Meta lists Reels ads from 0 seconds; Sume's shortest trim is 0.2

The odd number on Meta's page

Meta's Instagram Reels ad page (read 2026-10-09) gives a video length of "0 seconds to 15 minutes", while the Instagram Feed and Facebook Feed pages start at 1 second. The 0 reads as a floor with no minimum rather than a promise that a zero-length file is accepted, so treat 1 second as the practical minimum on all three.

What Sume can make that short

Different Sume jobs have different floors, listed in the docs read 2026-10-09. A video trim output must be at least 0.2 seconds. A Timeline video slot must be at least 0.2 seconds on screen, but the render itself needs audio.duration_seconds of at least 1. Generation floors depend on the model, from 2 seconds for wan-3.0 up to 5 seconds for the minimax models.

A 1-second bumper-style cut

If you need a 1-second hook cut from a longer ad, trim is the right tool: start at the beat and duration: 1, for $0.02, with precision: exact so the cut lands on the frame rather than a keyframe. A 1-second Timeline render also works, billed as 1 minute at $0.10, because billing rounds up to whole minutes. That is five times the trim price for the same length, so trim when you only need to cut.

Cost of the shortest generated clip

The cheapest generated option is the one with the lowest floor and rate. A 2-second wan-3.0 clip at 480p is 2 x $0.0625 = $0.125. A 3-second Omni Flash 1.1 clip at 360p is 3 x $0.0375 = $0.1125. Neither is a finished ad on its own, but both are inside the Meta Feed minimum of 1 second once you place them in a render with sound.

Why the floors differ

The floors exist for different reasons. A trim only has to produce a valid file, so 0.2 seconds is enough. A Timeline render builds a soundtrack and a picture together, so it needs at least a second of audio to lay clips over. A generation model has its own minimum because the provider sets it, which is why the floors run from 2 seconds to 5.

None of these floors is the one that governs delivery. The platform page does, and for Feed placements that is 1 second. If a very short file is rejected despite meeting the listed length, check the other listed properties first: ratio, resolution, frame rate and audio, which Meta's pages list alongside length.

Because the Reels page lists no lower bound, you cannot rely on a 0-second reading as permission for a sub-second file. Stay at or above 1 second on every Meta placement and you are inside the stated range everywhere.