How to Make a Story Trailer With AI Image-to-Video

Why Stills Are the Right Starting Point

Generating video straight from a text prompt gives you a different character in every clip. Generating video from a still image fixes the character, the setting, and the colour palette first, then adds motion. For a story trailer that consistency is the whole point: viewers need to recognise Pip in scene five as the Pip they met in scene one.

It also splits the work into two steps you can control separately: get the images right (cheap, fast to iterate), then animate only the ones you have already approved.

Step 1: Pick Five Scenes

A trailer is not a summary. It is a promise. Five beats are enough: a hook, the world, the moment things change, the threat, and the title card. Keep the ending out of it entirely.

• Lead with the single most striking image, not the chronological beginning. You have three seconds before a thumb scrolls.
• Choose scenes that differ visually: one wide, one close, one dark, one bright. Five similar frames read as one long frame.
• Write the narration line for each beat now — one sentence, under ten words. It will shape which image you generate.
• Total length: 25–35 seconds. Longer trailers lose viewers before the title card.

Step 2: Generate One Still Per Scene

If you wrote the story with Story-AI, the storyboard generator turns each scene into an image in one art style, in 9:16 if you choose. Characters can look different from scene to scene, so pick the five that match your beat sheet and regenerate any that drift. If you are using another image tool, the rules for trailer-ready stills are the same:

Step 3: Animate Each Still

Upload each still to an image-to-video tool and describe the motion. We use ImgVeo for this: paste an image, write a short motion prompt, and it returns a few seconds of video that keeps the original frame as its starting point — which is exactly what makes the five clips feel like one film. The single most useful rule, whatever tool you use, is to ask for one motion per clip:

• Describe the motion, not the image. The model already sees the image; "a mouse in a library" adds nothing, "slow push in toward the mouse" does.
• Ask for 4–6 seconds per clip. You will trim to 3–7 seconds anyway, and longer generations drift further from the still.
• Generate two or three variations of the hook and the turn — the two beats that carry the trailer — and only one of the others.
• Add "no camera shake, no morphing, consistent character" to every prompt. It costs nothing and removes the most common failures.

Step 4: Cut, Narrate, Title

Drop the five clips into any editor — CapCut or the built-in TikTok editor is enough — in beat-sheet order. Then:

For the narration line, the audiobook guide covers voice and pacing; if the trailer has dialogue between characters, the multi-voice guide applies. Export at 1080×1920, 30 fps, and post the same file everywhere — the platforms do not reward re-encoding.