GET

/v1/schemas/fal/video/bytedance%2Flynx

kind inputactivity videohash 35c3f0b9extracted Jul 6, 2026version currentsource upstream spec ↗

Request body

13 properties · 2 required · 0 $defs
propertytypedescriptionconstraints
image_url*stringThe URL of the subject image to be used for video generation
prompt*stringText prompt to guide video generation
guidance_scale_2numberImage guidance scale. Controls how closely the generated video follows the reference image. Higher values increase adherence to the reference image but may decrease quality.0 ≤ n ≤ 10 · default: 2
num_inference_stepsintegerNumber of inference steps for sampling. Higher values give better quality but take longer.1 ≤ n ≤ 75 · default: 50
num_framesintegerNumber of frames in the generated video. Must be between 9 to 100.9 ≤ n ≤ 81 · default: 81
negative_promptstringNegative prompt to guide what should not appear in the generated videodefault: "Bright tones, overexposed, blur…
aspect_ratioenumAspect ratio of the generated video (16:9, 9:16, or 1:1)16:9 | 9:16 | 1:1 · default: "16:9"
guidance_scalenumberClassifier-free guidance scale. Higher values give better adherence to the prompt but may decrease quality.1 ≤ n ≤ 20 · default: 5
frames_per_secondintegerFrames per second of the generated video. Must be between 5 to 30.5 ≤ n ≤ 30 · default: 16
resolutionenumResolution of the generated video (480p, 580p, or 720p)480p | 580p | 720p · default: "720p"
strengthnumberReference image scale. Controls the influence of the reference image on the generated video.0 ≤ n ≤ 2 · default: 1
seedintegerRandom seed for reproducibility. If None, a random seed is chosen.nullable
ip_scalenumberIdentity preservation scale. Controls how closely the generated video preserves the subject's identity from the reference image.0 ≤ n ≤ 2 · default: 1

Validate a payload

before you spend tokens
shell
$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"fal","endpointId":"bytedance/lynx","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}