How to make captions and save SRT
Subtitles can be a separate timed text file or captions visible in the video itself. Choose the output you need before exporting.
Read the instructions ↗Choose an aspect ratio without losing what matters
Aspect ratio describes the shape of your frame, resolution describes its pixel dimensions, and MP4 is a file container. These are separate settings.
9:16, 16:9 or square
The 9:16 vertical frame is suitable for viewing on a phone without rotating the device. The horizontal 16:9 is convenient for a screen, a presentation, or two interlocutors. The 1:1 square occupies an intermediate position. Focus on the material and the place of publication, not just the popular format.
Frame sizes
In Full HD, the vertical format corresponds to 1080x1920 pixels, and the horizontal format corresponds to 1920 × 1080 pixels. A 1:1 ratio means the same width and height. A higher export value will not return details that are not present in the original video.
From horizontal to vertical
When filling in a narrow canvas, the side areas of a wide video will be cut off. Move the crop area so that you can save the character or object. Check not only the starting frame: the person can move away, but the hands or object can go beyond the boundaries.
When is it better to leave the fields
If the video shows instructions on the screen, cropping may hide the menu, button, or the result of the action. Select the placement of the source image entirely with margins. It may also be clearer for two interlocutors than a close shot with only one person.
From vertical to horizontal
The 16:9 setting does not create missing parts on the sides. Place a vertical record inside a wide canvas or deliberately trim the top and bottom. AICutter This is a change in composition, not a generative extension of the image.
Last text check
After changing the format, look at the titles, subtitles, and logos. Leave margins from the edges and check if the label does not cover the face or an important button. The interface of the publishing site may overlap part of the image, so check out the preview there before posting.
The frame format is not a file converter
“Change video format” can mean converting MOV to MP4. This guide covers the shape of the frame. AICutter exports edited videos as MP4; it is not a universal container converter that avoids re-encoding.
Prepared by the editorial AICutter staff on the current features of the service. Updated November 12, 2026.
You will need an account and your video. Processing will begin only after confirmation in the project wizard.
Next steps
What to check before exporting a video
Previewing one scene is not the same as watching the whole video. Review these points after editing, then check the exported file.
Read the instructions ↗
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