✳ ANSWER · DIRECT
How do I convert a horizontal video to vertical without cropping faces?
Use AI subject tracking: detect faces / motion, then zoom + pan the 16:9 source to follow the subject within a 9:16 frame. Add the target platform's safe-zone overlay before export. The aspect-fit preview shows the trade-off.
Detail
Naive center-crop cuts off the sides of horizontal footage. AI reframe detects the speaker / motion and dynamically pans within the 9:16 frame. Add the target platform's safe-zone overlay before export so your subject stays in the visible region.
Validate your file against the target platform before you ship.
Automate this in Koldflux