# Ltx 2.3 Quality · HDR API

> הייבט אַן SDR ווידעאָ אויף HDR און גיט צוריק אַן 16-bit EXR־פרעימס־אַרכיוו מיט אַן MP4־פּריוויו

קאָנווערטירט אַ ווידעאָ מיט נאָרמאַלער דינאַמישער ראַנזש פֿון `video_url` אין HDR, לויט אַ נייטיקן `prompt`. די רעזולטאַטן קומען ווי אַ ZIP מיט 16-bit EXR־פרעימס (`exr_frames_url`) פּלוס אַן MP4 `preview_video` פֿאַר שנעלן קאָנטראָל. די דזשענערירונג גייט ביז בערך 720p, מיט דער קירצער זייט באַגרענעצט צו 704 px. `num_frames` גייט פֿון 9 ביז 481.

- Model id: `ltx-2.3-quality/hdr`
- Made by: Lightricks
- Category: Video to Video
- Output: json
- 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/hdr`
- Quote: `POST https://api.doitong.com/v1/quote/ltx-2.3-quality/hdr`
- Docs page: https://doitong.com/yi/developers/models/ltx-2.3-quality/hdr

## 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 $0.29 = 290 API credits (107 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/hdr` 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 |  |  | פּראָמפּט וואָס ווערט גענוצט צו דיריגירן די גענערירונג. |
| `video_url` | `video` | string (video URL) | yes |  |  | SDR־מקור־ווידעא פֿאַר קאָנווערטירן צו HDR דורך ווידעא־קאַנדיציאָנירונג. |
| `num_frames` |  | integer | no | `121` | 9 – 481 | ראַם־צאָל פונעם גענערירטן רעזולטאַט. |
| `resolution` |  | object {width, height} \| enum (string) | no | `auto` | `auto`, `square_hd`, `square`, `portrait_4_3`, `portrait_16_9`, `landscape_4_3`, `landscape_16_9` | געבעטע ווידעא־דימענסיעס; צו גרויסע בקשות ווערן פּראָפּאָרציאָנאַל רעדוצירט צו האַלטן דעם אַספּעקט־ראַטיאָ. גענערירונג גייט ביז בערך 720p, מיט אַ 704px־קאַפּ אויף דער קורצער זײַט. |
| `frames_per_second` |  | number | no | `24` | 1 – 60 | רעזולטאַט־ווידעא־ראַם־קורס, געמאסטן אין ראַמען פּער סעקונדע. |
| `num_inference_steps` |  | integer | no | `15` | 8 – 30 | שטעלט וויפֿל inference־שריט צו לויפֿן, ביז 30; אויב מען ענדערט עס נישט, ווערן גענוצט 15. |
| `guidance_scale` |  | number | no | `1` | 1 – 20 | פּאַסט classifier-free guidance מיט דעם מאָסשטאַב; זײַן סטאַנדאַרט־טונירונג צילט אויף סײַ הויך קוואַליטעט סײַ שנעלע גענערירונג. |
| `generate_audio` |  | boolean | no | `true` |  | אַודיאָ־טראַק־באַשטימונג פֿאַר דעם צוריקגעגעבן MP4: אויסגעלאָשן פּראָדוצירט אַ ווידעא־בלויז פֿײַל, און אָנגעצונדן נעמט אַרײַן אַודיאָ. |
| `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` |  | נעגאַטיווער פּראָמפּט וואָס ספּעציפֿיצירט וואָס די גענערירונג זאָל אויסמײַדן. |
| `seed` |  | integer \| null | no |  |  | סיד וואָס מאכט גענערירונג רעפּראָדוצירבאַר. אויב מען שטעלט עס אויף None, ווערט אַ סיד ראַנדאָם אויסגעקליבן. |
| `enable_prompt_expansion` |  | boolean | no | `true` |  | קאָנטראָלירט צי פּראָמפּט־יקספּאַנשאַן איז אַקטיווירט. |
| `enable_safety_checker` |  | boolean | no | `true` |  | קאָנטראָלירט צי זיכערהייט־קאָנטראָל זאָל זײַן אַקטיוו. |
| `video_quality` |  | enum (string) | no | `high` | `low`, `medium`, `high`, `maximum` | קוואַליטעט־פּריסעט וואָס ווערט געווענדט צום רעזולטאַט־ווידעא. |
| `video_write_mode` |  | enum (string) | no | `balanced` | `fast`, `balanced`, `small` | שרײַב־מאָדע פֿאַרן רעזולטירנדיקן ווידעא. |

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
{
  "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
{
  "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/hdr?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "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/hdr?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "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 = {
    "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/hdr", 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/hdr",
      "input": {
        "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/hdr",
  "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": 290,
    "usd": "0.29",
    "charged": 290,
    "refunded": 0
  },
  "input": {
    "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": {
    "preview_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,
      "width": 1024,
      "height": 768,
      "fps": 1.0,
      "duration": 5,
      "num_frames": 1
    },
    "exr_frames_url": {
      "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
    },
    "seed": 42,
    "prompt": "string"
  },
  "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 |
|---|---|---|
| `preview_video` | object {url, content_type, file_name, file_size, width, height, fps, duration, num_frames} | MP4־ווערסיע פֿאַר שנעלן איבערקוקן פֿונעם HDR־רעזולטאַט. |
| `exr_frames_url` | object {url, content_type, file_name, file_size} | ZIP פֿײַל מיט אַ באַזונדערן 16-bit EXR בילד פֿאַר יעדן גענערירטן ראַם. |
| `seed` | integer | דער בפֿועל־Seed וואָס ווערט געווענדט בעת גענערירונג. |
| `prompt` | string | גענערירונג־פּראָמפּט, אַרײַנגערעכנט יעדע פֿאַרברייטערונג וואָס איז געווענדט געוואָרן איידערן נוצן. |

## 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/hdr
- 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/hdr
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.com/v1/models/ltx-2.3-quality/hdr