PROMPT GUIDE

Why AI Videos Break and How to Fix Them

Most AI video breakage comes from three causes: motion that is too large, a first frame that does not suit video, and a camera that moves too fast. All three can be reduced through how you word the prompt and choose the picture. This guide sorts common breakage by symptom and explains causes and fixes in order. The ideas apply to any AI video generator.

Last updated: 2026-10-22 approx. 4 min read

日本語版

The short answer

AI videos break mostly because the motion is too large, the first frame does not suit video, or the camera is too fast. Making the motion smaller with slowly, using a picture with a large face and simple hands, and fixing the camera reduces most breakage.

Why do AI videos break? (Three causes)

Breakage in AI videos (videos made with an AI video generator) almost always comes from one of the following three causes. Looking at the symptom and deciding which cause fits first makes the fix easier to find.

Cause	Common symptoms	Try first
Motion is too large	The face changes, the body twists, hands melt	Make the motion smaller with slowly or gently
The first frame does not suit video	The face warps, fingers multiply, text smears	Use a picture with a large face, simple hands and no text
The camera is fast or complex	The background wobbles, the frame flickers	Use only static camera or a slow push in

Fixes by symptom

Symptom	Cause	Fix
The face turns into someone else	Large motions such as turning or running, or a small face	Make the motion smaller. Use a close-up picture. Avoid turning from profile to front
Hands and fingers melt or multiply	Hand-motion instructions, or clasped fingers in the picture	Remove hand-motion instructions. Use a picture with the hands down
The frame flickers	Fine patterns, text or strong contrast	Use clothes and backgrounds with few patterns. Fix the camera
It barely moves	Weak or missing motion instructions	Name what moves (hair, blinking, petals, clouds)
The background warps	A fast camera or a large orbit	Use one camera move and add slowly
Unrelated people or objects appear	The prompt mentions things not in the picture, or the number of people is vague	Write only about what is in the picture. State the number, such as only one girl

Steps for reducing breakage (how to remake)

Watch the broken video and decide which symptom in the table it matches
Change only one thing (the motion strength, the camera or the picture)
Remake with one change at a time, such as a version with smaller motion or one with a fixed camera
Save the prompt and picture of the version that worked
Split long videos into short clips and join only the parts that did not break

What makes a first frame that does not break?

A picture with a large face, hands in a simple position, and few fine patterns or text.

The face is fairly large in the frame (for a full body, move in until the figure fills about a third of the height)
The hands are down, at the sides of the body or on the lap
Few fine stripes, checks or text on the clothes or background
The picture itself is not broken (check finger count and eye shape first)
The same aspect ratio as the video

Front facing anime girl with a large face, a start frame less likely to break in AI video — 崩れにくい：顔が大きい

Girl in plain clothes on a simple background, an image that reduces flicker in AI video — 崩れにくい：顔が大きい

Illustration usage rules

To fix broken hands in the still image first: How to Fix Bad Hands in AI Art: The Complete Guide →

To fix still-image problems by symptom: AI Art Troubleshooting Guide (Look Up Fixes by Symptom) →

How do you tell where it is breaking? (Checklist)

Instead of judging a video in one look, go through the checklist from the top and you can narrow the fix down to one thing. Try only the fix on the right of the item that applies.

What to check	If it applies	Try next
Are the fingers or eyes already wrong in the first frame?	The picture itself is broken	Remake or fix the picture before making the video
Is the first second clean, then it breaks partway?	The motion is too large	Make the motion smaller with slowly or subtle
Is the person clean while only the background bends?	The camera is fast	Use static camera or add slowly
Does the whole frame flicker finely?	Patterns, text or strong contrast	Switch to a picture with fewer patterns, or fix the camera
Does only the end break?	The video is too long	Make it shorter and continue in a separate clip
Does the same spot break no matter how many you make?	That motion itself is difficult	Change to a different motion (blinking, hair swaying)

AI videos change every time even with the same instructions, so judging from one video can mislead you about the cause. Make two or three under the same conditions and see whether the same breakage appears in all of them; that tells you whether it was chance or caused by the instructions or picture. After a fix, note the one thing you changed and the result, which makes later remakes much faster.

Example video prompts that break less

Static camera. The girl breathes softly and blinks, her hair moving slightly in a gentle breeze. Subtle motion only. Soft even daylight.

What it does: with a still camera, the girl breathes quietly and blinks while her hair moves just a little in a light breeze, with only subtle motion in soft, even daylight.

blurry, distorted face, morphing, deformed hands, extra fingers, flickering, warped background, text, watermark

An example for services with a negative prompt field: blur, a distorted face, morphing, deformed hands, extra fingers, flicker, a warped background, text and watermarks.

Rinka's tips

Start with motion so small it barely moves, and make it bigger step by step once it works
Results change every time even with the same instructions. Plan to make several and choose
Even small changes stand out on faces. The closer the face, the smaller the motion should be

For the basics of video prompts: How to Write AI Video Prompts (Motion, Camera and Time) →

For camera movement terms: Camera Movement Prompts for AI Video Generators →

FAQ

Frequently Asked Questions

Why does the face change in AI videos?

With large motion, the face can turn into someone else while the AI redraws its direction and shape. Making the motion smaller and starting from a picture with a large face tends to be more stable.

How do I keep hands and fingers from melting?

The most effective fix is to stop asking for hand motion and start from a picture with the hands down. Keep scenes that show the hands as short clips.

How do I reduce flicker?

Use a picture with few fine patterns or text, and try fixing the camera. If there is a negative prompt field, adding flickering is also worth a try.

My video barely moves.

Name what moves. Writing what moves and how, such as "her hair sways in the breeze", "she blinks" or "clouds drift", makes motion more likely.

Do these fixes work for any AI video generator?

Yes. The size of the motion, the first frame and the camera are common to most AI video generators. Detailed settings differ by service, so check the official guidance too.