More control in Create with AI

Set custom duration, aspect ratio, and visual references when generating B-roll videos and images.

See what Synthesia can do for you

You now have more control in Create with AI, with new generation settings that help you steer B-roll videos and images so they better match your desired output.

What’s new

Instead of generating a single fixed type of output, you can now fine-tune how your generated media looks and feels:

Choose a custom video duration for generated B-roll video (for example, four, six, or eight seconds)
Pick an aspect ratio for generated images, including 1:1, 3:4, and 4:3
Use visual references (an Avatar or Space) so generated images stay more consistent with the style of your scene
Convert an image to a video directly from the asset menu

This gives you more control over framing, consistency, and pacing, with fewer iterations.

More updates

See all updates

New Feature

Introducing Sessions: Interactive Avatars that coach, interview, and guide

Real conversations with a lifelike Avatar for practice and gathering insight, at a scale a person never could.

10/1/26

Improvement

Add burned-in captions to dubbed videos

Add burned-in captions to dubbed videos in one click, so your localized content stays accessible and easy to follow, even with sound off.

9/30/26

Improvement

Upload WebP images to your videos

Bring WebP files straight into the editor—use still or animated WebP on the canvas, keep transparency, and skip manual file conversions.

9/29/26

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