Square 1:1 video from Gemini Omni: it only makes 16:9 or 9:16

Gemini Omni Flash 1.1 outputs 16:9 or 9:16 only, so a square 1:1 post needs a second step. On Sume, generate the clip at 9:16 or 16:9, then render a Timeline with output.width and output.height both 1080 and fit set to cover (crop to fill) or blur (keep the whole frame). The render costs $0.10 per output minute on top of the Omni clip.

What each side supports

Google's Omni guide lists aspect ratios 16:9 and 9:16. Sume's Video Router accepts the same two for Omni. Timeline 1.0 accepts even output.width and output.height values from 256 to 2160, and each slot's fit is cover, contain, stretch or blur.

Choose the source shape first

Cropping either shape to a square keeps 1080 of 1920 pixels along the long side, so about 44 percent of the frame is lost. Prompt for a centered subject and generate the shape that loses the least for your shot. A product on a table works at either.

Ask for the framing in the prompt ("centered, with space around the subject") because fit cannot recover what the model cropped in.

The cost and the steps

The Omni clip bills at provider list times 1.25 per second; a ten-second 720p clip is $1.25. The Timeline render adds one billable minute, $0.10. Import the clip through POST /v1/media-imports if it is not a Sume-hosted URL, call POST /v1/timeline-1.0/plan for an unbilled check, then render. Timeline needs an audio spine or audio.mode: "silence", so declare the length as the clip length.

Check the first render by eye. The blur look is a style choice; some brands prefer plain crop.