feat(*): 插件中心与模型协议 - 完善声明式协议运行时并增加功能开放控制
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# 火山方舟视频任务
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本插件使用 Ark Contents Generations Tasks 异步接口。提示词和参考图组成 `content[]`;比例、分辨率、时长、音频和水印位于顶层任务参数。
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## 接口与鉴权
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{{OPERATIONS}}
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```http
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POST {channel_base_url}/api/v3/contents/generations/tasks
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GET {channel_base_url}/api/v3/contents/generations/tasks/{task_id}
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Authorization: Bearer <ARK_API_KEY>
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Content-Type: application/json
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```
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## 模型与约束
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模型通常对应控制台可用模型或 endpoint ID。允许时长、分辨率、画幅、参考图数量、是否可生成音频及计费由具体模型决定。插件默认 5 秒、`16:9`、`720p`,默认值不是上游能力承诺。
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## 参数与字段映射
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{{PARAMETERS}}
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每张图片构造为 `{"type":"image_url","image_url":{"url":"..."},"role":"reference_image"}`。当前不发送参考视频与参考音频;`generate_audio` 和 `watermark` 只在 true 时发送。
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## 创建任务示例
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```bash
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curl "{channel_base_url}/api/v3/contents/generations/tasks" \
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-H "Authorization: Bearer <ARK_API_KEY>" \
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-H "Content-Type: application/json" \
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-d '{
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"model":"YOUR_ARK_VIDEO_MODEL",
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"content":[
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{"type":"text","text":"保持人物一致,镜头缓慢环绕"},
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{"type":"image_url","image_url":{"url":"https://example.com/subject.png"},"role":"reference_image"}
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],
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"ratio":"16:9",
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"resolution":"720p",
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"duration":5,
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"generate_audio":true,
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"watermark":false
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}'
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```
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## 查询、状态与结果
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创建响应任务 ID 由统一解析器从顶层、`task` 或 `data` 提取。查询成功后读取视频数组或常见 URL 字段。若 Ark 把结果放在其他嵌套路径,必须用真实 fixture 增加专属解析,不允许只根据 `completed` 返回空成功。
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任务失败可能来自 endpoint 不可用、素材下载失败、参数组合不受支持、内容审核、并发或额度限制。上游 request ID 应保留用于排查,API Key 和素材正文不得进入日志。
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## 官方资料
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- [火山方舟视频生成 API](https://www.volcengine.com/docs/82379)
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- [火山方舟内容生成任务文档](https://www.volcengine.com/docs/82379/1520757)
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{{CONTRACT}}
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