# FFmpeg API Compose API

> متعدد ٹریکس کو ایک ویڈیو میں جوڑتا ہے، جس میں بالکل ایک بصری ٹریک اور کسی بھی تعداد میں آڈیو ٹریکس ہوتے ہیں

`tracks` کی فہرست سے حتمی ویڈیو بناتا ہے۔ فہرست میں بالکل ایک بصری ٹریک، یعنی ویڈیو یا تصویر، ہونا چاہیے اور کسی بھی تعداد میں آڈیو ٹریکس شامل ہو سکتے ہیں۔ آؤٹ پٹ JSON ہوتا ہے جس میں `video_url` اور `thumbnail_url` شامل ہیں۔

- Model id: `ffmpeg-api/compose`
- Made by: Utility
- Category: Video to Video
- Output: json
- Estimated price per run: $0.001 / run (cheapest run $0.001 (1 API credit))
- Run: `POST https://api.doitong.com/v1/run/ffmpeg-api/compose`
- Quote: `POST https://api.doitong.com/v1/quote/ffmpeg-api/compose`
- Docs page: https://doitong.com/ur/developers/models/ffmpeg-api/compose

## Pricing

Price: **$0.001 / run**. Estimated from the typical cost of one run. The quote is exactly what the run charges.

The full example input below costs $0.001 = 1 API credit (1 request × 1 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/ffmpeg-api/compose` 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 |
|---|---|---|---|---|---|---|
| `tracks` |  | array of object {id, type, keyframes} | yes |  |  | حتمی media جوڑنے کے لیے track list؛ اس میں بالکل ایک ویڈیو یا تصویر track اور آڈیو tracks کی غیر محدود تعداد شامل ہوتی ہے۔ |
| `tracks[].id` |  | string | yes |  |  | track کی منفرد شناخت کرنے والا identifier۔ |
| `tracks[].type` |  | string | yes |  |  | track category: 'video'، 'audio' یا 'image'۔ |
| `tracks[].keyframes` |  | array of object {timestamp, duration, url} | yes |  |  | track پر مشتمل keyframes، فہرست کی صورت میں فراہم کردہ۔ |
| `tracks[].keyframes[].timestamp` |  | number | yes |  |  | keyframe کا start time، milliseconds میں۔ |
| `tracks[].keyframes[].duration` |  | number | yes |  |  | keyframe کی length، milliseconds میں۔ |
| `tracks[].keyframes[].url` |  | string | yes |  |  | اس keyframe کی media فائل تک رسائی فراہم کرنے والا URL۔ |

## Example input

Required parameters only:

```json
{
  "tracks": [
    {
      "id": "your-id",
      "type": "example",
      "keyframes": [
        {
          "timestamp": 1,
          "duration": 1,
          "url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg"
        }
      ]
    }
  ]
}
```

A fuller example:

```json
{
  "tracks": [
    {
      "id": "your-id",
      "type": "example",
      "keyframes": [
        {
          "timestamp": 1,
          "duration": 1,
          "url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg"
        }
      ]
    }
  ]
}
```

## 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/ffmpeg-api/compose?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "tracks": [
      {
        "id": "your-id",
        "type": "example",
        "keyframes": [
          {
            "timestamp": 1,
            "duration": 1,
            "url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg"
          }
        ]
      }
    ]
  }'

# 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/ffmpeg-api/compose?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "tracks": [
      {
        "id": "your-id",
        "type": "example",
        "keyframes": [
          {
            "timestamp": 1,
            "duration": 1,
            "url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg"
          }
        ]
      }
    ]
  }),
});
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 = {
    "tracks": [
        {
            "id": "your-id",
            "type": "example",
            "keyframes": [
                {
                    "timestamp": 1,
                    "duration": 1,
                    "url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
                },
            ],
        },
    ],
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/ffmpeg-api/compose", 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": "ffmpeg-api/compose",
      "input": {
        "tracks": [
          {
            "id": "your-id",
            "type": "example",
            "keyframes": [
              {
                "timestamp": 1,
                "duration": 1,
                "url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg"
              }
            ]
          }
        ]
      },
      "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": "ffmpeg-api/compose",
  "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": 1,
    "usd": "0.001",
    "charged": 1,
    "refunded": 0
  },
  "input": {
    "tracks": [
      {
        "id": "your-id",
        "type": "example",
        "keyframes": [
          {
            "timestamp": 1,
            "duration": 1,
            "url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg"
          }
        ]
      }
    ]
  },
  "output": {
    "video_url": "string",
    "thumbnail_url": "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 |
|---|---|---|
| `video_url` | string (video URL) | processed ویڈیو کا URL۔ |
| `thumbnail_url` | string | ویڈیو کے thumbnail کا URL۔ |

## Related models

- [Ffmpeg Api · Extract Frame](https://doitong.com/developers/models/ffmpeg-api/extract-frame.md) (`ffmpeg-api/extract-frame`): $0.0002 / second of input video
- [Ffmpeg Api Merge Audio-Video](https://doitong.com/developers/models/ffmpeg-api/merge-audio-video.md) (`ffmpeg-api/merge-audio-video`): $0.0002 / second of input video
- [FFmpeg API \[Merge Audios\]](https://doitong.com/developers/models/ffmpeg-api/merge-audios.md) (`ffmpeg-api/merge-audios`): $0.00017 / second of processing time
- [Auto-Captioner](https://doitong.com/developers/models/auto-caption.md) (`auto-caption`): $0.10 / video
- [Ffmpeg Api · Merge Videos](https://doitong.com/developers/models/ffmpeg-api/merge-videos.md) (`ffmpeg-api/merge-videos`): $0.00017 / second of processing time
- [Workflow Utilities Auto Subtitle](https://doitong.com/developers/models/workflow-utilities/auto-subtitle.md) (`workflow-utilities/auto-subtitle`): $0.03 / minute of input video
- [Workflow Utilities Blend Video](https://doitong.com/developers/models/workflow-utilities/blend-video.md) (`workflow-utilities/blend-video`): $0.001 / second of processing time
- [Workflow Utilities Interleave Video](https://doitong.com/developers/models/workflow-utilities/interleave-video.md) (`workflow-utilities/interleave-video`): $0.00017 / second of processing time

## Links

- HTML page: https://doitong.com/developers/models/ffmpeg-api/compose
- 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=ffmpeg-api/compose
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.com/v1/models/ffmpeg-api/compose