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Kling 4.0 Reference to Video

All video to video models

Kling 4.0 generates videos from text prompts and image or video references at 720p or 1080p, with durations from 3 to 30 seconds and per-shot prompts.

Inference$ Commercial useFrom 53 credits per run

About Kling 4.0 Reference to Video

Kling 4.0 generates videos from text prompts and image or video references at 720p or 1080p, with durations from 3 to 30 seconds and per-shot prompts.

reference-to-videomulti-shotimage-referencevideo-referencekling

Pricing

A run with the default settings costs 53 credits. The exact cost updates in the playground as you change settings, and you're only charged when you press Run. Failed runs are refunded automatically.

Inputs

prompttextarea

Text prompt. Reference inputs as @Image1, @Video1, @Element1, etc. Either prompt or multi_prompt must be provided.

multi_promptjson

Per-shot prompts for multi-shot generation. The video duration is the sum of the shot durations.

durationintegerdefault: 5

Video duration in seconds (3-30).

start_image_urlfile

Optional image to use as the first frame. Counts toward the image reference limit.

middle_image_urlsfile-list

Optional ordered keyframes between the first and last frames (max 8). Count toward the image reference limit.

end_image_urlfile

Optional image to use as the last frame. Counts toward the image reference limit.

image_urlsfile-list

Reference images, referenced as @Image1, @Image2, ... (max 10).

video_urlsfile-list

Reference videos (3-30s each, 30s combined with element videos), referenced as @Video1, @Video2, ... (max 5).

elementsjson

Characters/objects, referenced as @Element1, @Element2, ... (max 7). Up to 3 elements may carry a voice_id and up to 3 may be video elements.

voice_idsstring-list

Voices referenced in the prompt as @Voice1, @Voice2, ... (max 3, including voices bound to elements). Create one with https://fal.ai/models/fal-ai/kling-video/create-voice

resolutionselectdefault: "1080p"

Output resolution.

Options: 720p, 1080p

aspect_ratioselectdefault: "16:9"

Aspect ratio of the generated video. 'auto' adapts it to the references.

Options: auto, 16:9, 9:16, 1:1, 21:9

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