Kling 4.0 Flash Video Generator
Build cinematic footage up to 30 seconds in 4K — feed the Kling 4.0 Flash Video Generator a prompt, stills or clips and get matched multilingual voices back.
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What Sets the Kling 4.0 Flash Video Generator Apart
Whether you start with words, a still image or a short clip, the tool assembles up to half a minute of footage and keeps every spoken line aligned with the action.
- Where the Model Comes FromThis engine is Kuaishou's successor to the 3.0 and 3.0 Turbo releases, and it accepts written prompts, still frames and reference media as starting points.
- One Run, 3–30 Seconds, Output from 720p to 4KA single run covers anything between three and thirty seconds, delivered in 720p, 1080p or 4K, with room for 10 keyframes and 15 Omni Reference inputs.
- One Pipeline for Pictures and VoicesVisual assets and voice samples share the same workspace, which is what lets dialogue in any language land on the right beat of the picture.
Kling 4.0 Flash Video Generator: Three Moves to a Finished Clip
Bring in your assets, describe what should happen, and review the first pass before extending the story.
Everything the Kling 4.0 Flash Video Generator Puts in Your Hands
Half-minute scenes, a single shared budget of reference inputs, and spoken lines that track the on-screen action.
Clips That Run as Long as 30 Seconds
One pass is enough for a complete beat — the setup, the turn and the payoff. If the narrative needs more room, keep going through the extension route rather than squeezing the idea down.
Resolution Choices Up to 4K
Choose 720p, 1080p or 4K, then match the frame to wherever it will live: 21:9, 16:9, 1:1, 9:16 or Auto, whether that's a vertical social post or a widescreen product demo.
A Pool of 15 Reference Assets
Stills, video, voice samples and subject elements all count against the same limit of 15. Inside that budget you may load 10 photos, 5 clips totalling 30 seconds, or 7 subject elements.
Voice References Across Many Languages
Assign a voice sample to every speaker and the finished file comes back in two-channel stereo, with each line fitted to the movement on screen, whatever the language.
Fine Control with 10 Keyframes
Pin down the beats that carry the story — a shift in expression, a turn of events, the opening and closing frames — using as many as 10 stills within a 3–30-second clip.
Surgical Edits on Existing Footage
Upload up to 5 clips, naming one as the primary, to rework a face, a gesture, the background or the overall grade. Each clip lasts 3–30 seconds and the combined length must remain below 30.
Kling 4.0 Flash Video Generator: Common Questions Answered
Coverage, limits on inputs, and the details worth checking before you press Generate.
What is the maximum length of a single Kling 4.0 render?
One render spans three seconds at the low end and thirty at the top. Longer sequences come from chaining extensions, so treat each additional segment as a separate pass and check what continuation options your plan includes.
How are the reference inputs counted?
All inputs share one ceiling of fifteen. Photos max out at 10, video at 5 clips totalling 30 seconds, subject elements at 7 — and every item you add is deducted from the same pool of fifteen rather than adding to it.
Do voice samples support dialogue in several languages?
Yes. Each sample shapes how a subject sounds and takes up one of the fifteen slots, working alongside cross-language lip and audio alignment. Watch the export back to confirm the timing of every line.
Can I edit video I already own?
You can. The tool accepts as many as 5 clips with one marked as the primary; each individual clip must fall between three and thirty seconds, and their combined runtime cannot exceed thirty.
What is the keyframe image limit?
No more than ten. Place them on the moments that matter — a gesture, a change of scene, an expression — while keeping the subject and the lighting consistent across every frame you supply.
How do I find out what a render will cost in credits?
Renders draw on the Kling Motion Control credits sitting in your account. The number shown on the Generate button updates whenever you adjust a setting, so check it before you confirm.
Bring Your Next Scene to Life with the Kling 4.0 Flash Video Generator
Head to the panel above, drop in your references, and review the credit estimate and terms displayed before downloading your finished video.