Kling 4.0 Flash Video Generator
Spin a written idea or a single still into 3–30 seconds of 4K footage — the Kling 4.0 Flash Video Generator syncs every spoken line to the picture.
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Kling 4.0 Flash Video Generator: What You Actually Get
Start from a written brief, a still image or a voice sample — the tool returns a clip of three to thirty seconds whose speech tracks the on-screen action.
- Built by Kuaishou, Tuned for Real FootageThis generation of the model accepts written briefs, still frames and reference clips as starting points, and follows the earlier Kling releases from the same team.
- Anywhere from Three Seconds to Half a Minute, in One PassA single run delivers a clip of three to thirty seconds at 720p, 1080p or 4K, with as many as ten keyframes and fifteen reference inputs steering the outcome.
- Picture and Voice Inputs Share One WorkflowVisual assets and voice samples sit in the same reference pool, which lets dialogue in any supported language match the movement happening on screen.
Three Steps to Your First Kling 4.0 Flash Video Generator Clip
Bring in your references, describe what should happen, then review the take before you push the story further.
Core Capabilities of the Kling 4.0 Flash Video Generator
Half-minute scenes, a single shared budget of reference material, and speech that keeps pace with the visuals.
Scenes Up to 30 Seconds Long
One pass holds a complete beat — the setup, the turn and the close. If the narrative runs longer, carry it forward with the extension flow rather than squeezing the idea.
Resolution Up to 4K
Choose 720p, 1080p or 4K, then frame for wherever it lands — 21:9, 16:9, 1:1, 9:16 or Auto, whether that is a phone-first social edit or a wide product reel.
Fifteen Reference Slots to Fill
Stills, footage, voices and subject elements all pull from the same pool of fifteen. Inside that budget you can take up to ten images, five clips totalling thirty seconds, or seven subject elements.
Voices in Multiple Languages
Hand every speaker a voice sample and the render comes back in two-channel stereo, with the delivery aligned to the picture no matter the language.
Ten Keyframes Under Your Control
Pin the beats that carry weight — a shift in expression, a turn in the action, the opening and closing frame — using as many as ten stills across a three-to-thirty-second run.
Surgical Edits on Existing Footage
Load up to five clips, naming one as the primary, to rework a face, a gesture, a background or a grade. Each clip sits between three and thirty seconds and the combined length stays under thirty.
Kling 4.0 Flash Video Generator: Common Questions Answered
What the model can handle, how the reference caps add up, and what to check before you hit generate.
What is the longest single Kling 4.0 render?
One job spans three to thirty seconds. Longer sequences come from the extension flow, so check what continuation options your plan includes instead of treating a stitched result as a single render.
How do the reference caps add up?
Everything draws from one pool of fifteen. Images top out at ten, footage at five clips totalling thirty seconds, subject elements at seven — and none of those sit on top of the fifteen; they come out of it.
Will voice references handle other languages?
Yes. A voice sample shapes how a subject sounds, uses one of the fifteen slots, and works alongside cross-language lip and audio alignment. Watch the render back to confirm where each line lands.
Can I rework clips I already own?
You can. Five clips is the maximum, with one flagged as primary, and each needs to fall between three and thirty seconds. Combined, they must not exceed the thirty-second ceiling.
What is the keyframe image limit?
Ten, at most. Spend them on the moments that matter — a pose, a scene transition, a change of expression — and keep the subject and lighting consistent from one frame to the next.
Where can I check the credit cost?
Runs on this page draw on the Kling Motion Control credits sitting in your account. The amount shows on the Generate button and updates whenever you adjust a setting, so glance at it before confirming.
Give the Kling 4.0 Flash Video Generator a Real Brief
Head to the panel, load your references and check the credit figure and terms on screen before you download the finished cut.