# LTX 2.3 Trainer (V2) - Audio-to-Video API

> Traenálann sé LoRA LTX 2.3 a chruthaíonn físeán ó íomhá thosaigh agus fuaim riochtaithe

Traenálann sé LoRA le haghaidh giniúint fuaim-go-físeán ó `.zip` in `training_data_url`. Is é `rank` 8 go 128, `number_of_steps` 100 go 10000, agus `number_of_frames` 9 go 121. Glacann `validation` le suas le 2 iontráil, agus rianta fuaime riochtaithe i ngach ceann acu. Aschuirtear meáchain LoRA, comhad cumraíochta agus réamhamharc roghnach.

- Model id: `ltx23-trainer-v2/a2v`
- Made by: Lightricks
- Category: Training
- Output: file
- Price: $0.006 / step (cheapest run $12.00 (12000 API credits))
- Run: `POST https://api.doitong.com/v1/run/ltx23-trainer-v2/a2v`
- Quote: `POST https://api.doitong.com/v1/quote/ltx23-trainer-v2/a2v`
- Docs page: https://doitong.com/ga/developers/models/ltx23-trainer-v2/a2v

## Pricing

Price: **$0.006 / step**. Billed per training step (`number_of_steps`).

The full example input below costs $12.00 = 12000 API credits (2000 steps × 6 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/a2v` 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` |  | Scoilteadh radharcanna d’fhíseáin oiliúna sintéisithe a sháraíonn an tairseach faid. Nuair atá sé true, tarlaíonn an scoilteadh tar éis íomhá tosaigh agus fuaim a chur le chéile. |
| `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. |
| `audio_normalize` |  | boolean | no | `true` |  | Normalú buaicphointe fuaime coinníollaithe chun leibhéil chomhsheasmhacha a choinneáil ar fud an tacair sonraí. |
| `audio_preserve_pitch` |  | boolean | no | `true` |  | Caomhnú tuinairde agus an fhuaim á coigeartú chun fad an fhíseáin a mheaitseáil, seachas í a bhearradh nó a stuáil. |
| `validation` |  | array of object {prompt, image_url, audio_url} | no | `[]` | ≤ 2 items | Liosta leideanna bailíochtaithe a phéireálann gach leid le rian fuaime coinníollaithe. |
| `validation[].prompt` |  | string | yes |  |  | Leid a úsáidtear le linn bailíochtaithe. |
| `validation[].image_url` |  | string (image URL) | yes |  | ≥ 1 characters | URL íomhá a úsáideann a2v go díreach mar a chéad fhráma, seachas an fráma sin a ghiniúint. Úsáideann próiseas íomhá+fuaim -> físeán a2v an fhuaim soláthraithe agus an íomhá seo araon mar choinníollú. |
| `validation[].audio_url` |  | string (audio URL) | yes |  | ≥ 1 characters | URL fuaime coinníollaithe a úsáidtear chun giniúint físeáin a thiomáint. |
| `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/a2v?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/a2v?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/a2v", 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/a2v",
      "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/a2v",
  "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": 12000,
    "usd": "12.00",
    "charged": 12000,
    "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) - 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
- [LTX 2.3 Trainer (V2) - Forward Audio Extension](https://doitong.com/developers/models/ltx23-trainer-v2/audio-extend-prefix.md) (`ltx23-trainer-v2/audio-extend-prefix`): $0.0022 / step

## Links

- HTML page: https://doitong.com/developers/models/ltx23-trainer-v2/a2v
- 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/a2v
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.com/v1/models/ltx23-trainer-v2/a2v