# Kling 2.6 Motion Control

> Affordable motion transfer: the character from a photo copies the motion from a video. 3–30 second clips, 720p or 1080p.

Kling 2.6 Motion Control takes one character photo and a motion video: the character repeats the motion, gestures and expressions from the clip.

Orientation «Like the video» — video 3–30 seconds, «Like the photo» — 3–10 seconds. Longer is trimmed. The clip's sound can be kept. Quality Standard (720p) or Pro (1080p). You pay per second of your video.

One model, `kling-2.6-motion-control` · ~5 min. Send your video `video_url` and photos `image_urls`.




## Price

| Resolution | Price per second of your video |
|---|---|
| 720p | $0.075 |
| 1080p | $0.119 |

- Price = per-second price × clip length, rounded up to $0.001. Charged when the task is created and fully refunded if it fails.
- `character_orientation: "image"` — video up to 10 s (longer is trimmed to 10).
- You pay per second of your video (3 to 30 s). A clip longer than 30 s is trimmed to 30; the result has the same length. `prompt` may be omitted.

## Media limits

| Type | Limits |
|---|---|
| Images | **1** (character); JPG / PNG / WebP; public https link or [files/upload](https://docs.mixmedia.tech/en/endpoints/upload) — up to **30 MB** per file |
| Video | one clip, `video_url`; **3 s** to **30 s** (longer is trimmed to 30); MP4 / MOV → MP4 on the server; upload ≤ **200 MB** |

Photos — public https or upload; video and audio — files/upload only.


## Parameters (field `input`)

| Parameter | Description | Values (default in bold) |
|---|---|---|
| `prompt` | What happens in the clip: scene, motion, camera, light, style | text, up to 2500 chars (optional, default empty) |
| `video_url` | Motion video (MP4): one clip, 3–30 s with `character_orientation: "video"`, 3–10 s with `"image"` (longer is trimmed). Upload it via files/upload first | `"https://…"` |
| `image_urls` | Character photos (https): look, face, clothes | `["https://…"]`, 1–1 |
| `character_orientation` | `video` — pose and turns follow the video (clip up to 30 s), `image` — the angle follows the photo (clip up to 10 s) | **`video`** `image` |
| `resolution` | Quality = the Kling mode: `720p` — Standard (std), `1080p` — Pro (pro). You can also send `mode`: `std` / `pro` | **`720p`** · `1080p` |
| `keep_original_sound` | Keep the sound of your video in the result | `true` `false` (default `true`) |

## Examples

### Video + photo

```bash
curl -X POST https://mixmedia.tech/api/v1/jobs/createTask \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"kling-2.6-motion-control","input":{"prompt":"The character from the photo repeats the dance from the video","video_url":"https://mixmedia.tech/files/<id>.mp4","image_urls":["https://mixmedia.tech/static/img/previews/gpt-t2i.jpg"],"character_orientation":"video","resolution":"720p","keep_original_sound":true}}'
```

```python
import os, requests

r = requests.post(
    "https://mixmedia.tech/api/v1/jobs/createTask",
    headers={"Authorization": f"Bearer {os.environ['API_KEY']}"},
    json={
      "model": "kling-2.6-motion-control",
      "input": {
        "prompt": "The character from the photo repeats the dance from the video",
        "video_url": "https://mixmedia.tech/files/<id>.mp4",
        "image_urls": [
          "https://mixmedia.tech/static/img/previews/gpt-t2i.jpg"
        ],
        "character_orientation": "video",
        "resolution": "720p",
        "keep_original_sound": True
      }
    },
)
print(r.json())  # {"code": 200, "data": {"taskId": "..."}}
```

```javascript
const r = await fetch("https://mixmedia.tech/api/v1/jobs/createTask", {
  method: "POST",
  headers: { Authorization: `Bearer ${process.env.API_KEY}`, "Content-Type": "application/json" },
  body: JSON.stringify({
    "model": "kling-2.6-motion-control",
    "input": {
      "prompt": "The character from the photo repeats the dance from the video",
      "video_url": "https://mixmedia.tech/files/<id>.mp4",
      "image_urls": [
        "https://mixmedia.tech/static/img/previews/gpt-t2i.jpg"
      ],
      "character_orientation": "video",
      "resolution": "720p",
      "keep_original_sound": true
    }
  }),
});
console.log(await r.json()); // { code: 200, data: { taskId: "..." } }
```

## Create and result

1. `POST /api/v1/jobs/createTask` with `model` and `input`.
2. Poll `GET /api/v1/jobs/recordInfo?taskId=…` every 3–5 s (or a [callback](https://docs.mixmedia.tech/en/callbacks)).

### Successful createTask (HTTP 200)

```json
{
  "code": 200,
  "msg": "success",
  "data": {
    "taskId": "task_...",
    "task_id": "task_...",
    "status": "submitted"
  }
}
```

### Completed task (recordInfo)

```json
{
  "code": 200,
  "msg": "success",
  "data": {
    "taskId": "task_...",
    "task_id": "task_...",
    "state": "success",
    "status": "completed",
    "costUsd": "0.384",
    "refunded": false,
    "resultJson": {
      "videos": [
        {
          "url": "https://…/out.mp4"
        }
      ],
      "duration": 8
    }
  }
}
```

Aliases: `task_id` = `taskId`; `status`: `pending` / `processing` / `completed` / `failed` alongside `state`. Clip URL is in `resultJson`. `size` is an alias of `aspect_ratio` in `input`.


Photos can be any public https links or uploads via [files/upload](https://docs.mixmedia.tech/en/endpoints/upload). Videos and audio — via files/upload only.

## Error handling

API responses are JSON `{"code", "msg", "data"}`; errors also have a string `error` field (type). **On `/api/v1/*` the HTTP status matches body `code`.**

### Example response bodies

**400**

```json
{
  "code": 400,
  "msg": "input.duration: must be between 4 and 30, or \"auto\" / -1",
  "data": null,
  "error": "invalid_request_error"
}
```

**401**

```json
{
  "code": 401,
  "msg": "Authentication failed. Please check your API key",
  "data": null,
  "error": "authentication_error"
}
```

**402**

```json
{
  "code": 402,
  "msg": "Insufficient balance. Please top up and try again. Available: $0.01, required: $0.015. Top up at https://mixmedia.tech/cabinet/billing",
  "data": {
    "balance": "0.0100",
    "required": "0.0150",
    "currency": "USD",
    "topUpUrl": "https://mixmedia.tech/cabinet/billing"
  },
  "error": "payment_required"
}
```

**429**

```json
{
  "code": 429,
  "msg": "Rate limit exceeded: 10 createTask/upload requests per 10 s per key. Retry after 8s",
  "data": null,
  "error": "rate_limit_error"
}
```

**500**

```json
{
  "code": 500,
  "msg": "Internal server error",
  "data": null,
  "error": "server_error"
}
```

### Codes on createTask / upload

| code | error | Meaning | What to do |
|---|---|---|---|
| 400 | `invalid_request_error` | Invalid parameter or body | See `msg` |
| 400 | `unsupported_model` | Unknown model | [Model list](https://docs.mixmedia.tech/en/models) |
| 400 | `nsfw_content_detected` | Moderation / content policy — `msg` / `failMsg` is the upstream text verbatim | Read the refusal text, change the prompt or files |
| 401 | `authentication_error` | Missing or invalid key | Check the key |
| 402 | `payment_required` | Not enough balance | Top up |
| 403 | `permission_error` | No access | Contact support |
| 429 | `rate_limit_error` | Too many requests | Wait for `Retry-After` |
| 505 | `model_disabled` | Model temporarily disabled | Pick another |
| 500 | `server_error` | Our failure | Retry later |

Example `msg` values: `Authentication failed. Please check your API key` (401); `Insufficient balance. Please top up and try again…` (402).

### Task errors (recordInfo)

If the task was created and then failed: `state: "fail"` (alias `status: "failed"`), `failCode` / `failMsg`, and `error: { code, message, type }`. Money is refunded (`refunded: true`).

| failCode | error.type | Meaning |
|---|---|---|
| 400 | `nsfw_content_detected` / `invalid_request_error` | Moderation — `failMsg` is upstream text verbatim |
| 422 | `invalid_request_error` | The model rejected the parameters (length, mode, resolution, file) |
| 501 | `server_error` | The model could not generate (`failMsg`) |
| 504 | `timeout_error` | Timed out — retry |
| 500 / 503 | `server_error` | Service temporarily unavailable |

### Rate limits

| What | Limit |
|---|---|
| createTask and upload | 20 per 10 s per key |
| recordInfo / list / balance | 100 per 10 s per key |

Over the limit — HTTP 429 and `Retry-After`.