falImage to videoComing soon

kling/v4/image-to-video

Name: kling/v4/image-to-video
Brand: fal

kling/v4/image-to-video is an image to video tool from fal that runs in the background and returns video. Coming soon: listed with its price, not yet open to runs.

This tool is listed but not yet available to run.

Priced by usage

Pricing

$0.2041 per second. Billed on duration, default 5. The final charge comes from usage.

Limits

Runs: In the background
Returns: video
Longest queue wait: 3600s
Run deadline: 3600s
Largest inline input: 1024 KB
Largest input file: 500 MB
Largest output: 4768 MB
Outputs per run: 16

Input

Field	Kind	Default	Description
`prompt`	text	—	Text prompt. Either prompt or multi_prompt must be provided.
`start_image_url` required	URL or file	—	Image to use as the first frame of the video. Max file size: 30.0MB, Min width: 300px, Min height: 300px, Min aspect ratio: 0.40, Max aspect ratio: 2.50, Timeout: 20.0s
`end_image_url`	URL or file	—	Image to use as the last frame of the video.
`multi_prompt`	JSON	—	Per-shot prompts for multi-shot generation. The video duration is the sum of the shot durations.
`duration`	number (whole) 3 to 30	5	Video duration in seconds (3-30).
`resolution`	one of 720p, 1080p	1080p	Output resolution.

Same request in code

curl https://api.spiral.ai/v1/runs \
  -H "Authorization: Bearer $SPIRAL_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
    "provider": "fal",
    "model": "kling/v4/image-to-video",
    "input": {
      "start_image_url": "https://v3b.fal.media/files/b/rabbit/NaslJIC7F2WodS6DFZRRJ.png"
    }
  }'