Kling 4.0 Flash Video Generator
Kling 4.0 Flash Video Generator produces 3–30 second 4K video from a written idea or a photo, with 15 Omni Reference slots and multilingual voice sync.
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A Closer Look at What Kling 4.0 Flash Video Generator Can Do
Written ideas, still photos and reference clips all feed the same timeline, producing anything from three seconds to half a minute with speech that tracks the action.
- Built by Kuaishou on the Kling 4.0 EngineThis generation engine comes from Kuaishou and accepts written briefs, still frames and reference footage, following on from the earlier Kling 3.0 and Kling 3.0 Turbo releases.
- One Run Covers 3–30 Seconds at 720p, 1080p or 4KA single submission yields clips anywhere between three and thirty seconds long, delivered in your chosen resolution and guided by up to ten keyframes alongside fifteen Omni Reference entries.
- Omni Reference Unites Visual and Vocal InputsBoth imagery and speech samples sit in the same reference pool, which lets dialogue in any supported language stay locked to the on-screen action.
Three Simple Steps with the Kling 4.0 Flash Video Generator
Bring in your source files, describe the moment you want, and review the first cut before extending it.
Core Capabilities of the Kling 4.0 Flash Video Generator
Half-minute sequences, a single combined reference pool, and speech that never drifts away from the visuals.
Clips Running as Long as 30 Seconds
One submission holds a complete beat — the opening, the key action and the resolution. If the narrative outgrows it, keep going through the extension flow rather than squeezing the idea.
Resolution Options Through 4K
Choose 720p, 1080p or 4K and match the frame to where it will play — 21:9, 16:9, 1:1, 9:16 or Auto, whether that means a vertical social post or a wide product demo.
Fifteen Reference Assets in One Pool
Stills, video, voice samples and subject elements all share the same limit of fifteen. Inside that budget you may use ten images, five clips totalling thirty seconds, or seven subject elements.
Voices and Audio Across Languages
Assign a voice sample to every speaker and the finished file comes back in two-channel stereo, with each line matched to the movement on screen regardless of language.
Ten Keyframes for Precise Control
Pin down the beats that carry weight — a shift in expression, a turn in the story, the opening and closing frame — using as many as ten stills across a clip of three to thirty seconds.
Editing That Targets Specific Details
Supply up to five clips, naming one as the primary, to adjust a face, a gesture, a background or a colour grade. Each clip spans three to thirty seconds and together they must stay under thirty.
Kling 4.0 Flash Video Generator — Frequently Asked Questions
How far the model reaches, how the various input limits interact, and what to verify before starting a render.
What is the maximum length of a single Kling 4.0 render?
One submission spans anywhere from three to thirty seconds. Longer pieces come from the extension flow, so check which continuation options your service provides instead of treating an extended result as a single run.
What rules apply to the reference limits?
Fifteen entries is the overall cap. Images top out at ten, video at five clips summing to thirty seconds, and subject elements at seven — and each category is carved out of that same fifteen rather than added on top.
Do voice references support dialogue in other languages?
Yes. A voice sample shapes how a subject sounds, takes up one of the fifteen slots, and works together with cross-language lip-sync and audio alignment. Play the finished clip back to confirm each line lands correctly.
Can I edit existing footage with Kling 4.0?
You can. Five clips may be submitted, with one marked as the primary, and every clip needs to fall between three and thirty seconds. Combined, they still have to fit inside the thirty-second ceiling.
What is the keyframe image limit?
Ten, at most. Place them on the moments that matter — a pose, a scene transition, a shift in expression — and keep the subject and the lighting consistent from one frame to the next.
How do I find out the credit cost?
This tool draws on the Kling Motion Control credits already sitting in your account. The number shows on the Generate button and updates whenever you adjust settings, so review it before you confirm.
Start Creating with the Kling 4.0 Flash Video Generator
Head to the panel above, upload your reference files, and check the displayed credit cost and usage terms before downloading the final clip.