AI spokesperson video for TikTok ads: a spec check against Sume

For TikTok ads, TikTok recommends 9:16 with a minimum of 540x960 for non-Spark ads. Sume Avatar 1.0 renders 9:16 by default at 720p and runs 4 to 60 seconds, so its output type fits the ad spec on aspect ratio and length. Confirm the file size and bitrate on your actual export before you upload.

The TikTok side

From TikTok's video ad specifications, read 2026-10-08, for non-Spark ads:

The Sume side

From Generate avatar video, read 2026-10-08:

Gaps to check yourself

The Sume page does not state the container, bitrate or file size of the returned MP4, and it gives the resolution as 720p without a pixel size. Before a campaign, render one clip, run Video inspect on it, and compare the probe to the TikTok numbers above. Do not assume a clip meets the bitrate floor because it looks sharp.

A spokesperson ad is also an advertising claim made by a synthetic person. Check TikTok's own policies on AI-generated content before launch; this post covers only the file specifications.

A short workflow

• Create or reuse an avatar handle.
• Write a script of 15-30 seconds for a typical hook-and-offer ad.
• Preview first frames at 9:16.
• Render with captions enabled.
• Probe the output, then upload.

Checklist before upload

Probe the rendered file for container, resolution, duration and bitrate. Compare to the table above. Confirm captions are readable at phone size and inside the platform's safe areas. Listen to the audio on speakers and headphones. Confirm that the speaker and product claims match your policies, since an AI spokesperson still carries an advertiser's responsibility for what is said.

If a spec is missed, re-render with the same avatar handle rather than altering the file by hand. For Spark Ads, TikTok's page says mp4 or mov with no duration restriction, so the length rule above applies to non-Spark ads only.