Kling 4.0 Flash Video Generator
One prompt is all it takes: the Kling 4.0 Flash Video Generator renders cinematic 4K scenes up to 30 seconds long with matched dialogue.
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What You Get with the Kling 4.0 Flash Video Generator
Feed it written direction or a still frame, choose a length between three and thirty seconds, and let speech and picture stay locked together in any language.
- The Engine Behind It: Kuaishou's Kling 4.0This model comes from Kuaishou and follows the Kling 3.0 line. It reads written direction, still frames and reference material, then assembles them into motion.
- One Run, Three Seconds to Thirty, Up to 4KAsk for a brief beat or a full half-minute and the render lands at 720p, 1080p or 4K. As many as 10 keyframes and 15 reference inputs help shape the result.
- One Workspace for Pictures and VoicesVisual assets and audio samples sit inside the same workflow, which is how spoken lines in different languages end up matched to the action on screen.
Your First Kling 4.0 Flash Video Generator Clip in Three Steps
Bring in your assets, describe the moment you want, then review the first pass before extending the scene.
Core Strengths of the Kling 4.0 Flash Video Generator
Half-minute sequences, a single pool of reference material, and speech that never drifts away from the visuals.
Runs of Up to Thirty Seconds
One pass is enough for a complete moment — the opening, the turn and the close. If the idea needs breathing room, keep going through the extension flow rather than squeezing it down.
Output That Reaches 4K
Choose 720p, 1080p or 4K, then set the frame for where it will live: 21:9, 16:9, 1:1, 9:16 or Auto — a tall social post or a wide brand film.
Fifteen Reference Slots to Work With
Stills, clips, voices and subject pieces all come out of the same allowance of fifteen. Inside that budget you may place 10 photos, 5 video clips totalling 30 seconds, or 7 subject elements.
Voices in Multiple Languages
Hand each character a voice clip and the finished file returns in two-channel stereo, with the spoken words tracking the on-screen movement in whichever language you picked.
Ten Keyframes to Pin Down
Lock the beats you care about — an expression shift, a turn in the story, the opening and closing frames — using as many as 10 stills across a run of three to thirty seconds.
Editing Aimed at Specific Details
Bring up to 5 clips, designating one as the lead, to rework a face, a movement, a backdrop or a colour grade. Each clip lasts 3–30 seconds and the combined length stays under thirty.
Frequently Asked Questions About the Kling 4.0 Flash Video Generator
How far the model reaches, how the input limits combine, and what to check before pressing generate.
What is the longest single Kling 4.0 render?
One pass stretches from three seconds to thirty. Longer material has to come from the extension feature, so treat a continued sequence as more than one run rather than a single render.
In what way do the reference caps combine?
Everything draws on one pool of fifteen. Within it, photos are limited to 10, video to 5 clips whose combined length is 30 seconds, and subject elements to 7 — these come out of the same fifteen, they do not add to it.
Will voice samples handle dialogue in other languages?
Yes. A sample shapes how a character sounds and uses one of your fifteen slots, and it works alongside cross-language lip-sync and audio matching. Play the clip back to confirm the timing of every line.
Can it rework footage I already own?
It can. You may supply 5 clips, naming one as the lead, and each must fall between three and thirty seconds. Their combined duration cannot exceed thirty seconds.
What is the keyframe image limit?
No more than ten. Reserve them for the moments that matter — a pose, a scene transition, a new expression — and keep the subject and the lighting consistent from one frame to the next.
Where can I check the credit cost?
This tool draws 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 you start.
Start Creating with the Kling 4.0 Flash Video Generator
Head to the panel above, drop in your reference assets and check the credit figure and terms displayed before you download the finished video.