# Flux 3 Keyframes To Video Draft API

> ویدئوی پیش‌نویس مبتنی بر حداکثر ده تصویر فریم کلیدی متصل به موقعیت‌های مشخص

یک `prompt` و 1 تا 10 `keyframes` ارائه کنید که هرکدام `frame_index` یکتا دارند. برای اعتبارسنجی موقعیت فریم‌های کلیدی، `duration` صریحاً از 5 تا 20 ثانیه لازم است. `aspect_ratio` می‌تواند auto یا از 21:9 تا 9:16 باشد و `generate_audio` صدا را فعال یا غیرفعال می‌کند. خروجی شامل `draft_cache` برای رندر با کیفیت کامل است.

- Model id: `blackforestlabs/flux-3/keyframes-to-video/draft`
- Made by: Black Forest Labs
- Category: Image to Video
- Output: video
- Price: $0.06 / second (5 s ≈ $0.30) (cheapest run $0.30 (300 API credits))
- Run: `POST https://api.doitong.com/v1/run/blackforestlabs/flux-3/keyframes-to-video/draft`
- Quote: `POST https://api.doitong.com/v1/quote/blackforestlabs/flux-3/keyframes-to-video/draft`
- Docs page: https://doitong.com/fa/developers/models/blackforestlabs/flux-3/keyframes-to-video/draft

## Pricing

Price: **$0.06 / second (5 s ≈ $0.30)**. Billed per second of output (`duration`, default 20).

The full example input below costs $0.30 = 300 API credits (5 s × 60 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/blackforestlabs/flux-3/keyframes-to-video/draft` 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 |
|---|---|---|---|---|---|---|
| `prompt` |  | string | yes |  |  | توصیف متنی ویدیوی پیش‌نویس. |
| `aspect_ratio` |  | enum (string) | no | `auto` | `auto`, `21:9`, `2:1`, `16:9`, `4:3`, `1:1`, `3:4`, `9:16` | نسبت تصویر خروجی پیش‌نویس؛ `auto` انتخاب را به مدل واگذار می‌کند. |
| `duration` |  | enum (integer) | no | `5` | `5`, `6`, `7`, `8`, `9`, `10`, `11`, `12`, `13`, `14`, `15`, `16`, `17`, `18`, `19`, `20` | طول پیش‌نویس برای اعتبارسنجی موقعیت‌های فریم‌های کلیدی؛ مقدار صحیح صریح بین 5 و 20 لازم است. |
| `generate_audio` |  | boolean | no | `true` |  | تولید صوت برای ویدیوی پیش‌نویس را کنترل می‌کند. |
| `safety_tolerance` |  | integer | no | `2` | 0 – 4 | تحمل ایمنی ویدیو از مقیاسی استفاده می‌کند که پذیرفته‌ترین تنظیم آن 4 و سخت‌گیرانه‌ترین آن 0 است. |
| `keyframes` |  | array of object {image_url, frame_index} | yes |  | 1 – 10 items | مجموعه‌ای شامل حداکثر 10 تصویر که هرکدام `frame_index` متفاوتی برای تعیین موقعیت خود در پیش‌نویس تولیدشده دارند. |
| `keyframes[].image_url` |  | string (image URL) | yes |  |  | URL تصویر فریم کلیدی؛ PNG، JPEG یا WebP را می‌پذیرد. |
| `keyframes[].frame_index` |  | integer | yes |  | ≥ 0 | جای‌گذاری فریم‌های کلیدی برای هر فریم کلیدی از یک اندیس متمایز استفاده می‌کند که سقف آن `duration * 24` است؛ خروجی با 24 fps اجرا می‌شود. |

## Example input

Required parameters only:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
  "keyframes": [
    {
      "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
      "frame_index": 0
    }
  ]
}
```

A fuller example:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
  "keyframes": [
    {
      "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
      "frame_index": 0
    }
  ]
}
```

## 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/blackforestlabs/flux-3/keyframes-to-video/draft?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",
    "keyframes": [
      {
        "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
        "frame_index": 0
      }
    ]
  }'

# 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/blackforestlabs/flux-3/keyframes-to-video/draft?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",
    "keyframes": [
      {
        "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
        "frame_index": 0
      }
    ]
  }),
});
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",
    "keyframes": [
        {
            "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
            "frame_index": 0,
        },
    ],
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/blackforestlabs/flux-3/keyframes-to-video/draft", 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": "blackforestlabs/flux-3/keyframes-to-video/draft",
      "input": {
        "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
        "keyframes": [
          {
            "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
            "frame_index": 0
          }
        ]
      },
      "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": "blackforestlabs/flux-3/keyframes-to-video/draft",
  "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": 300,
    "usd": "0.30",
    "charged": 300,
    "refunded": 0
  },
  "input": {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "keyframes": [
      {
        "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
        "frame_index": 0
      }
    ]
  },
  "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
    },
    "draft_cache": {
      "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.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} | ویدیوی تولیدشده به‌صورت پیش‌نویس. |
| `draft_cache` | object {url, content_type, file_name, file_size} \| null | داده کش برای رندر پیش‌نویس با کیفیت کامل از طریق `draft-enhance` که در بسته‌ای پایدار و رمزگذاری‌شده ذخیره می‌شود. اگر شریک برای پیش‌نویس هیچ بسته‌ای برنگرداند، این خروجی وجود ندارد. |

## Related models

- [Flux 3 Text To Video Draft](https://doitong.com/developers/models/blackforestlabs/flux-3/text-to-video/draft.md) (`blackforestlabs/flux-3/text-to-video/draft`): $0.06 / second
- [Flux 3 First Last Frame to Video Draft](https://doitong.com/developers/models/blackforestlabs/flux-3/first-last-frame-to-video/draft.md) (`blackforestlabs/flux-3/first-last-frame-to-video/draft`): $0.06 / second
- [Flux 3 Image To Video Draft](https://doitong.com/developers/models/blackforestlabs/flux-3/image-to-video/draft.md) (`blackforestlabs/flux-3/image-to-video/draft`): $0.06 / second
- [Flux 3 Draft Enhance](https://doitong.com/developers/models/blackforestlabs/flux-3/draft-enhance.md) (`blackforestlabs/flux-3/draft-enhance`): $3.48 / run
- [Flux 3 Extend Video Draft](https://doitong.com/developers/models/blackforestlabs/flux-3/extend-video/draft.md) (`blackforestlabs/flux-3/extend-video/draft`): $0.12 / second
- [FLUX 3 Max Image to Video](https://doitong.com/developers/models/blackforestlabs/flux-3-max/image-to-video.md) (`blackforestlabs/flux-3-max/image-to-video`): from $0.0425 / second of output video
- [Grok Imagine Video 1.5 Image to Video](https://doitong.com/developers/models/xai/grok-imagine-video/v1.5/image-to-video.md) (`xai/grok-imagine-video/v1.5/image-to-video`): from $0.082 / second
- [Kling 3.0 Pro Image to Video](https://doitong.com/developers/models/kling-video/v3/pro/image-to-video.md) (`kling-video/v3/pro/image-to-video`): from $0.112 / second

## Links

- HTML page: https://doitong.com/developers/models/blackforestlabs/flux-3/keyframes-to-video/draft
- 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=blackforestlabs/flux-3/keyframes-to-video/draft
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.com/v1/models/blackforestlabs/flux-3/keyframes-to-video/draft