How to Write Prompts for AI Video Motion

AI Editor in Effect House enables you to create dynamic video effects using the I2V model. By writing clear and detailed prompts, you can bring motion and actions to life in your creations. This guide walks you through how to describe motion explicitly, use complete sentences, choose between rephrased or original outputs, and control the camera with specific keywords.

Video Model Overview

I2V-Model: Upload a picture and generate AI video directly

Sway Dance

Food Lotto

3D Cartoon

FL2V-Model: Upload two pictures and generate a transition AI video of the two pictures

Mermaid

Wedding

Slacking Toon

How to Use the I2V Model

To get the most out of the I2V model, it helps to understand a few key tips and caveats. These suggestions will guide you toward writing stronger prompts and generating better results.

Write Prompts That Focus on Motion

Since the I2V model follows prompts closely, you'll get the best results when you describe actions and movement instead of only static details. Try to frame your prompt around what's happening in the scene, not just what's visible.

Prompt without motion

"A woman places her hand on a man's shoulder."

Prompt with motion

A woman and a man kiss each other.

Use Complete Sentences

It is recommended to write complete sentences rather than just a few words. If your prompt is fewer than seven words, the system automatically expands it with the rephraser to make it more descriptive.

Original prompt

"Stretch with open hands."

Complete sentence

"In this video, a girl with blonde hair and striking blue eyes is depicted stretching gracefully with her arms outstretched."

Choose Between Rephrased or Original Results

Both the original and rephrased versions of a prompt can be useful. You can turn rephrasing on or off and decide which output works best for your vision.

Before (without rephraser)

"This animal is adorable scratching its head and winking its eyes"

After (with rephraser)

"In this animated video, we see a cute and adorable tiger cub sitting on a grassy field. The cub has big, expressive eyes and is seen scratching its head and winking its eyes playfully. The background features a sunny day with leaves falling from trees, creating a warm and inviting atmosphere. The tiger cub's fur is soft and fluffy, adding to its endearing appearance. As the video progresses, the cub continues to interact with its surroundings, showcasing its playful nature and charm"

Use Specific Words to Control the Camera

You can also guide the camera within the scene by using keywords like:

• Zoom In
• Zoom Out
• Camera Spin Shot

Zoom In

Zoom Out

Camera Spin Shot

Prompts

• "In the dimly lit garage, a sleek, silver classic car rests quietly, showcasing its polished curves and retro-styled headlight.. camera zoom in."
• "In the dimly lit garage, a sleek, silver classic car rests quietly, showcasing its polished curves and retro-styled headlight.. camera zoom out."
• "In the dimly lit garage, a sleek, silver classic car rests quietly, showcasing its polished curves and retro-styled headlight.. camera spin shot."

note

“Spin shot” may sometimes be confused with the subject itself spinning. To avoid ambiguity, make sure you clarify the action in your prompt.

Prompt

"Shot of a woman standing in the middle of the desert, with the lens rotating and zooming to showcase her style."

The Accurate Case

The Ambiguous Case

Prompt Examples

note

Before writing a prompt, keep in mind that the current model can only handle one action at a time. For example, a prompt like “The character shouts and dances at the same time” may not produce good results. Instead, split it into two separate prompts:

• “The character shouts.”
• “The character dances.”

Multiplayer Interaction

Use this type of prompt when you want multiple characters to interact with each other.

Prompt

"This girl's boyfriend walks into the frame from the side, approaches her, and they warmly hug each other. Their embrace is affectionate and natural, with smooth animation."

      

Human-Object Interaction

These prompts describe how a character interacts with objects.

Prompt

• "The character picks up the pizza and starts eating it like crazy, filling their entire mouth."
• "The character quickly takes out a giant koala and holds it in their arms."

      

Solo Animation

Use this when you want a single subject to move in a lively or expressive way.

Prompt

• "The subject quickly starts a funny, comical dance, spinning around, taking quick side steps, and then swinging their hips. They shake their hands, toss their hair, and quickly start dancing."
• "The excitement point in the frame jumps up and cheers loudly in celebration."

      

Avatar Customization

These prompts let you transform a character's look or appearance.

Prompt

• "The character quickly puts on the tuxedo, takes out the violin and starts playing."
• "The character quickly spins around, the character's hair instantly turns into a colorful clown wig, they have a big red clown nose on their face, white clown face with exaggerated black and red makeup forms, and massive fireworks fill the sky"

      

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Guidelines

When writing prompts, please make sure your content adheres to the following guidelines:

1. Do not include religious extremism, attacks on religious beliefs, or incitement of hatred or discrimination.
2. Do not generate violent threats, abuse, terrorism, or incitement to harm individuals or groups.
3. Do not generate obscene or pornographic material, sexual content involving minors, sexual violence, or adult sexual services.
4. Do not generate illegal or dangerous content such as criminal activity guides, drug production, weapon manufacturing, hacking, or fraud.
5. Do not generate instructions for illegal activities or fraudulent methods.
6. Do not generate content that incites subversion, spreads false political information, or endangers social stability.
7. Do not generate false medical advice that could lead to health risks.
8. Any inappropriate or illegal content involving minors is strictly prohibited.
9. After testing your effect for stability, you can publish it to make it more popular.

Frequently Asked Questions

I still don't know how to write prompts. Are there more references?

Feel free to use external AI tools to expand your text into more complete prompts.

What should I do if I want to create different looks?

We recommend uploading an image for the final frame or using the AI Stylization feature to generate them.

What if the model can't produce the effect I want?

You can wait for the new model. We'll be launching a new video model soon for everyone to use.