TikTok square ad minimum 640x640: check a Sume 1:1 render first

TikTok's Auction In-Feed page lists square 1:1 non-Spark ads at 640x640 pixels or more. Sume sizes are labels (480p, 720p, 1080p), not pixel pairs, so ask for 720p or higher for a square and read the real frame size with video-inspect rather than assuming the label clears 640.

What TikTok's page says

The page lists three dimension rows for Non-Spark ads: vertical 9:16 at 540x960 or more (recommended), horizontal 16:9 at 960x540 or more, and square 1:1 at 640x640 or more. Other rules: mp4, mov, mpeg, 3gp or avi, up to 10 minutes, 500 MB or less, bitrate 516 kbps or more.

Why the label is not the answer

Sume's docs list resolutions as labels and do not publish a pixel table by ratio. If 480p means a short side of 480 pixels, a 1:1 render is 480x480, which is under 640. A 720p square would be 720x720 by the same reading, which clears. That reading is an inference, not a Sume statement, so test the actual output.

The measurement

Call POST /v1/video-inspect with a still at one moment of the finished clip. It returns frames[{t,url,width,height}] as durable media.sume.com artifacts, so you read the width and height directly. Gate the upload on width >= 640 and height >= 640.

Which models can render a square? Query GET /v1/videos/models and test that supported_aspect_ratios contains 1:1. The Gemini Omni family lists 16:9 and 9:16 only, so a square from it needs a crop.

If the clip is too small

Resubmit at the next resolution label rather than stretching the file. Timeline can set an output size between 256 and 2160 in even numbers, but scaling up does not add detail.

Keep the other TikTok numbers in the gate too: bitrate at least 516 kbps and a file size of 500 MB at most. Short AI clips rarely get near the size cap.