QUICK ANSWER
AI video often changes faces, logos and product labels because each frame must preserve details while the scene moves. The practical fix is not endless prompting: decide which details must be exact, use strong references, simplify the shot and finish critical elements in editing.
Why consistency breaks
A model can create a convincing single frame while struggling to keep identity, text, geometry and packaging stable across motion, camera changes and occlusion. Small errors become obvious when the subject is a real person or a known product.
Start with a fidelity list
- Exact: logo, legal text, product shape, label, colour and approved person.
- Flexible: background detail, secondary props, weather, particles or abstract motion.
- Forbidden: unapproved claims, altered safety information, invented results or a person’s likeness without permission.
Make the shot easier to control
Reduce simultaneous camera movement, hand interaction, reflections and tiny text. Use a clear reference, stable framing and a shorter motion segment. A simple accurate shot is more valuable than an ambitious unusable one.
Do not ask generation to typeset the final label
When exact wording matters, plan a clean surface or tracked area and composite the approved artwork during editing. The same approach can protect logos, interface screens and legal lines.
Face consistency needs permission and review
Use a consenting person or properly licensed source, keep references consistent and check every final shot. Do not present a generated lookalike as a real testimonial or employee.
A practical repair workflow
- Identify whether the error is generation, motion, compositing or compression.
- Regenerate only when the underlying shot can realistically become stable.
- Replace exact labels and logos with approved assets in post-production.
- Cut around brief identity failures when the story still works.
- Use sound, pacing and transitions to support a simpler visual.
- Review the final export at normal speed and frame by frame around critical moments.
When to stop regenerating
Stop when repeated attempts fail at the same exact requirement or the correction cost is greater than filming, compositing or redesigning the shot. Production judgment is part of the service.
Frequently asked questions
Why does AI change words inside video?
Text is a precise symbol system, while video generation is producing changing pixels across frames. Use editable text or compositing when accuracy matters.
Can a logo be fixed after generation?
Often, if the surface and movement are trackable. Complex deformation, reflections or occlusion may require a different shot.
Should I keep the first impressive result?
Only after checking identity, claims, products, hands, text, brand colours and frame-to-frame stability.
