Videos

Change a video's aspect ratio

Cropping a wide video into a tall one throws away two thirds of the frame and whatever was in it. Switching format here does something different: every element already knows where it belongs in each shape, so the design is rebuilt at the new aspect rather than trimmed to it.

Create a video with OneCraftWhat is stored per format, what reflows, and the three things worth checking after a switch
The product, format, length and language settings in the video generator, highlighted
Format, length and language are set here, not written into the brief.

Every slot carries a box per canvas

This is the mechanism. A slot does not have a position, it has a position for landscape, one for vertical and one for square, and the landscape one is the authoring master the others reflow from. All three are explicit rather than derived, which is the real authoring cost of supporting more than one size and the reason a lower third badge or a moving element still sits correctly in each shape.

Five things can be overridden per format

Beyond position, a slot can carry a different size, a different alignment, a different type size, a different camera move and a different 3D tilt for a given canvas. Those exist because they solve specific problems: a heading that reads well wide is too large for a narrow frame, a tilt that looks dimensional in landscape crops badly in vertical, and something centred in vertical often wants to be left aligned in landscape. Container layouts can also switch, so a row becomes a column.

Your own edits are kept per format too

Anything you change by hand on the preview, dragging a slot to a new point, nudging an offset, cropping an image, resizing, hiding a slot, is stored under the format you were in when you made it. So fixing the vertical cut cannot break the landscape one, and you can be aggressive in the narrow frame without worrying about what it does to the wide version.

The three things to check after switching

The longest headline, because a line that fits wide can wrap to three lines narrow. Any scene with several images side by side, since a row of three in landscape becomes a stack in vertical and the images get smaller. And the bottom third of the vertical cut, because captions and the corner watermark both sit low and phone interfaces cover that area.

How it works, in three steps

  1. Step 1

    Get one format right first

    Finish the placement you care about most, including the closing scene copy, before you switch. Half finished work reflows into half finished work.

  2. Step 2

    Switch in the toolbar

    The format dropdown sits beside the save state. Changing it rebuilds the layout immediately in the preview.

  3. Step 3

    Fix only what the new shape broke

    Work through the scenes once. Because edits are stored per format, nothing you do here touches the version you already finished.

The full walkthrough with screenshots is in the guide Export one video for YouTube, Reels and TikTok.

Limits worth knowing

Questions people ask

Do I have to export twice?

Yes, once per format. Each export is a separate render at that canvas, and a render already produced from identical content is reused rather than charged again.

Does switching lose my narration?

No. Narration, captions, music, images and copy are all format independent. Only layout is per canvas, which is why the switch is safe to make late.

Which format should I build first?

Landscape, if you are unsure, because it is the authoring master the other shapes reflow from. If your only placement is a phone feed, build vertical from the brief instead so the director designs for a narrow frame from the start.

Why does one scene look worse after the switch?

Usually because it holds several images at once. A gallery of four in a wide frame becomes four small tiles in a tall one. Swapping that scene for a layout that holds fewer pictures is a better fix than shrinking the text.

Make your own video

The button opens the generator with this use case already described. Change the wording to match yours, generate, then edit anything you like.

Create a video with OneCraft

Related pages

More finished work of this kind is on the video examples hub.