Jimeng video generation.

Video generation endpoint in the official Jimeng API format. Use the `Action` parameter to specify the operation type: - `CVSync2AsyncSubmitTask`: Submit a video generation task - `CVSync2AsyncGetResult`: Retrieve task results `Action` and `Version` must be specified in the query parameters.

curl -X POST "https://example.com/jimeng/?Action=CVSync2AsyncSubmitTask&Version=2022-08-31" \  -H "Content-Type: application/json" \  -d '{    "req_key": "jimeng_video_generation",    "prompt": "A cat playing the piano"  }'

{
  "code": 0,
  "message": "string",
  "data": {}
}

{
  "error": {
    "code": "string",
    "message": "string",
    "request_id": "string"
  }
}