Runway API v1 updates:

  • POST gen4_5/create now supports Image-to-Video (I2V)
    • Use firstImage_assetId parameter to generate video from an image
    • Supports all aspect ratios: 16:9, 9:16, 1:1, 4:3, 3:4, 21:9
    • Duration options: 5 (default), 8, 10 seconds

Source Image:

Request:

curl --location 'https://api.useapi.net/v1/runwayml/gen4_5/create' \
  --header 'Authorization: Bearer user:12345-…' \
  --data-urlencode 'seconds=8' \
  --data-urlencode 'text_prompt=Epic close-up of an ornate golden warrior helmet with intricate engravings. The camera pulls back in a dramatic zoom-out as the armored figure draws a sleek glowing energy sword. The blade ignites with crackling white light, casting a flickering cold glow onto the golden faceplate. Hyper-realistic metallic reflections, cinematic lighting, continuous shot.' \
  --data-urlencode 'firstImage_assetId=user:12345-runwayml:[email protected]:…' \
  --data-urlencode 'aspect_ratio=9:16'

Result: