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

Start free, scale when you're ready: Roleplay Sessions now has a plan for every team

Practice conversations with an Avatar that pushes back, get coached in the moment, and track skill progress. Now with three plans, starting with free.

9/4/26

Improvement

Adjust speaker attribution for dubbed videos

Reassign, create, and rename speakers in a dubbed video with one click—available on Enterprise plans.

9/3/26

Avatars

Meet Express-3, our most lifelike avatar yet

Our best avatar model to date — sharper, faster, and more expressive, live for every user on every plan.

9/3/26

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