透明背景输出

curl -X POST "https://apis.viggle.ai/v1/renders" \
  -H "Authorization: Bearer $VIGGLE_API_KEY" \
  -F "[email protected]" \
  -F "[email protected]" \
  -F "background_mode=transparent"

{
  "status": "ready",
  "video_url": "https://...",
  "alpha_url": "https://..."
}