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音乐延伸

Flow Music 对已生成的音频续写。从指定时间点开始，按编辑指令延伸音乐

Flow Music 对已生成的音频续写。从指定时间点开始，按编辑指令延伸音乐

请求示例

bash curl --request POST \ --url https://api.openveer.com/v1/music/generations/extendFlowMusic \ --header 'Authorization: Bearer <token>' \ --header 'Content-Type: application/json' \ --data '{ "model": "flowmusic", "clip_id": "abc123-def456", "extend_from_s": 30, "extend_s": 60, "instruction": "延续主歌旋律，加入弦乐" }'

```python
import requests

url = "https://api.openveer.com/v1/music/generations/extendFlowMusic"

payload = {
"model": "flowmusic",
"clip_id": "abc123-def456",
"extend_from_s": 30,
"extend_s": 60,
"instruction": "延续主歌旋律，加入弦乐"
}

headers = {
"Authorization": "Bearer ",
"Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript
const url = "https://api.openveer.com/v1/music/generations/extendFlowMusic";

const payload = {
model: "flowmusic",
clip_id: "abc123-def456",
extend_from_s: 30,
extend_s: 60,
instruction: "延续主歌旋律，加入弦乐"
};

const headers = {
"Authorization": "Bearer ",
"Content-Type": "application/json"
};

fetch(url, {
method: "POST",
headers: headers,
body: JSON.stringify(payload)
})
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.error('Error:', error));
```

响应示例

json { "code": 200, "data": [ { "status": "submitted", "task_id": "task_01KWXVCYB70YJ1WY9X22RVYRNP" } ] }

json { "error": { "message": "clip_id is required", "type": "invalid_request", "param": "", "code": "invalid_request" } }

json { "error": { "message": "余额不足", "type": "invalid_request", "param": "", "code": "quota_not_enough" } }

json { "error": { "message": "当前分组容量饱和，请稍后重试", "type": "rate_limit_error", "param": "", "code": "rate_limit_error" } }

认证

Authorization string
所有接口均需要使用 Bearer Token 进行认证 获取 API Key： 访问 [API Key 管理页面](https://openveer.com) 获取您的 API Key 使用时在请求头中添加： ``` Authorization: Bearer YOUR_API_KEY ```

请求参数

model string
模型名称，**固定传 `"flowmusic"`**（大小写不敏感）
clip_id string
源音乐 clip\_id，来自已成功任务的 `result.music[].clip_id`
注意
源任务必须已成功。外部音频可先通过[上传音频](./upload-audio)导入换取 clip\_id。
extend_from_s number
开始续写的时间点（秒） 不能超过源 clip 时长
extend_s number
续写时长（秒） 最大值：`164` 秒
instruction string
续写音乐的编辑指令 示例：`"延续主歌旋律，加入弦乐"`
title string
续写后音乐标题
seed string
随机种子，用于复现结果

响应

code integer
响应状态码，成功时为 200
data array
返回数据数组 任务状态，初始提交时为 `submitted`
task_id string
任务唯一标识符，用于查询任务状态和结果

使用场景

场景 1：从副歌处续写 60 秒

{
  "model": "flowmusic",
  "clip_id": "abc123-def456",
  "extend_from_s": 30,
  "extend_s": 60,
  "instruction": "延续主歌旋律，加入弦乐"
}
注意
**查询任务结果** 音乐延伸为异步任务，提交后会返回 `task_id`。使用 [获取任务状态](./query) 接口查询生成进度和结果。延伸产物是**新的** `clip_id`，后续操作请使用新 clip\_id。

任务完成结果示例

查询返回示例（GET /v1/music/tasks/{task_id}）：

{
  "code": 200,
  "data": {
    "id": "task_01KWXVCYB70YJ1WY9X22RVYRNP",
    "status": "completed",
    "progress": 100,
    "created": 1783413242,
    "completed": 1783413292,
    "actual_time": 50,
    "cost": 0.048,
    "credits_cost": 0.48,
    "result": {
      "music": [
        {
          "clip_id": "d2f589ea-5390-4e83-8e2f-4517420408fa",
          "title": "Untitled (Extended)",
          "duration_seconds": "39.95733333",
          "create_time": "2026-07-07T08:34:33.240020Z",
          "lyrics": "waking up to the morning light,\n...",
          "lyrics_id": "0452451b-9e54-5d9f-8437-8bff97c7bbc8",
          "lyrics_timing_markers": [[0, 12], [129, 20]],
          "audio_url": "https://cdn.apimart.ai/audio/flowmusic_d2f589ea.m4a",
          "wav_url": "https://cdn.apimart.ai/audio/flowmusic_d2f589ea.wav",
          "image_url": "https://cdn.apimart.ai/image/flowmusic_d2f589ea_cover.jpg"
        }
      ]
    }
  }
}