falVideo to videoComing soon

fal-ai/lightx/relight

Name: fal-ai/lightx/relight
Brand: fal

fal-ai/lightx/relight is a video 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

$0.13 per second. Measured from the input file. The final charge comes from usage.

Limits

Runs: In the background
Returns: video
Longest queue wait: 3600s
Run deadline: 1800s
Largest inline input: 1024 KB
Largest input file: 500 MB
Largest output: 4768 MB
Outputs per run: 16

Input

Field	Kind	Default	Description
`video_url` required	URL or file	—	URL of the input video.
`prompt`	text	—	Optional text prompt. If omitted, Light-X will auto-caption the video.
`seed`	number (whole)	—	Random seed for reproducibility. If None, a random seed is chosen.
`relit_cond_type`	one of ic, ref, hdr, bg	ic	Relight condition type.
`relight_parameters`	JSON	—	Relighting parameters (required for relight_condition_type='ic'). Not used for 'bg' (which expects a background image URL instead).
`relit_cond_img_url`	text	—	URL of conditioning image. Required for relight_condition_type='ref'/'hdr'. Also required for relight_condition_type='bg' (background image).
`ref_id`	number (whole) 0 to 48	0	Frame index to use as reference to relight the video with reference. Must be less than the number of generated frames (default 49).

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": "fal-ai/lightx/relight",
    "input": {
      "video_url": "https://storage.googleapis.com/falserverless/example_inputs/lightx_video.mp4"
    }
  }'