Pixverse Video Expand

Pixverse Video Expand — AI Video Aspect Ratio & Outpainting

What is Pixverse Video Expand?

Pixverse Video Expand is an AI video outpainting model that changes a clip's aspect ratio without cropping. Instead of cutting pixels to fit a new frame, it generates new content around your original footage, so the scene grows to fill the target shape while the subject stays exactly where it was. Upload an MP4, MOV, or WebM up to 50 MB and 30 seconds, pick a target ratio, and it returns a reframed clip the same length as the source with its audio kept.

Key Features

• •AI outpainting that adds pixels around the frame instead of cropping.
• •Six target ratios: 16:9, 9:16, 21:9, 4:3, 3:4, and 1:1.
• •720p or 1080p output.
• •Keeps the input's length and audio.
• •Subject preserved at original size — no stretching, no black bars.
• •Motion and subject stay consistent across every frame.

Best Use Cases

Turn one master into every format your channels need. Convert a 16:9 shot into a 9:16 Reel, TikTok, or YouTube Short, a 1:1 feed post, or a 21:9 website hero — without a reshoot or a destructive crop. Because the subject is never cut off, faces, products, and on-screen action survive the reframe, which matters for ads, product clips, and talking-head footage. Reframed clips drop straight into the rest of your pipeline for editing, audio, lip sync, subtitles, or branded overlays.

Prompt Tips and Output Quality

Video Expand has no text prompt — the result is driven by your source clip and the target ratio. Choose a ratio different from the source so there is room to generate. The model is most convincing on stable shots with a clear central subject and a background that can plausibly extend, such as skies, walls, stages, or streets. Extreme jumps like 16:9 to 9:16 invent the most new area, so simple backgrounds read cleanest; square or near-square targets need less fill and look sharpest.

How to Use Pixverse Video Expand

Pixverse Video Expand reframes an existing clip to a new aspect ratio by generating fresh content around the original frame. Start with footage you already have and let the model grow the canvas to fit a new platform.

Choose your target ratio

Set an aspect_ratio that differs from your source. For vertical platforms (Reels, TikTok, Shorts) choose 9:16; for a square feed post choose 1:1; for an ultrawide banner choose 21:9; use 4:3 or 3:4 for classic and portrait frames. The further the target is from the source shape, the more new scene the model must invent.

Prepare the source

Upload an MP4, MOV, or WebM up to 50 MB and 30 seconds. The output keeps the clip's length and audio, and the per-second cost follows the input duration, so trim to the moment you need before expanding. Stable shots with a clear central subject and a background that can extend naturally — skies, walls, stages, floors — outpaint most cleanly.

Set the quality

Choose 720p for quick drafts and social-first delivery, or 1080p for final, high-resolution output.

Recommended Settings

The tested default reframes a 16:9 stage clip to 9:16 at 1080p. The dancer stayed centered and uncropped at her original size, the floor extended cleanly below her, and there were no black bars or stretching — confirming the subject-preserving behavior. For the sharpest social verticals, pair 9:16 with 1080p; drop to 720p to iterate faster. For cleaner fills on busy footage, favor smaller ratio changes (1:1, 4:3, 3:4) over extreme 16:9 to 9:16 jumps.

Examples to try

Each example below ran end to end at the exact aspect_ratio and quality shown; every clip kept its source length, audio and motion, and the original subject stayed uncropped at full size while freshly generated scene filled the added area.

• •Vertical for Reels and TikTok (default). 16:9 → 9:16 at 1080p. The stage dancer stays centered and full size while fresh stage above and floor below fill the tall frame, with no black bars and no cropping. Tip: the bigger the ratio jump, the more scene the model invents, so feed a stable, uncluttered shot.
• •Square feed post. 16:9 → 1:1 at 720p. A potter's wheel and clay-covered hands hold the original band while a plaster wall above and a wooden cabinet below fill the square. Tip: 1:1 adds the least new area from a 16:9 source, so it is the cleanest reframe to start from.
• •Reverse: vertical into widescreen. 9:16 → 16:9 at 720p. A phone-shot meerkat on a mound becomes widescreen as flat savanna grass and sky generate to its left and right. Tip: expand works both ways, so go vertical to wide when you need the sides filled rather than the top and bottom.
• •Ultrawide hero banner. 16:9 → 21:9 at 720p. An astronaut keeps walking across a red plain that now stretches to both far edges as one cinematic strip. Tip: 21:9 invents the most side area, so a simple, extendable background such as a plain, sky or wall fills cleanest.

Also built for: 4:3 for classic players, 3:4 for portrait slots, and turning one master clip into every platform ratio — always pick a target that differs from your source and keep the subject clear of the frame edges.

Does it crop my video?

No — it grows the canvas and keeps the original frame intact.

Does it make my clip longer?

No; that is Video Extend. Expand changes the frame, not the duration.

Which aspect ratios are supported?

16:9, 9:16, 21:9, 4:3, 3:4, and 1:1.

What files can I upload?

MP4, MOV, or WebM up to 50 MB and 30 seconds.

Is my audio kept?

Yes, the output keeps the source's audio.

What resolution does it output?

720p or 1080p.