# LTX 2.3 Trainer (V2) - Video Inpainting API

> Traenálann sé LoRA le haghaidh inphéinteáil físeáin a athghineann réigiún maiscithe agus a fhágann an chuid eile gan athrú

Traenálann sé LoRA a líonann réigiún mascaithe d’fhíseán le hábhar nua cumasctha lena thimpeallacht agus an chuid eile gan athrú. Teastaíonn masc meaitseála ó gach gearrthóg sa zip ó `training_data_url`; tá scoilteadh radharcanna múchta de réir réamhshocraithe mar chuirfeadh sé gearrthóg agus masc as sioncronú. Glactar le suas le 2 shampla bailíochtaithe, gach ceann acu le leid, físeán foinse agus masc.

- Model id: `ltx23-trainer-v2/inpaint`
- Made by: Lightricks
- Category: Training
- Output: file
- Price: $0.0024 / step (cheapest run $4.80 (4800 API credits))
- Run: `POST https://api.doitong.com/v1/run/ltx23-trainer-v2/inpaint`
- Quote: `POST https://api.doitong.com/v1/quote/ltx23-trainer-v2/inpaint`
- Docs page: https://doitong.com/ga/developers/models/ltx23-trainer-v2/inpaint

## Pricing

Price: **$0.0024 / step**. Billed per training step (`number_of_steps`).

The full example input below costs $4.80 = 4800 API credits (2000 steps × 2.4 API credits).

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/ltx23-trainer-v2/inpaint` 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

| Parameter | Canonical name | Type | Required | Default | Allowed values / range | Description |
|---|---|---|---|---|---|---|
| `training_data_url` |  | string | yes |  |  | URL chuig `.zip` ina bhfuil sonraí oiliúna, eagraithe de réir an mhóid oiliúna roghnaithe. D’fhéadfadh comhad `.txt` fotheidealaithe le bunainm comhfhreagrach a bheith ag gabháil le gach comhad meán. |
| `rank` |  | enum (integer) | no | `32` | `8`, `16`, `32`, `64`, `128` | Rang oiriúnaithe LoRA, a mhalartaíonn tomhaltas cuimhne méadaithe ar acmhainn níos mó de réir mar a ardaíonn an socrú. |
| `number_of_steps` |  | integer | no | `2000` | 100 – 10,000 | Líon iomlán na gcéimeanna oiliúna. |
| `learning_rate` |  | number | no | `0.0002` | 0.000001 – 1 | Ráta foghlama optamaithe. |
| `number_of_frames` |  | integer | no | `89` | 9 – 121 | Líon frámaí gach sampla oiliúna. Caithfidh fuílleach 1 a bheith ann nuair a roinntear an líon ar 8; mar shampla 1, 9, 17, 25, 33, 41, 49, 57, 65, 73, 81, 89, 97. |
| `frame_rate` |  | integer | no | `24` | 8 – 60 | Spriocráta fráma físeáin na hoiliúna i bhfrámaí sa soicind. Is é 24 an ráta dúchasach do LTX-2.3. |
| `resolution` |  | enum (string) | no | `medium` | `low`, `medium`, `high` | Taifeach na hoiliúna. Méadaíonn méadú an taifigh riachtanais chuimhne. |
| `aspect_ratio` |  | enum (string) | no | `1:1` | `16:9`, `1:1`, `9:16` | Cóimheas gnéithe na hoiliúna. |
| `trigger_phrase` |  | string | no | `` |  | Frása gníomhachtaithe stíle LoRA, curtha isteach ag tús na bhfotheideal le linn na hoiliúna. |
| `auto_scale_input` |  | boolean | no | `false` |  | Coigeartú uathoibríoch físeáin chun an FPS agus líon frámaí iarrtha a mheaitseáil nuair a chumasaítear é; fanann tacair sonraí íomhánna gan athrú. |
| `split_input_into_scenes` |  | boolean | no | `false` |  | Rogha scoilteadh radharcanna, coinnithe múchta le haghaidh inpainting. Soláthair gearrthóga atá scartha cheana ionas nach gcuirfidh scoilteadh gach gearrthóg as sioncronú lena mhasc. |
| `split_input_duration_threshold` |  | number | no | `30` | 1 – 60 | Truicear scoilteadh radharcanna léirithe mar fhad i soicindí: ní scoiltear ach físeáin atá níos faide ná an tairseach. |
| `debug_dataset` |  | boolean | no | `false` |  | Mód iniúchta réamhphróiseála chun físeáin, íomhánna agus fotheidil a sheiceáil roimh rith iomlán oiliúna. Má chumasaítear é, cuireann an traenálaí an tacar sonraí oiliúna próiseáilte ar ais i gcartlann is féidir a íoslódáil lena athbhreithniú de láimh. |
| `validation` |  | array of object {prompt, video_url, mask_url} | no | `[]` | ≤ 2 items | Sonraí bailíochtaithe soláthraithe mar liosta; comhcheanglaíonn iontráil leid leis an bhfíseán foinse agus lena mhasc. |
| `validation[].prompt` |  | string | yes |  |  | Leid a úsáidtear le linn bailíochtaithe. |
| `validation[].video_url` |  | string (video URL) | yes |  | ≥ 1 characters | URL an fhíseáin foinse le haghaidh inpainting. |
| `validation[].mask_url` |  | string (image URL) | yes |  | ≥ 1 characters | Masc inpainting soláthraithe trí URL mar íomhá nó físeán, le hathrú méide uathoibríoch ionas go bhféadfadh a thaifeach a bheith éagsúil ó thaifeach an fhíseáin. Úsáideann an gnáthchoinbhinsiún dathanna dubh chun limistéar a chaomhnú gan athrú agus bán chun é a roghnú lena athghiniúint nó lena eagarthóireacht. |
| `validation_negative_prompt` |  | string | no | `blurry, out of focus, overexposed, underexposed, low contrast, washed out colors, excessive noise, grainy texture, poor lighting, flickering, motion blur, distorted proportions, unnatural skin tones, deformed facial features, asymmetrical face, missing facial features, extra limbs, disfigured hands, wrong hand count, artifacts around text, inconsistent perspective, camera shake, incorrect depth of field, background too sharp, background clutter, distracting reflections, harsh shadows, inconsistent lighting direction, color banding, cartoonish rendering, 3D CGI look, unrealistic materials, uncanny valley effect, incorrect ethnicity, wrong gender, exaggerated expressions, wrong gaze direction, mismatched lip sync, silent or muted audio, distorted voice, robotic voice, echo, background noise, off-sync audio, incorrect dialogue, added dialogue, repetitive speech, jittery movement, awkward pauses, incorrect timing, unnatural transitions, inconsistent framing, tilted camera, flat lighting, inconsistent tone, cinematic oversaturation, stylized filters, or AI artifacts.` |  | Leid dhiúltach a chuirtear i bhfeidhm le linn bailíochtaithe, a úsáideann próiseas réamhamhairc aonchéime. Toisc go ndéanann an próiseas sin tátal táirgthe driogtha dhá chéim a chomhfhogasú, bíonn a threoir agus a cháilíocht réamhamhairc éagsúil leis na torthaí deiridh. |
| `validation_number_of_frames` |  | integer | no | `89` | 9 – 121 | Líon frámaí gach físeáin bhailíochtaithe. |
| `validation_frame_rate` |  | integer | no | `24` | 8 – 60 | Spriocráta fráma na bhfíseán bailíochtaithe, i bhfrámaí sa soicind; ritheann LTX-2.3 go dúchasach ag 24. |
| `validation_resolution` |  | enum (string) | no | `high` | `low`, `medium`, `high` | Taifeach a úsáidtear le linn bailíochtaithe. |
| `validation_aspect_ratio` |  | enum (string) | no | `1:1` | `16:9`, `1:1`, `9:16` | Cóimheas gnéithe a úsáidtear le linn bailíochtaithe. |
| `stg_scale` |  | number | no | `1` | 0 – 3 | Scála Spatio-Temporal Guidance (STG), le 1.0 molta agus 0.0 ag casadh STG as. |

## Example input

Required parameters only:

```json
{
  "training_data_url": "https://example.com/your-file.zip"
}
```

A fuller example:

```json
{
  "training_data_url": "https://example.com/your-file.zip"
}
```

## 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/ltx23-trainer-v2/inpaint?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "training_data_url": "https://example.com/your-file.zip"
  }'

# 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/ltx23-trainer-v2/inpaint?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "training_data_url": "https://example.com/your-file.zip"
  }),
});
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 = {
    "training_data_url": "https://example.com/your-file.zip",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/ltx23-trainer-v2/inpaint", 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": "ltx23-trainer-v2/inpaint",
      "input": {
        "training_data_url": "https://example.com/your-file.zip"
      },
      "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": "ltx23-trainer-v2/inpaint",
  "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": 4800,
    "usd": "4.80",
    "charged": 4800,
    "refunded": 0
  },
  "input": {
    "training_data_url": "https://example.com/your-file.zip"
  },
  "output": {
    "video": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.jpeg",
      "content_type": "image/jpeg",
      "file_name": "0-output.jpeg",
      "file_size": 1843200
    },
    "audio": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.jpeg",
      "content_type": "image/jpeg",
      "file_name": "0-output.jpeg",
      "file_size": 1843200
    },
    "lora_file": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.jpeg",
      "content_type": "image/jpeg",
      "file_name": "0-output.jpeg",
      "file_size": 1843200
    },
    "config_file": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.jpeg",
      "content_type": "image/jpeg",
      "file_name": "0-output.jpeg",
      "file_size": 1843200
    },
    "debug_dataset": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.jpeg",
      "content_type": "image/jpeg",
      "file_name": "0-output.jpeg",
      "file_size": 1843200
    }
  },
  "outputs": [
    {
      "type": "file",
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.jpeg",
      "content_type": "image/jpeg",
      "file_size": 1843200,
      "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} \| null | Réamhamharc comhcheangailte físeáin ón mbailíochtú, nuair atá sé ar fáil do chríochphointí a tháirgeann físeán. |
| `audio` | object {url, content_type, file_name, file_size} \| null | Fuaim chomhcheangailte ón mbailíochtú, curtha ar fáil mar réamhamharc nuair atá sí ar fáil do na bealaí fuaime amháin seo: /audio-inpaint, /audio-extend-suffix, /audio-extend-prefix, /t2a, /a2a, agus /v2a. |
| `lora_file` | object {url, content_type, file_name, file_size} | URL do mheáchain LoRA oilte i bhformáid .safetensors. |
| `config_file` | object {url, content_type, file_name, file_size} | Cumraíocht le haghaidh socrú an chríochphointe tátail. |
| `debug_dataset` | object {url, content_type, file_name, file_size} \| null | Aschur dífhabhtaithe ar fáil nuair atá `debug_dataset` cumasaithe: cartlann is féidir a íoslódáil ina bhfuil na sonraí oiliúna tar éis na réamhphróiseála. |

## Related models

- [LTX 2.3 Trainer (V2) - Audio Inpainting](https://doitong.com/developers/models/ltx23-trainer-v2/audio-inpaint.md) (`ltx23-trainer-v2/audio-inpaint`): $0.0023 / step
- [LTX 2.3 Trainer (V2) - Audio+Video Reference IC-LoRA](https://doitong.com/developers/models/ltx23-trainer-v2/ic-lora/av2av.md) (`ltx23-trainer-v2/ic-lora/av2av`): $0.0068 / step
- [LTX 2.3 Trainer (V2) - Audio+Video Reference Transformation](https://doitong.com/developers/models/ltx23-trainer-v2/av2av.md) (`ltx23-trainer-v2/av2av`): $0.0068 / step
- [LTX 2.3 Trainer (V2) - Audio-to-Audio](https://doitong.com/developers/models/ltx23-trainer-v2/a2a.md) (`ltx23-trainer-v2/a2a`): $0.0023 / step
- [LTX 2.3 Trainer (V2) - Audio-to-Audio IC-LoRA](https://doitong.com/developers/models/ltx23-trainer-v2/ic-lora/a2a.md) (`ltx23-trainer-v2/ic-lora/a2a`): $0.0023 / step
- [LTX 2.3 Trainer (V2) - Audio-to-Video](https://doitong.com/developers/models/ltx23-trainer-v2/a2v.md) (`ltx23-trainer-v2/a2v`): $0.006 / step
- [LTX 2.3 Trainer (V2) - Backward Audio Extension](https://doitong.com/developers/models/ltx23-trainer-v2/audio-extend-suffix.md) (`ltx23-trainer-v2/audio-extend-suffix`): $0.0023 / step
- [LTX 2.3 Trainer (V2) - Backward Video Extension](https://doitong.com/developers/models/ltx23-trainer-v2/extend-suffix.md) (`ltx23-trainer-v2/extend-suffix`): $0.0061 / step

## Links

- HTML page: https://doitong.com/developers/models/ltx23-trainer-v2/inpaint
- 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=ltx23-trainer-v2/inpaint
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.com/v1/models/ltx23-trainer-v2/inpaint