Kling Extend-Video

01

概览

使用必填输入提交Extend Video请求。使用返回的 Task ID 查询状态，或提供 callback_url 接收下方列出的投递。

快速开始

创建 API Key，并将其设置为 RUNAPI_API_KEY。
发送与请求 Schema 匹配的 POST 请求。
保存返回的任务 ID，随后轮询到终态，或处理下方列出的回调。

POST /api/v1/kling/extend_video

基础 URL: https://runapi.ai
API 版本: v1
身份验证: Authorization: Bearer YOUR_API_TOKEN

02

支持的模型

打开模型页可查看当前价格、限流和商业使用详情。

03

请求 Schema

JSON 请求体

只发送文档列出的字段。提供 callback_url 后，它会收到下方列出的 Task 投递。

kling-v2.5-turbo-image-to-video-pro4 个字段

callback_urlstring

可选

Webhook URL for async notifications.

modestring

可选

Extension quality mode.

可选值: std, pro 默认值: std

promptstring

可选

Optional description for the continuation.

source_task_idstring

必填

Completed Kling v2.5 Turbo source task ID.

kling-v2.5-turbo-text-to-video-pro4 个字段

callback_urlstring

可选

Webhook URL for async notifications.

modestring

可选

Extension quality mode.

可选值: std, pro 默认值: std

promptstring

可选

Optional description for the continuation.

source_task_idstring

必填

Completed Kling v2.5 Turbo source task ID.

04

创建已接受

HTTP 202

POST /api/v1/kling/extend_video

响应 Schema

JSON

{
  "properties": {
    "billing": {
      "properties": {
        "refund": {
          "oneOf": [
            {
              "properties": {
                "refunded_at": {
                  "type": "string"
                }
              },
              "required": [
                "refunded_at"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        },
        "reservation": {
          "oneOf": [
            {
              "properties": {
                "amount_cents": {
                  "type": "integer"
                }
              },
              "required": [
                "amount_cents"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        },
        "settlement": {
          "oneOf": [
            {
              "properties": {
                "amount_micro_cents": {
                  "type": "integer"
                },
                "charged_amount_cents": {
                  "type": "integer"
                }
              },
              "required": [
                "charged_amount_cents",
                "amount_micro_cents"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        }
      },
      "required": [
        "reservation",
        "settlement",
        "refund"
      ],
      "type": "object",
      "unevaluatedProperties": false
    },
    "id": {
      "type": "string"
    },
    "status": {
      "enum": [
        "processing"
      ],
      "type": "string"
    },
    "task_replayed": {
      "type": "boolean"
    }
  },
  "required": [
    "id",
    "status",
    "billing"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

响应示例

JSON

{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "id": "tsk_reference_demo",
  "status": "processing"
}

05

轮询处理中

HTTP 200

GET /api/v1/kling/extend_video/:id

响应 Schema

JSON

{
  "properties": {
    "billing": {
      "properties": {
        "refund": {
          "oneOf": [
            {
              "properties": {
                "refunded_at": {
                  "type": "string"
                }
              },
              "required": [
                "refunded_at"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        },
        "reservation": {
          "oneOf": [
            {
              "properties": {
                "amount_cents": {
                  "type": "integer"
                }
              },
              "required": [
                "amount_cents"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        },
        "settlement": {
          "oneOf": [
            {
              "properties": {
                "amount_micro_cents": {
                  "type": "integer"
                },
                "charged_amount_cents": {
                  "type": "integer"
                }
              },
              "required": [
                "charged_amount_cents",
                "amount_micro_cents"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        }
      },
      "required": [
        "reservation",
        "settlement",
        "refund"
      ],
      "type": "object",
      "unevaluatedProperties": false
    },
    "id": {
      "type": "string"
    },
    "status": {
      "enum": [
        "processing"
      ],
      "type": "string"
    }
  },
  "required": [
    "id",
    "status",
    "billing"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

响应示例

JSON

{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "id": "tsk_reference_demo",
  "status": "processing"
}

06

轮询已完成

HTTP 200

GET /api/v1/kling/extend_video/:id

响应 Schema

JSON

{
  "properties": {
    "billing": {
      "properties": {
        "refund": {
          "oneOf": [
            {
              "properties": {
                "refunded_at": {
                  "type": "string"
                }
              },
              "required": [
                "refunded_at"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        },
        "reservation": {
          "oneOf": [
            {
              "properties": {
                "amount_cents": {
                  "type": "integer"
                }
              },
              "required": [
                "amount_cents"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        },
        "settlement": {
          "oneOf": [
            {
              "properties": {
                "amount_micro_cents": {
                  "type": "integer"
                },
                "charged_amount_cents": {
                  "type": "integer"
                }
              },
              "required": [
                "charged_amount_cents",
                "amount_micro_cents"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        }
      },
      "required": [
        "reservation",
        "settlement",
        "refund"
      ],
      "type": "object",
      "unevaluatedProperties": false
    },
    "id": {
      "type": "string"
    },
    "status": {
      "enum": [
        "completed"
      ],
      "type": "string"
    },
    "videos": {
      "items": {
        "properties": {
          "url": {
            "type": "string",
            "x-runapi-generated-media": true
          }
        },
        "required": [
          "url"
        ],
        "type": "object",
        "unevaluatedProperties": false
      },
      "type": "array"
    }
  },
  "required": [
    "id",
    "status",
    "videos",
    "billing"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

响应示例

JSON

{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "id": "tsk_reference_demo",
  "status": "completed",
  "videos": [
    {
      "url": "https://file.runapi.ai/reference-video.mp4"
    }
  ]
}

07

轮询失败

HTTP 200

GET /api/v1/kling/extend_video/:id

响应 Schema

JSON

{
  "properties": {
    "billing": {
      "properties": {
        "refund": {
          "oneOf": [
            {
              "properties": {
                "refunded_at": {
                  "type": "string"
                }
              },
              "required": [
                "refunded_at"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        },
        "reservation": {
          "oneOf": [
            {
              "properties": {
                "amount_cents": {
                  "type": "integer"
                }
              },
              "required": [
                "amount_cents"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        },
        "settlement": {
          "oneOf": [
            {
              "properties": {
                "amount_micro_cents": {
                  "type": "integer"
                },
                "charged_amount_cents": {
                  "type": "integer"
                }
              },
              "required": [
                "charged_amount_cents",
                "amount_micro_cents"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        }
      },
      "required": [
        "reservation",
        "settlement",
        "refund"
      ],
      "type": "object",
      "unevaluatedProperties": false
    },
    "error": {
      "type": "string"
    },
    "id": {
      "type": "string"
    },
    "status": {
      "enum": [
        "failed"
      ],
      "type": "string"
    }
  },
  "required": [
    "id",
    "status",
    "error",
    "billing"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

响应示例

JSON

{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "error": "Task processing failed.",
  "id": "tsk_reference_demo",
  "status": "failed"
}

08

客户回调：已完成

HTTP 200

POST callback_url

响应 Schema

JSON

{
  "properties": {
    "id": {
      "type": "string"
    },
    "status": {
      "enum": [
        "completed"
      ],
      "type": "string"
    },
    "videos": {
      "items": {
        "properties": {
          "url": {
            "type": "string",
            "x-runapi-generated-media": true
          }
        },
        "required": [
          "url"
        ],
        "type": "object",
        "unevaluatedProperties": false
      },
      "type": "array"
    }
  },
  "required": [
    "id",
    "status",
    "videos"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

响应示例

JSON

{
  "id": "tsk_reference_demo",
  "status": "completed",
  "videos": [
    {
      "url": "https://file.runapi.ai/reference-video.mp4"
    }
  ]
}

09

客户回调：失败

HTTP 200

POST callback_url

响应 Schema

JSON

{
  "properties": {
    "error": {
      "oneOf": [
        {
          "type": "string"
        },
        {
          "properties": {
            "code": {
              "type": "string"
            },
            "limit_cents": {
              "type": "integer"
            },
            "message": {
              "type": "string"
            },
            "reset_at": {
              "format": "date-time",
              "type": [
                "string",
                "null"
              ]
            },
            "used_cents": {
              "type": "integer"
            },
            "window": {
              "enum": [
                "1h",
                "1d",
                "7d",
                "daily",
                "weekly",
                "monthly",
                "lifetime"
              ],
              "type": "string"
            }
          },
          "required": [
            "code",
            "message"
          ],
          "type": "object",
          "unevaluatedProperties": false
        }
      ]
    },
    "id": {
      "type": "string"
    },
    "status": {
      "enum": [
        "failed"
      ],
      "type": "string"
    }
  },
  "required": [
    "id",
    "status",
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

响应示例

JSON

{
  "error": {
    "code": "generation_failed",
    "message": "Task processing failed."
  },
  "id": "tsk_reference_demo",
  "status": "failed"
}

10

错误

HTTP 401

POST /api/v1/kling/extend_video

响应 Schema

JSON

{
  "properties": {
    "error": {
      "description": "Human-readable error message.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

响应示例

JSON

{
  "error": "Authentication required"
}

11

错误

HTTP 401

GET /api/v1/kling/extend_video/:id

响应 Schema

JSON

{
  "properties": {
    "error": {
      "description": "Human-readable error message.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

响应示例

JSON

{
  "error": "Authentication required"
}

12

错误

HTTP 400

POST /api/v1/kling/extend_video

响应 Schema

JSON

{
  "oneOf": [
    {
      "properties": {
        "error": {
          "description": "Human-readable error message.",
          "type": "string"
        }
      },
      "required": [
        "error"
      ],
      "type": "object",
      "unevaluatedProperties": false
    },
    {
      "properties": {
        "error": {
          "description": "Human-readable validation summary.",
          "type": "string"
        },
        "errors": {
          "additionalProperties": {
            "items": {
              "type": "string"
            },
            "type": "array"
          },
          "description": "Validation messages keyed by public request field, with an array of human-readable strings for each field.",
          "type": "object"
        }
      },
      "required": [
        "error",
        "errors"
      ],
      "type": "object",
      "unevaluatedProperties": false
    }
  ]
}

响应示例

JSON

{
  "error": "Validation failed",
  "errors": {
    "source_task_id": [
      "is required"
    ]
  }
}

13

错误

HTTP 402

POST /api/v1/kling/extend_video

响应 Schema

JSON

{
  "properties": {
    "error": {
      "description": "Human-readable error message.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

响应示例

JSON

{
  "error": "Insufficient balance"
}

14

错误

HTTP 429

POST /api/v1/kling/extend_video

响应 Schema

JSON

{
  "properties": {
    "error": {
      "description": "Human-readable error message.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

响应示例

JSON

{
  "error": "API key credit limit exceeded"
}

15

错误

HTTP 409

POST /api/v1/kling/extend_video

响应 Schema

JSON

{
  "properties": {
    "error": {
      "description": "Human-readable error message.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

响应示例

JSON

{
  "error": "The request uses features that are not supported for the selected model"
}

16

错误

HTTP 429

POST /api/v1/kling/extend_video

响应 Schema

JSON

{
  "properties": {
    "error": {
      "description": "Human-readable error message.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

响应示例

JSON

{
  "error": "Rate limit reached. Please retry later."
}

17

错误

HTTP 503

POST /api/v1/kling/extend_video

响应 Schema

JSON

{
  "properties": {
    "error": {
      "description": "Human-readable error message.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

响应示例

JSON

{
  "error": "Service under maintenance, please try again later"
}

18

错误

HTTP 504

POST /api/v1/kling/extend_video

响应 Schema

JSON

{
  "properties": {
    "error": {
      "description": "Human-readable error message.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

响应示例

JSON

{
  "error": "The request timed out"
}

19

错误

HTTP 404

GET /api/v1/kling/extend_video/:id

响应 Schema

JSON

{
  "properties": {
    "error": {
      "description": "Human-readable error message.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

响应示例

JSON

{
  "error": "Task with id 'tsk_reference_demo' not found"
}

20

生成的代码示例

直接使用 cURL，或安装所用语言的 SDK。每个示例都会提交本参考中经过验证的请求。

安装

Shell

pip install runapi-kling

PYTHON

import os
from runapi.kling import KlingClient

client = KlingClient(api_key=os.environ["RUNAPI_API_KEY"])
task = client.extend_video.create(
  source_task_id="tsk_source_video"
)

安装

Shell

npm install @runapi.ai/kling

JAVASCRIPT

import { KlingClient } from "@runapi.ai/kling";

const client = new KlingClient({ apiKey: process.env.RUNAPI_API_KEY });
const task = await client.extendVideo.create({
  "source_task_id": "tsk_source_video"
});

CURL

curl -X POST https://runapi.ai/api/v1/kling/extend_video \
  -H 'Authorization: Bearer YOUR_API_TOKEN' \
  -H 'Content-Type: application/json' \
  -d '{"source_task_id":"tsk_source_video"}'

安装

Shell

go get github.com/runapi-ai/kling-sdk/go@latest

GO

package main

import (
  "context"
  "log"
  "os"

  "github.com/runapi-ai/core-sdk/go/option"
  kling "github.com/runapi-ai/kling-sdk/go/kling"
)

func main() {
  client, err := kling.NewClient(option.WithAPIKey(os.Getenv("RUNAPI_API_KEY")))
  if err != nil {
    log.Fatal(err)
  }

  task, err := client.ExtendVideo.Create(context.Background(), kling.ExtendVideoParams{
    SourceTaskID: "tsk_source_video",
  })
  if err != nil {
    log.Fatal(err)
  }
  _ = task
}

21

Kling Extend-Video

概览

快速开始

端点

支持的模型

请求 Schema

创建已接受

响应示例

轮询处理中

响应示例

轮询已完成

响应示例

轮询失败

响应示例

客户回调：已完成

响应示例

客户回调：失败

响应示例

错误

响应示例

错误

响应示例

错误

响应示例

错误

响应示例

错误

响应示例

错误

响应示例

错误

响应示例

错误

响应示例

错误

响应示例

错误

响应示例

生成的代码示例

安装

相关指南