar choinníoll go n-oireann sé do theorainneacha LTX. |
| `resolution` |  | object {width, height} \| enum (string) | no | `landscape_16_9` | `auto`, `square_hd`, `square`, `portrait_4_3`, `portrait_16_9`, `landscape_4_3`, `landscape_16_9` | Toisí beachta na canbhása leis an socrú oidhreachta, coinnithe ar mhaithe le comhoiriúnacht siar. Ba cheart d’iarratais nua `aspect_ratio` a úsáid in éineacht le `output_resolution`. |
| `source_scale` |  | number | no | `1` | 0.25 – 1 | Scála an fhíseáin fhoinse laistigh den chanbhás sprice roimh outpainting; má laghdaítear é cruthaítear teorainn súmála amach agus bíonn na torthaí níos éagobhsaí. Le fíorleathnú cóimheasa gnéithe, amhail 4:3 go 16:9, moltar an socrú 1.0 chun an fhoinse a fheistiú ar an méid is mó is féidir sa chanbhás. |
| `video_strength` |  | number | no | `1` | 0 – 1 | Rialaíonn sé coinneáil an fhíseáin bhunaidh sa chanbhás outpainted trí threoir físeáin IC-LoRA; coinníonn luach níos airde an fhoinse níos dlúithe. |
| `num_frames` |  | integer | no | `121` | 9 – 481 | Líon na bhfrámaí don aschur ginte. |
| `frames_per_second` |  | number | no | `24` | 1 – 60 | Ráta fráma físeáin aschuir, tomhaiste ina fhrámaí sa soicind. |
| `num_inference_steps` |  | integer | no | `15` | 8 – 30 | Socraigh cé mhéad céim tátail atá le rith, suas le 30; má fhágtar gan athrú é, úsáidtear 15. |
| `guidance_scale` |  | number | no | `1` | 1 – 20 | Coigeartaigh treoir saor ó aicmitheoir ag úsáid an scála seo; díríonn a thiúnadh réamhshocraithe ar ardchaighdeán agus giniúint thapa araon. |
| `generate_audio` |  | boolean | no | `true` |  | Scorán riain fuaime don MP4 a chuirtear ar ais: cruthaíonn as comhad físeáin amháin, agus cuireann air fuaim san áireamh. |
| `negative_prompt` |  | string | no | `color distortion, overexposure, static, blurry details, subtitles, style, artwork, painting, frame, still, dim overall tone, worst quality, low quality, JPEG compression artifacts, ugly, mutilated, extra fingers, poorly drawn hands, poorly drawn face, deformed, disfigured, malformed limbs, fused fingers, motionless frame, cluttered background, three legs, crowded background, walking backwards` |  | Leid dhiúltach a shonraíonn cad ba cheart don ghiniúint a sheachaint. |
| `seed` |  | integer \| null | no |  |  | Síol a fhágann giniúint in-atáirgthe. Má shocraítear é go None, roghnaítear síol go randamach. |
| `enable_prompt_expansion` |  | boolean | no | `true` |  | Rialaíonn sé an bhfuil leathnú na leide cumasaithe. |
| `enable_safety_checker` |  | boolean | no | `true` |  | Rialaíonn sé an bhfuil seiceáil sábháilteachta cumasaithe. |
| `video_quality` |  | enum (string) | no | `high` | `low`, `medium`, `high`, `maximum` | Réamhshocrú cáilíochta a chuirtear i bhfeidhm ar an bhfíseán aschuir. |
| `video_write_mode` |  | enum (string) | no | `balanced` | `fast`, `balanced`, `small` | Mód scríofa an fhíseáin a bheidh mar thoradh air. |
| `loras` |  | array of object {path, scale, transformer} | yes |  | ≤ 3 items | Breiseanna LoRA do LTX-2.3, gach ceann teoranta do 3 GB, agus ceadaítear 3 iontráil ar a mhéad. Ní tharlaíonn an luchtú go dtí go n-aisghabhann íoslódálaí an chlárlainne atá sábháilte in aghaidh SSRF gach cosán. |
| `loras[].path` |  | string | yes |  | ≤ 2048 characters | URL díreach HTTP(S) do chomhad LoRA .safetensors nach mó ná 3 GB. Déantar aisghabháil le híoslódálaí atá sábháilte in aghaidh SSRF roimh luchtú. |
| `loras[].scale` |  | number | no | `1` | 0 – 2 | Méadaíonn tionchar LoRA ar an bhfíseán ginte de réir mar a ardaíonn an neart seo laistigh den raon 0.0–2.0. |
| `loras[].transformer` |  | enum (string) | no | `both` | `high`, `low`, `both` | Bratach roghnaithe Trasfhoirmeora: oireann 'both' do bheagnach gach úsáideoir LTX-2.3 toisc nach bhfuil ach trasfhoirmeoir amháin ag an tsamhail. Tá an bhratach ann chun tacú le hailtireachtaí amach anseo ina bhfuil iltrasfhoirmeoirí. |

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
{
  "loras": [
    {
      "path": "https://example.com/your-file.safetensors"
    }
  ],
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
  "video": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
}
```

A fuller example:

```json
{
  "loras": [
    {
      "path": "https://example.com/your-file.safetensors"
    }
  ],
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
  "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
}
```

## 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/ltx-2.3-quality/outpaint/lora?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "loras": [
      {
        "path": "https://example.com/your-file.safetensors"
      }
    ],
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
  }'

# 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/ltx-2.3-quality/outpaint/lora?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "loras": [
      {
        "path": "https://example.com/your-file.safetensors"
      }
    ],
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
  }),
});
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 = {
    "loras": [
        {
            "path": "https://example.com/your-file.safetensors",
        },
    ],
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/ltx-2.3-quality/outpaint/lora", 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": "ltx-2.3-quality/outpaint/lora",
      "input": {
        "loras": [
          {
            "path": "https://example.com/your-file.safetensors"
          }
        ],
        "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
        "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
      },
      "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": "ltx-2.3-quality/outpaint/lora",
  "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": 304,
    "usd": "0.304",
    "charged": 304,
    "refunded": 0
  },
  "input": {
    "loras": [
      {
        "path": "https://example.com/your-file.safetensors"
      }
    ],
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
  },
  "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,
    "prompt": "string"
  },
  "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} | An físeán a tháirg an tsamhail. |
| `seed` | integer | An síol iarbhír a chuirtear i bhfeidhm le linn giniúna. |
| `prompt` | string | Leid giniúna, lena n-áirítear aon leathnú a cuireadh i bhfeidhm roimh úsáid. |

## Related models

- [Ltx 2.3 Quality · Text to Video](https://doitong.com/developers/models/ltx-2.3-quality/text-to-video.md) (`ltx-2.3-quality/text-to-video`): $0.00241 / megapixel of output video
- [Ltx 2.3 Quality · Text to Video · LoRA](https://doitong.com/developers/models/ltx-2.3-quality/text-to-video/lora.md) (`ltx-2.3-quality/text-to-video/lora`): $0.00271 / megapixel of output video
- [Ltx 2.3 Quality · Image to Video](https://doitong.com/developers/models/ltx-2.3-quality/image-to-video.md) (`ltx-2.3-quality/image-to-video`): $0.00241 / megapixel of output video
- [Ltx 2.3 Quality · Image to Video · LoRA](https://doitong.com/developers/models/ltx-2.3-quality/image-to-video/lora.md) (`ltx-2.3-quality/image-to-video/lora`): $0.00271 / megapixel of output video
- [Ltx 2.3 Quality · Ingredient](https://doitong.com/developers/models/ltx-2.3-quality/ingredient.md) (`ltx-2.3-quality/ingredient`): $0.00241 / megapixel of output video
- [Ltx 2.3 Quality · Clean Plate](https://doitong.com/developers/models/ltx-2.3-quality/clean-plate.md) (`ltx-2.3-quality/clean-plate`): $0.00241 / megapixel of output video
- [Ltx 2.3 Quality · Colorization](https://doitong.com/developers/models/ltx-2.3-quality/colorization.md) (`ltx-2.3-quality/colorization`): $0.00241 / megapixel of output video
- [Ltx 2.3 Quality · Cross Eyed](https://doitong.com/developers/models/ltx-2.3-quality/cross-eyed.md) (`ltx-2.3-quality/cross-eyed`): $0.00241 / megapixel of output video

## Links

- HTML page: https://doitong.com/developers/models/ltx-2.3-quality/outpaint/lora
- 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=ltx-2.3-quality/outpaint/lora
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.com/v1/models/ltx-2.3-quality/outpaint/lora