AI Expand Video
Rescale & Outpaint Videos
Constraints are over. If you shot horizontal but need vertical, don't crop—expand. Use AI expand video technology to hallucinate realistic new pixels beyond the frame borders.
Trusted by creative teams at
Video Outpainter
Expand beyond the frame
Expansion Preview
Your expanded video will appear here. The AI will generate new content beyond your original frame.
Beyond the Frame
The 'Aspect Ratio War' is a headache for creators. YouTube wants 16:9 (Horizontal). TikTok wants 9:16 (Vertical). Instagram Feed wants 4:5 (Square-ish). Historically, this meant shooting in 4K and 'Crop In,' losing 50% of resolution and cutting off important details.
Cropping is destructive. Expansion is additive.
FlowVideo AI's AI Expand Video tool uses Generative Fill technology—similar to Photoshop's AI, but for moving images. It analyzes the pixels at the edge of your frame and generates more of the same. Beach on the left? More beach. Cloudy sky at the top? More clouds. Convert horizontal to vertical without zooming in.
Infinite Canvas
Expand without cropping
Why Expand Video with AI?
Why is 'Un-cropping' the future of repurposing?
The Infinite Canvas
Traditional video has borders. Generative video has a horizon. Turn that claustrophobic crop into an epic wide shot. Expanding the frame reveals context—the room, the environment—adding 'Breathing Room' to your composition. It feels more cinematic.
Multi-Platform Dominance
A high-budget TV commercial shot in 16:9 looks terrible when squeezed into a vertical phone screen with black bars. By 'Outpainting' the top and bottom, you fill the phone screen with immersive content, increasing 'View Through Rate' significantly.
Salvaging Bad Framing
You filmed the wedding speech but cut off the top of their head. You filmed a dance but cut off the feet. In the past, this footage was trash. Now, the AI can regenerate the missing hair or shoes. It rescues 'ruined' footage.
The Ken Burns 2.0
With Outpainting, you can do an 'Infinite Zoom Out.' Start with a close-up of an eye. Expand to the face. Expand to the city. Expand to the planet. This visual effect, previously requiring $50,000 CGI, is now click-to-generate.
The Technology: Temporal Outpainting
How does the AI dream up new video?
Spatial Context Awareness
The model looks at available pixels to infer what should be next. Texture Matching (wood grain direction), Lighting Consistency (shadow direction), and Perspective (vanishing point geometry) all factor into the generation.
Temporal Consistency (Optical Flow)
The new pixels can't be static—they must move with the camera. We use Optical Flow algorithms. The AI generates a 'Base' expansion for the first frame, then propagates that texture forward in time, preventing flickering.
Prompt-Guided Expansion
You can guide the hallucination. Unprompted: The AI guesses based on surroundings. Prompted: 'Expand the top, add a UFO.' The AI will paint a UFO into the new sky area, seamlessly integrating it.
How to Rescale Your World
From 16:9 to 9:16 without the crop.
Upload Source Footage
Higher resolution is better. The AI needs good 'seed' pixels. Stable footage (tripod/gimbal) expands better than shaky handheld footage.
Choose Target Aspect Ratio
9:16 (Vertical) adds pixels to Top and Bottom for TikTok/Reels. 16:9 (Horizontal) adds Left and Right for YouTube. 1:1 (Square) adds all sides for Instagram Feed.
Define the Content (Optional)
Auto: 'Just fill the space naturally.' Custom: 'Fill the bottom with a red carpet.' 'Fill the sides with a jungle.' Change the setting entirely.
Generate and Refine
Wait for the diffusion model to generate frame by frame. Check edges for seamless integration. If artifacts appear, click 'Regenerate' to roll the dice again.
Post-Processing (Reframe)
Use the 'Reframing' tool to move your original video within the new expanded canvas—e.g., move the person up to leave room for captions at the bottom.
Troubleshooting Outpainting Glitches
⚠️ Flickering
Temporal instability.
✓ Increase 'Consistency' slider (makes it stickier).
⚠️ Blurry Edges
Source video is low res.
✓ Use 'Upscale Source' before expanding.
⚠️ Weird Objects
AI got creative.
✓ Use a Negative Prompt (e.g., 'no people, no hands').
⚠️ Seam Visible
Lighting changed.
✓ Use 'Feather Edge' to blend the seam.
Crop vs. Expand
| Feature | Cropping (Zoom) | AI Expansion (Outpaint) |
|---|---|---|
| Resolution | Lost (Lower quality) | Kept/Increased |
| Composition | Tight / Claustrophobic | Wide / Epic |
| Context | Lost | Added |
| Look | Reposted | Native |
| Cost | Free | Compute Heavy |
Industry Use Cases
Netflix/Cinema (Restoration)
A movie shot in 4:3 in the 90s. Use AI to expand the sides to 16:9 so it fills modern TVs without black bars. Makes old content feel new.
Real Estate
Agent filmed the room vertically for TikTok but needs horizontal for Zillow. Expand the video—AI fills in the rest of the walls and windows. One shoot, two assets.
E-Commerce
Product video is too tight; text overlay covers the product. Expand by 20% on all sides—creates 'Negative Space' for text and buttons.
Virtual Reality (VR)
Expand video to 180-degrees. The AI wraps the generated environment around the viewer, creating a fake immersive experience from a 2D clip.
What Users Are Saying
Magic borders.
“I shoot everything horizontal and repurpose for TikTok. The expand feature is witchcraft. It generates perfect backgrounds. My vertical clips look native, not cropped.”
David K.
Content Repurposing Specialist
“Client wanted a horizontal video of a room I shot vertically. The AI expanded the walls perfectly. You can't tell it's generated. Saved me a $500 reshoot.”
Michelle T.
Real Estate Photographer
“We're restoring old 4:3 footage to widescreen. The AI expansion maintains the original aesthetic while filling modern screens. Revolutionary for preservation.”
Carlos R.
Vintage Film Archivist
Frequently Asked Questions about Expand Video
Stop throwing away pixels. Stop compromising your composition. FlowVideo AI's AI Expand Video tool gives you the freedom to frame your world after you've shot it. It is the undo button for reality.