Start free with 50 credits
AI video extender
Upload a video and make it longer. Describe what happens next, and our AI video extender continues your clip with new footage that starts where it stops.
Start with 50 credits, no subscription required
Explore what’s possible with Protoface
Longer AI videos made with Protoface
A balloon flight that carries on over a river and a walk along a pier that keeps going, each extended with Protoface. Upload a video to make yours longer.
How it works
How does the Protoface AI video extender work?
Upload a video and Protoface makes it longer. Your video sets the scene, and your description sets what comes next.
YOUR VIDEO
01 / CLIP
Your video sets the scene
The subject, the setting and the look all come from the video that you upload.
WHAT HAPPENS NEXT
02 / WORDS
Your words set what comes next
Describe the next few seconds in a sentence, such as “The balloon crosses a winding river.”
YOUR LONGER VIDEO
03 / RESULT
Your video carries on
New footage starts from the last frame of your clip and plays on from there.
How to extend a video
How to extend a video with AI on Protoface
Go from a short clip to a longer one in six steps, with no editing software and no subscription.
01 / CLIP
Upload the video you want longer
Use a clip you made on Protoface or a video of your own that you have the right to use.
02 / MODEL
Pick a model that can extend
Seedance 2.0, Seedance 2.0 Fast, Seedance 2.0 Mini and Seedance 2.5 all extend a video.
03 / DESCRIBE
Describe what happens next
Say what the subject does and where the camera goes, in one or two plain sentences.
04 / LENGTH
Set how many seconds to add
Add 4 to 15 seconds on Seedance 2.0, or 4 to 30 seconds on Seedance 2.5, in one extension.
05 / GENERATE
Check the cost, then generate
Look at the credit estimate for your settings first, then generate the new part of your video.
06 / REVIEW
Watch where old meets new
Check the point where your clip ends. If the motion jumps, reword one detail and try again.
Better clips, cleaner joins
Which videos work best in an AI video extender?
The new footage starts from the last frame of your clip, so that frame matters most. Check it before you spend credits.
✓
The last frame is sharp, with your subject fully in view
✓
The motion has somewhere to go, such as a path, a road or open sky
✓
The camera moves steadily, with no cut near the end
✓
Your description continues the same scene instead of starting a new one
Ideas
What can you make with the Protoface video extender?
Give a clip that stops too soon the extra seconds it needs, whether it is a dance, a scene in a longer story or a video that began as a photo.
01 / DANCE
A dance video that runs longer
Made a clip with the AI dance video generator? Make your dance video longer.
02 / SCENES
A scene with room to play out
Telling a story across shots? Build a longer scene with the AI movie generator.
03 / NO CLIP
A clip that starts from a photo
No clip yet? Start from a photo with image to video AI, then extend the result.
Choose your model
Which Protoface models can extend a video?
Choose from one of our 44 models, and switch whenever you like, on the same credits. To make a video longer, start with models such as Seedance 2.0, Seedance 2.0 Fast or Seedance 2.5.
Pricing
How much does it cost to make a video longer with AI?
You pay only for the extensions you make. There is no subscription, and you can start free.
01 / START FREE
Start with 50 free credits
New accounts get 50 free credits, and you need no credit card to sign up.
02 / PAY AS YOU GO
Pay only for what you make
Buy credits when you need them. There is no subscription, and a monthly plan is optional.
03 / NO SURPRISES
See the cost before you generate
Protoface shows the cost of an extension before you make it, so you decide first.
Is there a free AI video extender?
Yes, you can try this one free. New accounts start with 50 free credits and need no credit card. That is enough to make a first short extension and see how it looks. Before your first payment, free-credit videos are watermarked and for evaluation only.
Rights and consent
Which videos are you allowed to extend?
An extension adds new footage to a clip, so the clip has to be yours to build on and the real people in it have to agree.
01 / RIGHTS
Videos you have the right to use
Extend clips you made, filmed or licensed. A clip found online is not yours to continue.
02 / PEOPLE
Real people who gave consent
If your video shows real people, get their consent before you generate new footage of them.
03 / SHARING
Say when footage is AI-made
Label the video as AI-generated when you post it, so viewers know what they are watching.
For developers
Add an AI video extender to your app
Offer longer videos inside your own product with the Protoface API. Your app sends the clip and the description, and gets the continuation back.
01 / SEND
Send the clip and description
Your app uploads the video your user picked and what they want to happen next.
02 / EXTEND
Start the extension
One request to Seedance 2.0 creates it. You pay as you go, with no subscription.
03 / DELIVER
Show the longer video
When the new footage is ready, your app collects it and shows it to your user.