Convert finished video to a new aspect ratio without cropping. Upload source footage, set a target ratio (9:16, 3:4, 1:1, 4:3, 16:9, or 21:9), and prompt how new canvas areas should be filled. Outpaints missing areas to match scene lighting and motion. Output 540p to 1080p. Ideal for repurposing 16:9 ads into vertical social, squaring trailers for feeds, and delivering platform-specific cuts from one master clip.