What is AI reframe?
AI reframe turns landscape footage into vertical clips without losing the subject. Here's how active-speaker tracking works — and why center-crop fails on real podcasts.
5 minute read
What AI reframe does
AI reframe automatically recomposes a landscape (16:9) video into a vertical format like 9:16, choosing the crop so the important subject — usually whoever is speaking — stays in frame. Instead of keyframing a crop by hand for every shot, the tool tracks the subject through the clip and moves the crop to follow. It's the step that makes a horizontal recording look native in a vertical feed rather than letterboxed or awkwardly cut.
Why a center crop breaks on real footage
The naive approach is to crop to the middle of the frame and hope the subject stays there. That works for a single, stationary talking head and falls apart everywhere else: two-person podcasts where speakers sit on opposite sides, panels, wide interview shots, or a facecam over a screen share. The result is a clip framed on empty space between two people, or one that cuts off the person actually talking. On multi-speaker content, a static center crop is the most common reason auto-generated clips look amateur.
Active-speaker tracking
Better reframing follows the conversation. Active-speaker tracking detects who is talking and keeps the crop on them, moving between people as they trade off — the way a human editor would cut between cameras. In a two-person interview, the framing lands on the host for the question and the guest for the answer, so the viewer is always looking at the person speaking instead of a fixed midpoint.
Caption-safe composition
Reframing and captions have to be decided together. A good crop leaves room for burned-in captions and keeps faces away from the frame edge and platform overlays — TikTok's caption bar and side buttons, for instance, cover part of the frame. If the crop ignores this, captions end up under a button or a chin gets clipped. Composing for the caption-safe area is what makes the finished vertical read cleanly on every app.
What to test before you trust a reframe tool
Don't judge reframing on a vendor's chosen demo. Run your own hardest footage through it: a two-person conversation, imperfect lighting, some movement. Then watch the output on a phone and ask three things — does the crop stay on whoever is speaking, do faces and captions stay inside the safe area, and can you re-render a different crop without re-uploading? Reframe quality is the most visible quality signal in an auto-clip, so it's worth the five-minute test.
FAQ
What is AI reframe?
AI reframe automatically crops a landscape video into a vertical format like 9:16, keeping the important subject — usually the active speaker — in frame, so horizontal footage works in a vertical feed without manual keyframing.
Does AI reframe work on two-person podcasts?
Good reframing does — that's its main strength. Active-speaker tracking moves the crop between people as they talk, which is exactly where a static center crop fails. It's worth testing on your own two-shot footage before trusting any tool.
What aspect ratios can AI reframe output?
Vertical 9:16 for Shorts, Reels, and TikTok is the default. The crop is composed to keep the speaker and captions inside each platform's safe area.
Related pages
Keep reading
More Video Basics →How to record your screen on any device
Every device you own already has a screen recorder built in. The differences that matter are not the keyboard shortcut but what audio each one captures and how readable the result is on a phone.
8 minute readHow to compress a video without wrecking the quality
Most compression advice tells you to squeeze the file as small as it will go. That is usually the wrong move, because YouTube and Meta re-encode whatever you send them anyway.
8 minute readFree stock video sites, and what their licences actually say
Attribution rules differ by site and sometimes by clip. None of these libraries hands you a model release. Here is what each licence page says, in its own words.
9 minute readTurn one long video into a week of posts
300 credits for 3 days · no card
Start free