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.
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