AI Video Prompt
Generator.
Free builder for AI video prompts. Sora, Runway, Veo 3, Kling, Luma, Pika. Single, shot list, and director brief formats.
Camera, motion, duration, audio. Every lever that separates a good clip from an unusable one.
Describe what you want
3 prompt variations
Click Copy to use[describe the video concept] Shot: slow dolly in. Duration: 5 seconds. Motion: moderate.
# SCENE [describe the video concept] # SHOT 1 (0-2s) Open on slow dolly in. Establish the subject and setting. # SHOT 2 (2-4s) moderate (character walking, camera dolly) through the scene. The key action or gesture plays out.
CONCEPT [describe the video concept] CAMERA Slow dolly in. Movement is moderate (character walking, camera dolly). RUNTIME 5 seconds (one beat) LIGHT & MOOD Define lighting based on the scene's emotional beat. CONTINUITY Character proportions and face identity remain stable. No morphing. Physics feels grounded.
Under the hood
Why video prompting is harder than image prompting.
Video adds a time dimension. Every frame must be consistent with the next and with a coherent story beat. One bad frame wrecks the clip. Image prompting only has to produce one good frame.
Beyond 10 seconds, break the prompt into shot beats. Each beat gets its own motion cue. This staggers the model's attention and prevents the 'everything happens at once' failure mode.
Veo 3 added native audio in 2025 and the bar jumped. If your clip needs sound, Veo 3 is the current default. Silent video still wins on visual quality but is functionally incomplete.
Related free tools
Specialized generators for specific tasks.
FAQ
Questions about AI video prompting.
Which AI video model should I pick?+
Sora leads on motion coherence and complex scenes. Veo 3 is the only major model generating native synchronised audio. Runway Gen-3 and Gen-4 shine on image-to-video and style control. Kling is strongest for physical realism. Luma Dream Machine is the cheapest for fast iteration. Pick Sora for ambition, Veo 3 for audio, Runway for image-conditioned, Kling for physics.
What is the difference between the three variants?+
Single paragraph is for short 5 to 10 second clips where the model needs one coherent concept. Shot list breaks longer videos into 2-second beats so the model staggers its motion. Director-style brief adds continuity notes, camera language, and production-grade framing. Start with single, move to shot list for anything past 10 seconds, and use directorial for final hero pieces.
How long can the video be?+
Varies by model. Sora generates up to 20 seconds at 1080p in a single generation. Runway Gen-3 defaults to 5 or 10 seconds and can extend. Veo 3 produces 8-second clips natively. Kling handles 5 to 10 seconds. For anything longer, stitch multiple generations together in an edit. AI video is still shot-by-shot work, not single-take feature filmmaking.
Why do AI videos still have morphing faces and weird limbs?+
Motion models trade spatial consistency for temporal coherence. The longer the clip, the harder it is to keep identity stable. Mitigations: shorter clips, describe the subject in stable terms like clothing and posture, use image-to-video with a locked first frame, and explicitly include 'no morphing, stable identity' in the prompt. Face consistency across shots is still an unsolved problem.
How does audio generation work?+
Veo 3 is the only major consumer model that generates synchronised audio natively. You describe the audio in the prompt (ambient market chatter, single footstep on gravel, a character saying hello) and Veo 3 produces audio aligned with the visual. Sora, Runway, and Kling output silent video, so you add audio in post or with a separate model like ElevenLabs.
Can I use an image as the starting frame?+
Runway Gen-3 and Gen-4 are best at this, called image-to-video. You upload a first frame and the prompt describes the motion. This is the most reliable way to get a specific character or scene. Sora supports image-to-video too. For full text-to-video, Sora and Veo 3 lead. For brand and product work, image-to-video is usually the right tool.
What does motion density mean?+
Subtle motion is breathing, hair swaying, a candle flickering. Moderate is a character walking or a camera dolly. Heavy is action, chase scenes, fast cuts. Higher density is harder for the model. Subtle motion produces the most stable, shareable clips. Start subtle, go heavy only when the concept demands it.
Can I do dialogue and lip sync?+
Veo 3 does lip sync natively for short lines. Other models produce silent video and you sync audio in post using tools like Wav2Lip or Sync.so. Complex dialogue across multiple cuts is not yet a solved problem. For product explainers and short clips, voiceover laid over visuals is usually more reliable than generated lip sync.