Kling Video 4.0 Video Edit

Kling Video 4.0 Video Edit Overview

Kling Video 4.0 Video Edit transforms an existing source video using a required editing prompt and optional references. This Kling model belongs to the kling-v4 family and is available through each::labs. The request identifies exactly one base_video as the footage to edit, while additional assets can provide visual or voice guidance. It is a source-video workflow rather than a request to generate from text alone.

Provide a nonempty prompt and a videos array containing exactly one base_video. Add optional feature_video, image, Element or voice references, then set duration, resolution and aspect_ratio. The model supports output durations from 3 to 30 seconds at 720p or 1080p. Use it for short creative clips, concept development and application workflows where the requested motion can be described clearly. Review each result for the details that matter to your project before treating it as a final asset.

Capabilities

• Transform a source video with a required text editing prompt.
• Identify exactly one base_video and optionally add feature_video references.
• Add up to ten image keyframes or reference images using structured roles.
• Supply existing Element references, with at most three Video Character Elements.
• Include up to three existing custom or system voice references.
• Request 3–30 second output at 720p or 1080p.
• Use adaptive framing or choose 21:9, 16:9, 9:16 or 1:1 output.

Use Cases for Kling Video 4.0 Video Edit

Creators can explore visual treatments for existing footage. For example, "Transform the source into a pencil-sketch look while keeping the subject’s action recognizable" communicates both an intended change and a preservation goal.

Marketers can develop alternative campaign looks from one source clip. "Give the scene warm evening lighting and keep the product prominent" provides a focused starting point. Inspect the output for unintended changes to product appearance before using it publicly.

Designers can combine source footage with reference images to communicate a desired direction. Assign clear reference ids and explain which asset supplies the desired appearance instead of assuming that the system knows each upload’s role.

Developers can expose a prompt-driven editing step in an existing video workflow. The Kling Video 4.0 Video Edit API separates the base clip from supporting references, making source selection explicit in the request.

Tips and Tricks

State the change first, then name the source details that should remain recognizable. Keep the initial edit narrow so you can tell whether the instruction had the intended effect before adding more references.

For a visual treatment, try: "Transform the source clip into a soft pencil-sketch style. Keep the main subject and overall camera movement recognizable." For a scene adjustment: "Give the source scene warm sunset lighting while keeping the subject’s action and the camera direction consistent."

Use exactly one base_video and label extra clips as feature_video. Give referenced assets unique ids and explain how they should influence the edit. Keep the requested duration aligned with the source where practical, and check the finished result for altered faces, object shapes and unintended visual changes.

Technical Specifications

• Output: generated video; the integration maps successful results from video_url.
• Duration: integer seconds from 3 through 30; default 10 seconds.
• Resolution: 720p or 1080p; default 1080p.
• Required inputs: prompt and videos, containing exactly one base_video.
• Video media: MP4/MOV; 300 MB maximum each, 3–30 seconds, 24–60 fps, dimensions 700–4553 pixels, at most 8,294,400 pixels.
• Optional references: images, feature_video entries, existing Elements and existing voice IDs.
• Aspect ratios: adaptive by default; also 21:9, 16:9, 9:16 and 1:1.
• Prompt limits: up to 26,000 English-only or 11,000 non-English-only characters; mixed-language prompts use a weighted limit enforced by Kling.
• Processing: asynchronous; no fixed completion time is published in the current catalog. No configurable codec or output frame rate is exposed.

Things to Be Aware Of

This is generative video editing, not a guarantee that every unmentioned source detail stays unchanged. Review the whole clip, especially faces, hands, lettering and important product features. Keep the source and all supporting URLs available during processing. Combined reference counts and actual media properties are checked by the provider. A successful schema check alone does not prove that every source file or existing Element ID will be accepted.

Respect the provider’s language-weighted prompt limit and submit only fields exposed by the input schema. Check the final clip rather than relying on the prompt alone.

Key Considerations

Provide exactly one base_video and describe what should change. Framing defaults to adaptive. Keep source and reference URLs accessible during processing, and check the video media limits before submitting.

Catalog estimates are $0.188 per output second at 720p and $0.282 at 1080p. Input seconds beyond the output duration add an estimated $0.094 each at 720p or $0.141 each at 1080p. Final charges use the provider-reported deduction or balance list price, rather than a flat per-request fee. Use only assets you are entitled to submit.

Limitations

A prompt and at least one video are required, with exactly one base_video. The task supports at most five videos, including the contribution from Video Character Elements, and at most 15 total references. Associated video durations must meet the combined 3–30 second constraint. Output is limited to 720p or 1080p. Precise cuts, exact source preservation and deterministic edits are not guaranteed by this integration. Check important details before publication.