curl https://buble.ai/api/v1/generations \
  -H "Authorization: Bearer $BUBLE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google/veo3.1-fast",
    "mode": "frames_to_video",
    "prompt": "Create an elegant transformation from the first frame to the final frame with smooth cinematic camera movement and realistic lighting continuity",
    "start_frame": "https://example.com/start.png",
    "end_frame": "https://example.com/end.png",
    "duration": "8s",
    "resolution": "720p",
    "aspect_ratio": "16:9"
  }'