Kling 4.0 Reference-to-Video (FAL)

{
  "model": "fal-kling-v4-ref2v",
  "prompt": "A cinematic drone shot over a coastal city at sunset",
  "duration": 3,
  "resolution": "720p",
  "image_url": "https://example.com/start-frame.jpg"
}

curl -X POST https://kunya.ai/api/v1/videos/generations \
  -H "Authorization: Bearer kunya_YOUR_API_KEY" \
  -H "Content-Type: application/json"
  -d '{"model":"fal-kling-v4-ref2v","prompt":"A cinematic drone shot over a coastal city at sunset","duration":3,"resolution":"720p","image_url":"https://example.com/start-frame.jpg"}'