CampaignReel

Ad placement specs against what generators output

CogVideoX publishes one length and no range

The CogVideoX-5B card gives a video length of six seconds at forty-nine frames and an inference frame rate of eight. No range, no menu and no increment appear anywhere, so the division against a slot has one answer and no remainder to argue about. As of 2026-09-22.

A fixed length has no remainderSix seconds with no range means a slot divides exactly. The cost is the join count, which grows in whole pieces because nothing can absorb the leftover.What the card statesSix seconds, fixedNo range, no menu, no increment to negotiate withA slot divides exactlyThirty seconds is five pieces, sixty is tenEvery division is a joinNine seams for a minute, each generated separatelyWhat follows for an edit
Fig. 1 Exactness at the planning stage buys a join count nobody can trim later.
What the card states about how long one inference run is. Recorded 2026-09-22.
Field on the cardValueWhat it leaves open
Video length6 secondsNothing; no other length is offered
Frames49Nothing; the count is given with the length
Frame rate8 frames per secondWhether a higher rate is reachable at all

Inclusion rule. Fields the model card prints in its own specification table. A value a community fork reports is not recorded here, because the card is what this register cites. Order. As the card orders its table.

1A single value makes the arithmetic exact

Every other entry in this column leaves room to negotiate: a range to pick from, a menu, a step. A fixed six seconds means a thirty second slot is five runs and a sixty second slot is ten, with no rounding and no partial last piece.

Exactness is worth something at the planning stage and costs something at the edit. Ten pieces is nine joins, and each join asks a face, a key light and a background to survive a separate inference run that shared nothing with the one before it.

2Eight frames a second is the figure that matters more

The length is the headline, but the frame rate is the number that decides whether the output belongs in a paid placement at all. Eight frames a second is a third of what the other two rows in this register's frame rate column publish, and motion at that rate reads as stepped rather than smooth.

No ad platform this register reads states a minimum frame rate, so nothing rejects such a file on upload. The constraint is on what the picture looks like when it plays, which is a judgement the register records the input to rather than makes.

3Forty-nine frames is why the length is what it is

Printing frames beside seconds shows the length is derived rather than chosen. Forty-nine frames at eight a second is a little over six, and the card rounds it to six. The underlying quantity the model produces is a frame count.

That matters when comparing this row to the other card-published entry in the column, which states frames and never seconds at all. Both are working in frames; one converts for the reader and one does not, and the register keeps that difference visible.

4Where this cell sits in the column

Duration, generator by generatorWhat each generator prints as a length, CogVideoX 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, CogVideoX marked. Nothing on this axis comes from a surface. Recorded 2026-09-22.
Every generator in the register on the duration column, with CogVideoX 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 CogVideoX-5B model card, 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: Google Veo, Grok Imagine.