curl --request POST 'https://xcompute.us/kling/v1/audio/video-to-audio' \
--header 'Authorization: Bearer YOUR_API_KEY' \
--header 'Content-Type: application/json' \
--data '{
"model_name": "kling-v3",
"video_url": "https://example.com/input.mp4",
"prompt": "生成与画面动作同步的自然环境音"
}'