How does it decide which visual goes where?

Each scene of the narration is described by what it is about, candidate clips are searched for that meaning, and an AI looks at the actual frames to check the clip shows it. Matching meaning rather than single keywords is what avoids visuals that are technically related and practically meaningless.

How is this different from the B-Roll Generator?

They work together: the B-Roll Generator page covers where the visuals come from, and Smart B-Roll covers how each one is matched to a line of the narration.

Can it mix stock and AI-generated visuals?

Yes, and mixed is the sensible default. Real footage carries claims about real things; generated imagery covers abstract or conceptual material that no stock library has filmed.

What if a chosen visual does not fit?

Swap it before publishing, either for another clip or for your own upload. A mismatched visual distracts more than a neutral one, so it is worth the few seconds.

FeatureCapabilityUpdated Nov 5, 2026

Smart B-Roll: AI-Powered Visual Storytelling on Autopilot

ShortFast's Smart B-Roll uses AI to read your script and put the right visual on every line: licensed stock footage when a real clip fits, after an AI checks the actual frames against what the narration says, and an AI-generated image when nothing does. Every scene is timed to the voice, and you can swap any shot or upload your own. On top of it, AI edit adds motion design: big hook words, counters and charts, maps with pins and labels, the subject cut out and popped forward.

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What you get

Inside Smart B-Roll

Context-aware stock footage matched to your script

AI-generated visuals when stock footage isn't enough

Automatic timing that syncs with narration beats

Seamless transitions between scenes

Overlays and motion graphics on top, with AI edit

Coming soon: visual selection that keeps improving as you create more

FAQ

Common questions

How does it decide which visual goes where?: Each scene of the narration is described by what it is about, candidate clips are searched for that meaning, and an AI looks at the actual frames to check the clip shows it. Matching meaning rather than single keywords is what avoids visuals that are technically related and practically meaningless.
How is this different from the B-Roll Generator?: They work together: the B-Roll Generator page covers where the visuals come from, and Smart B-Roll covers how each one is matched to a line of the narration.
Can it mix stock and AI-generated visuals?: Yes, and mixed is the sensible default. Real footage carries claims about real things; generated imagery covers abstract or conceptual material that no stock library has filmed.
What if a chosen visual does not fit?: Swap it before publishing, either for another clip or for your own upload. A mismatched visual distracts more than a neutral one, so it is worth the few seconds.

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Smart B-Roll: AI-Powered Visual Storytelling on Autopilot

Inside Smart B-Roll

Common questions

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