Can I upload opening and closing frames?

Image-to-video uses a single opening frame. Describe the intended ending in the prompt.

Does Flash export at 1080p?

The Flash generator outputs 720p. Regular generation supports 3–20 seconds.

Can I make vertical or ultrawide video?

Text and reference modes offer 16:9, 9:16, 1:1 and 21:9. Image-to-video and edit follow the input framing.

How are opening-frame and reference modes different?

The opening frame sets the start of the shot. Reference mode lets media guide subject, style or motion.

Does editing change the duration?

The site’s edit mode follows the source length.

How should I describe a camera move?

Specify the subject action, camera direction and speed. For example, slide slowly right with the product centered.

How does reference video affect credits?

Without input video the quote follows output seconds. Reference video and editing also account for input duration.

Can I add narration in the Flash generator?

The generator has no new-audio control. Video editing retains the source audio.

Kling 4.0 Flash

Use Kling 4.0 Flash for short product shots, subject movement and camera tests. Choose a 3–20 second clip at 720p.

Generation mode

Text-to-Video / Image-to-Video / Reference-to-Video / Video-to-Video

Duration

3s / 4s / 5s / 6s / 7s / 8s / 9s / 10s / 11s / 12s / 13s / 14s / 15s / 16s / 17s / 18s / 19s / 20s

Resolution

720p

Aspect ratio

16:9 / 9:16 / 1:1 / 21:9

Reference image

10 · JPEG / PNG · 10 MB

Reference video URL

MP4 / MOV · 200 MB

Prompt (max)

2500

About

What this model is for

Use Kling 4.0 Flash for short product shots, subject movement and camera tests. Choose a 3–20 second clip at 720p.

Generation mode

Set the opening frame

Start image-to-video with one clear frame and describe the next movement.

Build one action per shot

Make 3–20 second clips at 720p. Try one product turn, character entrance or camera slide at a time.

Pick a format for the cut

Text and reference generation offer 16:9, 9:16, 1:1 and 21:9.

Separate look from movement

Use an image for subject or styling and a video to guide action or pacing.

Edit within the existing shot

Name what should change in the source clip. The workspace follows the source duration and framing.

Check the duration-based quote

A reference video changes the billable duration. Review credits in the generator before submitting.

How to use

01 · Plan a useful first test

Describe subject movement, camera direction, visual continuity and intended clip purpose.

Text-to-Video / Image-to-Video / Reference-to-Video / Video Edit

02 · Settings

Image-to-video accepts the opening frame only. Edit mode follows the source clip.

Duration · 3–20 s · Resolution · 720p · Aspect ratio · 16:9 / 9:16 / 1:1 / 21:9

03 · Generate / Download

The generator shows the site credits for your settings before you submit.

Inspect motion continuity, object consistency, camera stability, reference fidelity and audio if present. A promotional clip does not establish the result of your prompt or a guaranteed generation time.

What to make

Vertical product clips

Animate a single pack shot for a short social clip with one clear camera move.

Motion drafts for editing

Test a product turn or camera slide in 720p before assembling several cuts.

FAQ

Kling 4.0 Flash · Frequently asked questions

Kling 4.0 Flash FAQ

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Choose your settings below to create with this model.

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