# FLUX 3 Max Keyframes to Video API

> Huzalisha video kutoka kwa kidokezo na hadi picha 10 za fremu muhimu zilizowekwa kwenye nafasi za fremu, ikiwa na sauti ya hiari

Huunda video inayosogea kati ya fremu muhimu unazoweka kwenye muda. `keyframes` hupokea picha 1 hadi 10 zenye thamani za kipekee za `frame_index`, na `prompt` hueleza mwendo. `duration` ni kutoka sekunde 5 hadi 20, `resolution` ni 720p au 1080p, na `aspect_ratio` inajumuisha 21:9 hadi 9:16 au auto. `reasoning_level` (low au high) na `generate_audio` pia vinapatikana.

- Model id: `blackforestlabs/flux-3-max/keyframes-to-video`
- Made by: Black Forest Labs
- Category: Image to Video
- Output: video
- Price: from $0.0425 / second (5 s ≈ $0.213) (cheapest run $0.213 (213 API credits))
- Run: `POST https://api.doitong.ru/v1/run/blackforestlabs/flux-3-max/keyframes-to-video`
- Quote: `POST https://api.doitong.ru/v1/quote/blackforestlabs/flux-3-max/keyframes-to-video`
- Docs page: https://doitong.com/sw/developers/models/blackforestlabs/flux-3-max/keyframes-to-video

## Pricing

Price: **from $0.0425 / second (5 s ≈ $0.213)** (the lowest tier; the quote prices your exact input). Billed per second of output (`duration`, default 20).

Price rules (the first rule that matches the input wins; a parameter you leave out counts as its default):

- When `resolution` = 1080p: $0.0725 (72.5 API credits) / second

The full example input below costs $0.425 = 425 API credits (5 s × 85 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.ru/v1/quote/blackforestlabs/flux-3-max/keyframes-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

| Parameter | Canonical name | Type | Required | Default | Allowed values / range | Description |
|---|---|---|---|---|---|---|
| `prompt` |  | string | yes |  | ≥ 1 characters | Maandishi yanayoeleza mwendo wa video kati ya keyframe. |
| `keyframes` |  | array of object {image_url, frame_index} | yes |  | 1 – 10 items | Picha za keyframe zilizowekwa kwenye video ya tokeo kulingana na `frame_index`; toa zisizozidi 10, bila kurudia faharasa. |
| `keyframes[].image_url` |  | string (image URL) | yes |  |  | URL ya picha ya keyframe; inakubali PNG, JPEG au WebP. |
| `keyframes[].frame_index` |  | integer | yes |  | ≥ 0 | Uwekaji wa keyframe hutumia faharasa tofauti ya fremu kwa kila keyframe, yenye kikomo cha juu cha `duration * 24`; tokeo huendeshwa kwa 24 fps. |
| `duration` |  | enum (integer) | no | `5` | `5`, `6`, `7`, `8`, `9`, `10`, `11`, `12`, `13`, `14`, `15`, `16`, `17`, `18`, `19`, `20` | Urefu wa video ya tokeo, uliopimwa kwa sekunde. |
| `resolution` |  | enum (string) | no | `720p` | `720p`, `1080p` | Mwonekano wa video ya tokeo. |
| `reasoning_level` |  | enum (string) | no | `high` | `low`, `high` | Juhudi za reasoning hudhibiti usawa kati ya kasi ya uzalishaji na kazi ambayo harness hutumia kuelewa kidokezo: juhudi zaidi huchukua muda mrefu. |
| `aspect_ratio` |  | enum (string) | no | `auto` | `auto`, `21:9`, `2:1`, `16:9`, `4:3`, `1:1`, `3:4`, `9:16` | Uwiano wa pande wa video iliyozalishwa, ambapo `auto` hulinganisha picha ya kwanza isipokuwa ingizo ni kidokezo cha maandishi, ambapo huchagua 16:9. |
| `generate_audio` |  | boolean | no | `true` |  | Hudhibiti ikiwa video itajumuisha sauti iliyozalishwa. |
| `seed` |  | integer \| null | no |  |  | Seed ya uzalishaji; thamani nasibu hutumika isipojumuishwa. |

## 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.ru/v1/run/blackforestlabs/flux-3-max/keyframes-to-video?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.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/blackforestlabs/flux-3-max/keyframes-to-video?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.ru/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-max/keyframes-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": "blackforestlabs/flux-3-max/keyframes-to-video",
      "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-max/keyframes-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": 425,
    "usd": "0.425",
    "charged": 425,
    "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,
      "width": 1024,
      "height": 768,
      "fps": 1.0,
      "duration": 5,
      "num_frames": 1
    },
    "seed": 42,
    "timings": {}
  },
  "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 |
|---|---|---|
| `video` | object {url, content_type, file_name, file_size, width, height, fps, duration, num_frames} | Video iliyozalishwa na modeli. |
| `seed` | integer | Thamani ya seed iliyotumika wakati wa uzalishaji. |
| `timings` | object | Data ya muda iliyoondolewa upanuzi wa kidokezo, decoding na upakiaji kutoka `inference`, ambayo hupima tu uondoaji wa kelele wa video na modeli kwa sekunde. |

## Related models

- [FLUX 3 Max Text to Video](https://doitong.com/developers/models/blackforestlabs/flux-3-max/text-to-video.md) (`blackforestlabs/flux-3-max/text-to-video`): from $0.0425 / second of output video
- [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
- [LTX 2.5 Pro Image to Video](https://doitong.com/developers/models/lightricks/ltx-2.5/image-to-video/pro.md) (`lightricks/ltx-2.5/image-to-video/pro`): from $0.12 / second
- [MiniMax H3 Image to Video](https://doitong.com/developers/models/minimax/h3/image-to-video.md) (`minimax/h3/image-to-video`): from $0.05 / second
- [Seedance 2.0 Fast Image to Video](https://doitong.com/developers/models/bytedance/seedance-2.0/fast/image-to-video.md) (`bytedance/seedance-2.0/fast/image-to-video`): from $0.113 / second
- [Seedance 2.0 Image to Video](https://doitong.com/developers/models/bytedance/seedance-2.0/image-to-video.md) (`bytedance/seedance-2.0/image-to-video`): from $0.141 / second

## Links

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