> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tokenlab.sh/llms.txt
> Use this file to discover all available pages before exploring further.

# 获取视频状态

> 检索视频生成任务的状态和结果

## 路径参数

<ParamField path="id" type="string" required>
  从创建视频请求返回的任务 ID。将 `id` 和 `task_id` 视为相同的异步标识。
</ParamField>

<Info>
  如果创建响应返回 `poll_url`，请调用该精确 URL。当它指向 `/v1/tasks/{id}` 时，将其视为规范的固定状态端点。

  如果该任务已不存在或无法再从公开任务记录中查询到，TokenLab 会返回 `async_task_not_found`，并附带消息 `Task not found or no longer available.`
</Info>

## 响应

<ResponseField name="id" type="string">
  规范的异步任务标识符。
</ResponseField>

<ResponseField name="task_id" type="string">
  异步任务标识符别名。
</ResponseField>

<ResponseField name="poll_url" type="string">
  当创建响应提供时的首选轮询 URL。
</ResponseField>

<ResponseField name="billing_transaction_id" type="string">
  当结算已经完成时返回 TokenLab 账单交易 ID。它对应 dashboard / 对账使用的交易标识，与异步 `id` / `task_id` 不同。
</ResponseField>

<ResponseField name="status" type="string">
  任务状态：`pending`、`processing`、`completed`、`failed`。
</ResponseField>

<ResponseField name="progress" type="number">
  可选进度值。仅在任务提供真实进度时返回；请使用 `status` 判断任务是否完成。
</ResponseField>

<ResponseField name="video_url" type="string">
  生成视频的 URL（完成时）。
</ResponseField>

<ResponseField name="video" type="object">
  单个视频负载，在可用时包含 `url`、`duration`、`width` 和 `height`。
</ResponseField>

<ResponseField name="videos" type="array">
  当生成任务返回多个输出时的多个视频负载。
</ResponseField>

<ResponseField name="error" type="string">
  错误信息（如果失败）。
</ResponseField>

<ResponseField name="created" type="integer">
  创建时间戳。
</ResponseField>

<ResponseField name="updated" type="integer">
  最后更新时间戳。
</ResponseField>

<ResponseField name="model" type="string">
  用于该任务的模型。
</ResponseField>

<RequestExample>
  ```bash cURL theme={null}
  curl "https://api.tokenlab.sh/v1/tasks/ldtask_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \
    -H "Authorization: Bearer sk-your-api-key"
  ```

  ```python Python theme={null}
  import requests
  import time

  task_id = "ldtask_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"

  while True:
      response = requests.get(
          f"https://api.tokenlab.sh/v1/tasks/{task_id}",
          headers={"Authorization": "Bearer sk-your-api-key"}
      )

      data = response.json()
      print(f"Status: {data['status']}")

      if data["status"] == "completed":
          print(f"Video URL: {data['video_url']}")
          break
      elif data["status"] == "failed":
          print(f"Error: {data['error']}")
          break

      time.sleep(5)  # Poll every 5 seconds
  ```

  ```javascript JavaScript theme={null}
  const taskId = 'ldtask_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa';

  async function pollForVideo() {
    while (true) {
      const response = await fetch(
        `https://api.tokenlab.sh/v1/tasks/${taskId}`,
        { headers: { 'Authorization': 'Bearer sk-your-api-key' } }
      );

      const data = await response.json();
      console.log(`Status: ${data.status}`);

      if (data.status === 'completed') {
        console.log(`Video URL: ${data.video_url}`);
        return data.video_url;
      } else if (data.status === 'failed') {
        throw new Error(data.error);
      }

      await new Promise(r => setTimeout(r, 5000));
    }
  }
  ```

  ```go Go theme={null}
  package main

  import (
      "encoding/json"
      "fmt"
      "net/http"
      "time"
  )

  func main() {
      taskID := "ldtask_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"

      for {
          req, _ := http.NewRequest("GET",
              fmt.Sprintf("https://api.tokenlab.sh/v1/tasks/%s", taskID), nil)
          req.Header.Set("Authorization", "Bearer sk-your-api-key")

          client := &http.Client{}
          resp, _ := client.Do(req)

          var result map[string]interface{}
          json.NewDecoder(resp.Body).Decode(&result)
          resp.Body.Close()

          fmt.Printf("Status: %s\n", result["status"])

          if result["status"] == "completed" {
              fmt.Printf("Video URL: %s\n", result["video_url"])
              break
          } else if result["status"] == "failed" {
              fmt.Printf("Error: %s\n", result["error"])
              break
          }

          time.Sleep(5 * time.Second)
      }
  }
  ```

  ```php PHP theme={null}
  <?php
  $taskId = 'ldtask_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa';

  while (true) {
      $ch = curl_init("https://api.tokenlab.sh/v1/tasks/{$taskId}");

      curl_setopt_array($ch, [
          CURLOPT_RETURNTRANSFER => true,
          CURLOPT_HTTPHEADER => [
              'Authorization: Bearer sk-your-api-key'
          ]
      ]);

      $response = curl_exec($ch);
      curl_close($ch);

      $data = json_decode($response, true);
      echo "Status: {$data['status']}\n";

      if ($data['status'] === 'completed') {
          echo "Video URL: {$data['video_url']}\n";
          break;
      } elseif ($data['status'] === 'failed') {
          echo "Error: {$data['error']}\n";
          break;
      }

      sleep(5);
  }
  ```
</RequestExample>

<ResponseExample>
  ```json Response (pending) theme={null}
  {
    "id": "ldtask_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    "task_id": "ldtask_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    "poll_url": "/v1/tasks/ldtask_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    "status": "pending",
    "model": "veo3.1",
    "created": 1706000000,
    "updated": 1706000000
  }
  ```

  ```json Response (processing) theme={null}
  {
    "id": "ldtask_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    "task_id": "ldtask_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    "poll_url": "/v1/tasks/ldtask_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    "status": "processing",
    "model": "veo3.1",
    "created": 1706000000,
    "updated": 1706000030
  }
  ```

  ```json Response (completed) theme={null}
  {
    "id": "ldtask_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    "task_id": "ldtask_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    "poll_url": "/v1/tasks/ldtask_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    "billing_transaction_id": "cmo164zyc0s48jpgegi80vqv4",
    "status": "completed",
    "video_url": "https://assets.tokenlab.sh/videos/abc123.mp4",
    "model": "veo3.1",
    "created": 1706000000,
    "updated": 1706000060
  }
  ```

  ```json Response (failed) theme={null}
  {
    "id": "ldtask_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    "task_id": "ldtask_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    "poll_url": "/v1/tasks/ldtask_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    "status": "failed",
    "error": "Content policy violation",
    "model": "veo3.1",
    "created": 1706000000,
    "updated": 1706000060
  }
  ```
</ResponseExample>

## 轮询最佳实践

* 每 5-10 秒轮询一次
* 为长期任务实现指数退避
* 设置最大超时（例如 10 分钟）
* 优雅地处理 `failed` 状态

```python theme={null}
import time

def wait_for_video(task_id, max_wait=600, interval=5):
    """Wait for video with timeout."""
    start = time.time()

    while time.time() - start < max_wait:
        response = requests.get(
            f"https://api.tokenlab.sh/v1/tasks/{task_id}",
            headers={"Authorization": "Bearer sk-your-api-key"}
        )
        data = response.json()

        if data["status"] == "completed":
            return data["video_url"]
        elif data["status"] == "failed":
            raise Exception(data.get("error", "Video generation failed"))

        time.sleep(interval)

    raise TimeoutError("Video generation timed out")
```