# Mirelo SFX2.0 · Video to Video API

> ᡳᠯᡤᠠᠨ ᠵᡠᠯᡤᡝᠨ ᡩᡝ ᠰᡳᠨᡝ ᠵᡠᠯᡤᡝᠨ ᠵᠠᡥᠠᠨ ᠪᡝ ᠨᡝᠮᡝ᠂ ᠰᡳᠨᡝ ᠵᡠᠯᡤᡝᠨ ᠵᠠᠯᠠᠨ ᠪᠠ ᠵᡠᠸᠠᠨ ᠪᡝ ᡳᠯᡤᠠᠨᠠᠮᡝ ᠪᠠᡳᠨᠠ᠂ ᠵᡠᠯᡤᡝᠨ ᠵᠠᡥᠠᠨ ᠴᡳ ᠵᡠᠯᡤᡝᠯᡝᠮᡝ

`video_url` ᡳ ᠵᡠᠯᡤᡝᠨ ᠪᡝ ᡩᡠᠯᡠᠮᡝ ᡠᠯᡥᡳᠮᡝ ᠵᠠᡥᠠᠨ ᠪᡝ ᠰᡳᠯᡤᠠᠨᠠᠮᡝ᠂ ᠰᡳᠨᡝ ᠵᡠᠯᡤᡝᠨ ᠪᡝ ᠵᡠᠸᠠᠨ ᠴᡳ ᠵᠠᠯᠠᠨ᠉ `text_prompt` 2000 ᡤᡝᠰᡝ ᡩᡝ ᠠᡳᠰᡳᠯᠠᠮᡝ ᠰᡳᠯᡤᠠᠨ ᠪᡝ ᠵᡠᠯᡤᡝᠯᡝᠮᡝ᠂ `negative_prompt` ᠴᡳ ᠵᡠᠯᡤᡝᠨ ᠪᡝ ᠪᡳᠰᡳᡵᡝᠮᡝ᠉ `preserve_speech` ᠴᡳ ᠪᡳ ᠠᠮᠠᠯᠠᠩᡤᠠᠨ ᠪᡝ ᠰᠠᡵᡤᠠᠮᡝ᠂ `duration` 1 ᡩᡝᠨ 600 ᡩᡝᠨ᠂ `num_samples` 1 ᡩᡝᠨ 4 ᠮᡠᠰᡝ ᠪᡝ ᡳᠯᡤᠠᠨᠠᠮᡝ᠉ `seed` ᠴᡳ ᡝᠮᡠ ᡝᠯᡤᡝᠮᡝ ᠰᡳᠯᡤᠠᠨᠠᠮᡝ ᠵᡠᠸᠠᠨ ᠵᠠᠯᠠᠨ ᠪᡝ ᠪᠠᠨᠵᡳᠮᡝ ᠵᠠᡥᠠᠨ᠉

- Model id: `mirelo-ai/sfx2.0/video-to-video`
- Made by: Mirelo AI
- Category: Video to Video
- Output: video
- Price per second of your output audio: $0.01 / second of output audio (cheapest run $0.01 (10 API credits))
- Run: `POST https://api.doitong.ru/v1/run/mirelo-ai/sfx2.0/video-to-video`
- Quote: `POST https://api.doitong.ru/v1/quote/mirelo-ai/sfx2.0/video-to-video`
- Docs page: https://doitong.com/mnc/developers/models/mirelo-ai/sfx2.0/video-to-video

## Pricing

Price: **$0.01 / second of output audio**. Price per second of your output 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 $0.20 = 200 API credits (20 s output audio × $0.01).

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/mirelo-ai/sfx2.0/video-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 |
|---|---|---|---|---|---|---|
| `video_url` | `video` | string (video URL) | yes |  |  | ᠵᠠᠯᠠᡵᠠ ᠰᡠᠨᡤᠠ ᡳ URL᠉ |
| `text_prompt` |  | string \| null | no |  | ≤ 2000 characters | ᠵᡠᠯᡝᠮᡝ ᡠᠯᠠᡵᠠ ᡥᡡᠯᠠᠨ，ᠪᡠᠶᡝᠮᡝ ᠪᡝ ᠵᠠᠯᠠᠮᠪᡳ᠉ |
| `negative_prompt` |  | string \| null | no |  | ≤ 1000 characters | ᠵᡠᠯᡤᡝᡵᡝᠨ ᡩᡝ ᡤᡳᠰᡠᠨ ᡳ ᡠᠯᡥᡝᠨ ᠵᡠᡰᡝ ᠪᡝ ᡩᠣᠰᡳᠮᠪᡳ᠉ |
| `preserve_speech` |  | boolean | no | `true` |  | ᠪᡠᠶᡝᠮᡝ ᠮᡠᡰᡝᠨ ᡳ ᡤᡳᠰᡠᠨ ᡳ ᡠᠰᡳᡥᠠ: false ᡤᡳᠰᡠᠨ ᡝᠮᡠ ᠠᡶᠠᡥᠠ ᠪᡝ ᠵᡠᠯᡝᠮᡝ ᠠᠰᡠᡥᠠ ᠵᡠᠯᡝ ᡩᡝ ᠮᡠᡰᡝᠨ ᡳ ᠵᠠᠯᠠᠨ ᠪᡝ ᠪᡠᠶᡝᠮᡝᠮᠪᡳ᠉ ᠰᡠᡵᡝᡩᡝ ᡝᡵᡝᠮᡝ ᠪᡠᠮᡝᠨ ᡳ ᡤᡳᠰᡠᠨ ᡝᠮᡠ ᠠᠮᠠᠰᡳ ᠪᠠᠶᠠᠨ ᡩᡝ ᠪᡝᠶᡝ ᠪᠠᡳᠮᠪᡳ᠉ |
| `duration` |  | number | no | `10` | 1 – 600 | ᡶᡳᠯᡝ ᡳ ᡩᡝᠪᡝ ᠰᡝᡴᡠᠨᡩ ᡩᡝ ᡤᡝᠪᡠᠮᡝ ᠠᠰᡳᠮᠪᡳ; 1 s ᡳ ᡠᠯᡥᡝᠨ ᡩᡝ 400 ᠪᡝ ᡩᠠᡳᠯᠠᡵᠠᡴᡡ᠉ ᡠᠯᡥᡝᠨ 1 s ᡩᡝ ᡳᠨᡠ ᠪᡳᠮᠪᡳ᠂ ᡶᡳᠯᡝ ᡳ ᡩᡝᠪᡝ ᠰᡝᡴᡠᠨᡩ 10 s ᡩᡝ ᠨᡠᠩᡤᡳ ᠪᡠᠶᡝᠮᡝᠮᠪᡳ᠉ |
| `num_samples` |  | integer | no | `2` | 1 – 4 | ᠪᡠᠶᡝᠮᡝᠮᡝ ᠵᡠᠰᡠ ᡳ ᠵᡠᠯᡝᠨ᠉ |
| `seed` |  | integer \| null | no |  | -1 – 18,446,744,073,709,552,000 | ᠪᡠᠶᡝᠮᡝᠮᡝ ᠮᡝᡳᠰᡝᠨ; -1 ᠪᡝ None ᡩᡠᠯᡝᠮᡝ ᠠᠮᠠᠰᡳ ᠰᡠᠨᠵᠠᠮᠪᡳ᠉ |

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
{
  "video": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
}
```

A fuller example:

```json
{
  "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.ru/v1/run/mirelo-ai/sfx2.0/video-to-video?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "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.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/mirelo-ai/sfx2.0/video-to-video?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "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.ru/v1"
headers = {"Authorization": "Bearer " + os.environ["DOITONG_API_KEY"]}

payload = {
    "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/mirelo-ai/sfx2.0/video-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": "mirelo-ai/sfx2.0/video-to-video",
      "input": {
        "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": "mirelo-ai/sfx2.0/video-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": 200,
    "usd": "0.20",
    "charged": 200,
    "refunded": 0
  },
  "input": {
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
  },
  "output": {
    "model": "sfx-2.0",
    "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 |
|---|---|---|
| `model` | string | ᠪᡠᠶᡝᠮᡝ ᡠᠯᠠᡥᠠᠩᡤᠠᠨ SFX ᠮᠣᠳᡝᠯ ᡳ ᡶᠣᠮᠠᠨ᠉ |
| `video` | array of object {url, content_type, file_name, file_size} | ᡝᡵᡝᠮᡝ ᠪᡠᠮᡝᠨ ᡳ ᠰᡠᠨᡤᠠ ᡝᠮᡠ ᡝᠮᡠ ᠪᡠᠶᡝᠮᡝ ᡤᡳᠰᡠᠨ ᡩᡝ ᠵᠠᠯᡳᠨᠠᠮᠪᡳ᠉ |

## Related models

- [Mirelo SFX2.0 · Text to Audio](https://doitong.com/developers/models/mirelo-ai/sfx2.0/text-to-audio.md) (`mirelo-ai/sfx2.0/text-to-audio`): $0.01 / second of output audio
- [Mirelo SFX2.0 · Video to Audio](https://doitong.com/developers/models/mirelo-ai/sfx2.0/video-to-audio.md) (`mirelo-ai/sfx2.0/video-to-audio`): $0.01 / second of output audio
- [AMT Interpolation](https://doitong.com/developers/models/amt-interpolation.md) (`amt-interpolation`): $0.000575 / second of processing time
- [AnimateDiff Turbo · Video to Video](https://doitong.com/developers/models/fast-animatediff/turbo/video-to-video.md) (`fast-animatediff/turbo/video-to-video`): $0.00125 / second of processing time
- [AnimateDiff · Video to Video](https://doitong.com/developers/models/fast-animatediff/video-to-video.md) (`fast-animatediff/video-to-video`): $0.00125 / second of processing time
- [Auto-Captioner](https://doitong.com/developers/models/auto-caption.md) (`auto-caption`): $0.10 / video
- [Bernini-R Edit Video](https://doitong.com/developers/models/bernini-r/edit-video.md) (`bernini-r/edit-video`): from $0.04 / second of output video
- [Bernini-R Reference Edit Video](https://doitong.com/developers/models/bernini-r/reference-edit-video.md) (`bernini-r/reference-edit-video`): from $0.04 / second of output video

## Links

- HTML page: https://doitong.com/developers/models/mirelo-ai/sfx2.0/video-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=mirelo-ai/sfx2.0/video-to-video
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.ru/v1/models/mirelo-ai/sfx2.0/video-to-video