Kling 4.0 Flash Video Generator
Turn a written brief or a still image into smooth 4K video with Kling 4.0 Flash Video Generator — 30-second scenes, synced voices, no editing skills.
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Why Creators Choose Kling 4.0 Flash
Hand it a written brief or a single photo and it returns anything from three seconds to half a minute of footage, with speech and picture locked together in every language you need.
- An Engine Built by KuaishouThis model comes from Kuaishou and follows Kling 3.0 and 3.0 Turbo. It reads written prompts, still frames and reference material, then renders a finished shot in a single pass.
- Anywhere From 3 to 30 Seconds, Up to 4KEach run spans three seconds to thirty and renders at 720p, 1080p or 4K. Up to ten keyframes and fifteen Omni Reference inputs steer how the shot unfolds on screen.
- One Workspace for Visual and Voice InputsPicture assets and spoken samples sit inside the same panel, so dialogue in any language lands on the right beat instead of drifting away from the visuals.
From Brief to Finished Clip in Three Moves
Bring your references, describe the shot, then review the first draft before you extend the scene.
Core Strengths of This AI Video Engine
Half-minute scenes, one shared budget of reference inputs, and speech that tracks the picture frame for frame.
Run Times Up to 30 Seconds
A single pass holds a complete beat — setup, action and payoff. If the story needs more room, continue it through the extension flow rather than squeezing the idea into one shot.
Output All the Way to 4K
Choose 720p, 1080p or 4K and frame for wherever it lands: 21:9, 16:9, 1:1, 9:16 or Auto, from a vertical social cut to a widescreen product reveal.
Fifteen Reference Slots to Share
Stills, footage, voices and subject elements all draw from one ceiling of fifteen — up to 10 images, 5 clips totalling 30 seconds, or 7 subject elements, not stacked on top of each other.
Dialogue Across Multiple Languages
Assign a voice sample to each speaker and the render comes back in two-channel stereo, with speech aligned to the on-screen action whatever the language.
Ten Keyframes to Anchor the Action
Pin the moments that matter — an expression shift, a turn in the scene, the opening and closing frame — with up to 10 stills across a 3–30-second run.
Surgical Edits on Existing Footage
Bring in up to 5 clips, one marked as primary, to rework a face, a gesture, a backdrop or a look. Each runs 3–30 seconds and the combined total stays under 30.
Common Questions About Kling 4.0 Flash Video Generator
How far one run reaches, how the input ceilings stack, and what to check before you spend credits.
What is the maximum length of one run?
A single pass covers three to thirty seconds. Anything longer belongs to the extension flow, so check the continuation options on your plan instead of counting an extended piece as one generation.
How do the reference limits add up?
Fifteen inputs is the shared ceiling. Stills stop at 10, footage at 5 clips totalling 30 seconds, subject elements at 7 — and every one of those draws from the same fifteen rather than stacking on top.
Can voice samples drive dialogue in other languages?
Yes. A voice sample shapes how a subject sounds, takes one of the fifteen slots, and works with cross-language lip and audio matching. Play the result back to confirm where each line lands.
Can it rework footage I already own?
It can. Up to 5 clips go in, one flagged as primary, each between three and thirty seconds. Added together they must stay inside the thirty-second total.
How many keyframe stills are allowed?
Ten at most. Use them to mark the beats you care about — a pose, a scene shift, a change of expression — and keep the subject and lighting reading consistently between frames.
Where is the credit cost shown?
Runs are paid for with the Kling Motion Control credits already in your account. The number sits on the Generate button and updates as you adjust settings, so read it before you commit.
Start Creating With the Kling 4.0 Flash Video Generator
Open the panel, load your references, and review the credit cost plus usage terms before you export the finished clip.