When I first started working on SketchVideo AI, the idea sounded simple:

Upload a sketch, describe the motion, and get a video.

But after testing different video models, I realized something interesting:

**Most video models are not really good at understanding rough sketches directly.**

They can animate images pretty well.
They can generate cinematic videos from polished visuals.
But when the input is a rough sketch, the result often becomes unstable.

Sometimes the model keeps too much of the pencil sketch >Sometimes it changes the subject too much.
Sometimes it understands the motion, but the visual result does not feel complete.

So I changed the workflow.

Instead of:

Sketch → Video

I started using:

Sketch → Image → Video

That small change made the product much easier to use.

## The hidden problem with sketch-to-video

A sketch is not the same as a finished image.

It may have missing details.
It may only show a rough pose.
It may not define colors, materials, lighting, or background clearly.

For a human, that is fine. We can understand the intention.

But for a video model, the sketch is often too open-ended.

If I ask it to generate a realistic video directly from a sketch, it may completely reinterpret the subject.
If I ask it to preserve the sketch, the result may look too raw.

Neither result is always what the user expects.

That is why I think “sketch to video” should not always mean direct sketch to video generation.

A better workflow can be:

1. Understand the sketch
2. Convert it into a clean visual base
3. Animate that visual base

## Keeping the interface simple

One mistake I wanted to avoid was making the user write two prompts:

- one prompt for image generation
- one prompt for video generation

That might be powerful, but it also makes the product feel like a prompt engineering tool.

For a small tool, that feels too heavy.

So the interface stays simple:

Upload sketch
Choose video >Describe motion
Generate video

The user only writes the motion prompt.

For example:

“The rabbit walks forward, ears bounce gently, and the camera slowly zooms in.”

That is enough.

The system handles the image step automatically.

## Three video >
I also didn’t want to add too many >
Too many choices make the product look more powerful, but they also make the first experience slower.

So I kept only three >
### Sketch Animation

This keeps the hand-drawn look.

It is useful for rough storyboards, line art, and early concept sketches.

### Illustration Video

This turns the sketch into a polished illustrated video.

This feels like the most useful default for characters, cartoons, children’s drawings, and comics.

### Realistic Video

This turns the sketch into a more realistic or cinematic video.

This works better for product sketches, interiors, architecture, and realistic scenes.

The important part is that these are not “image >
They are video outcomes.

The backend can still use different image prompts internally, but the frontend should speak the user’s language.

## What this tool is not

SketchVideo AI is not a professional animation tool.

It is not a timeline editor.
It is not a full video production platform.
It is not trying to compete with advanced creative suites.

It is just a small tool for one narrow workflow:

Turn a rough visual idea into a short motion preview.

That narrowness is intentional.

A lot of AI tools try to do too many things at once. For this product, I want to see whether a simple use case is useful enough before adding more features.

## Where it might be useful

The use cases I’m most interested in testing are:

- character sketches
- children’s drawings
- fashion sketches
- product concepts
- storyboard frames
- architecture or interior sketches

Some of these are more fun.
Some are more practical.
Some may be better for SEO.
Some may actually convert better.

That is what I’m trying to figure out now.

## The current product

The tool is called SketchVideo AI.

The current workflow is:

Upload a sketch
Choose a video >Describe the motion
Generate a short video

It is live here:

https://www.sketchtovideoai.com

I’m still testing which >
My current guess:

Illustration Video is probably the best default.
Realistic Video may be better for commercial use cases.
Sketch Animation is useful, but more niche.

If you work with sketches, storyboards, product concepts, or visual ideas, I’d be curious to know:

Would you want the tool to preserve the sketch >