# FFmpeg API Compose API

> Pinagsasama ang ilang track sa isang video, na eksaktong isang visual track at anumang bilang ng audio track

Bumubuo ng final video mula sa listahan ng `tracks`. Dapat maglaman ang listahan ng eksaktong isang visual track, video man o larawan, at maaaring maglaman ng anumang bilang ng audio track. JSON ang output na may `video_url` at `thumbnail_url`.

- 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/fil/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 |  |  | Listahan ng track para buuin ang final media, na binubuo ng eksaktong isang video o larawan track at walang limitasyong bilang ng audio track. |
| `tracks[].id` |  | string | yes |  |  | Identifier na natatanging tumutukoy sa track. |
| `tracks[].type` |  | string | yes |  |  | Kategorya ng track: 'video', 'audio', o 'image'. |
| `tracks[].keyframes` |  | array of object {timestamp, duration, url} | yes |  |  | Mga keyframe na bumubuo sa track, na ibinigay bilang listahan. |
| `tracks[].keyframes[].timestamp` |  | number | yes |  |  | Oras ng pagsisimula ng keyframe, na ipinahayag sa milliseconds. |
| `tracks[].keyframes[].duration` |  | number | yes |  |  | Haba ng keyframe, na ipinahayag sa milliseconds. |
| `tracks[].keyframes[].url` |  | string | yes |  |  | URL na nagbibigay ng access sa media file para sa keyframe na ito. |

## 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) | URL na tumutukoy sa naprosesong video. |
| `thumbnail_url` | string | URL na tumutukoy sa thumbnail ng video. |

## 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