CampaignReel

Ad placement specs against what generators output

Amazon Nova Reel publishes length as an increment

Nova Reel states duration as six second increments reaching two minutes, and states separately that anything past six seconds needs the v1:1 model ID. Length here is a multiple, so an ad either divides by six or gets rewritten. As of 2026-09-22.

A grain, a ceiling and a model IDThe length is a multiple of six seconds, the ceiling is two minutes, and reaching past the first six seconds requires a particular model identifier named elsewhere on the page.Round to sixThe brief is expressed insix second beatsA legal lengthName the modelv1:1 for anything past thefirst beatA valid requestOne requestUp to two minutes comes backalready cut into beats
Fig. 1 Three sentences on one page have to be read together before a length can be requested.
The two sentences this page reads as one length figure. Recorded 2026-09-22.
What the page statesThe valueWhere it sits
The grainSix second incrementsThe model table
The ceilingUp to two minutesThe same table row
The conditionamazon.nova-reel-v1:1 for anything longer than six secondsA separate line in the prose

Inclusion rule. The statements on this page that carry a length. A capability described only in a launch post is not counted, and neither is a figure inferred from the frame rate. Order. Grain, then ceiling, then the condition attached to the ceiling.

1A multiple behaves unlike a ceiling

Most rows in this column publish an outer edge and let anything shorter through. This one publishes a step. Six, twelve, eighteen: those are the lengths available, and a brief asking for eight seconds has no legal value to round to.

That reverses which side does the rewriting. Elsewhere the tool bends to the slot, trimmed in an edit afterwards. Here the slot has to be expressed in sixes before the request is made, and a bumper at five to six seconds is the one YouTube format the grain lands on exactly.

2Two minutes arrives inside one request

Two minutes is the largest figure in this column that belongs to a prompt-driven scene generator rather than to a performance driven by an audio track. A sixty second slot is one request of ten beats, not ten requests and nine joins for an editor to reconcile.

What is given up is placement of the cuts. The model decides where one beat ends and the next begins, so the seams exist but nobody in the edit chose them. For an advertisement with a fixed beat at the end, that is a real loss and it is not visible in the length figure.

3The model ID is part of the specification

The condition sits in prose rather than in the table, and it is easy to read the ceiling without it. A request made against the wrong model ID is capped at six seconds, which looks like a quota problem and is actually a specification the page did state.

This register keeps it in the same row as the ceiling for that reason. A length that only exists on one identifier is a length with a precondition, and the precondition belongs beside the number rather than three paragraphs away from it.

4Where this cell sits in the column

Duration, generator by generatorWhat each generator prints as a length, Amazon Nova Reel marked. Nothing on this axis comes from a surface. Recorded 2026-09-22.Duration, generator by generatorDurationAmazon Nova Reel — Duration: 6 s increments, up to two minutesAmazon Nova ReelCogVideoX — Duration: 6 s, at 49 framesCogVideoXGoogle Veo — Duration: 4, 6 or 8 sGoogle VeoGrok Imagine — Duration: 1 to 15 sGrok ImagineHedra — Duration: 10 minutesHedraHeyGen — Duration: 30 minutes per sceneHeyGenKling AI — Duration: Not statedKling AILTX-Video — Duration: Frames, never secondsLTX-VideoMiniMax — Duration: 4 to 15 sMiniMaxPika — Duration: 5 s and 10 s, 20-25 s on PikaframesPikaPixVerse — Duration: 1 to 15 s on version 6PixVerseRunway — Duration: 5 to 15 s on Gen-4.5RunwaySceneMixer — Duration: Thirty seconds on the Wan tiers, fifteen on H3SceneMixerVidu — Duration: Not statedViduWan 3.0 — Duration: 2 to 30 sWan 3.0
Fig. 2 What each generator prints as a length, Amazon Nova Reel marked. Nothing on this axis comes from a surface. Recorded 2026-09-22.
Every generator in the register on the duration column, with Amazon Nova Reel marked. Recorded 2026-09-22.
GeneratorDuration
Amazon Nova Reel6 s increments, up to two minutes
CogVideoX6 s, at 49 frames
Google Veo4, 6 or 8 s
Grok Imagine1 to 15 s
Hedra10 minutes
HeyGen30 minutes per scene
Kling AINot stated
LTX-VideoFrames, never seconds
MiniMax4 to 15 s
Pika5 s and 10 s, 20-25 s on Pikaframes
PixVerse1 to 15 s on version 6
Runway5 to 15 s on Gen-4.5
SceneMixerThirty seconds on the Wan tiers, fifteen on H3
ViduNot stated
Wan 3.02 to 30 s

Inclusion rule. Every generator with a row in this register, carrying whatever its own page states as a length. A page that states none keeps its row and says so. Order. Alphabetical by generator name.

5Sources

Read from the Amazon Nova user guide, checked 2026-09-22. The column itself is described on duration, and the rule that keeps surfaces and generators apart is on method. Next along this column: CogVideoX, Google Veo.