How a spec sheet turns into a production decision

These pages cover the reasoning that sits between a spec sheet and a shoot decision. The numbers are simple; what they imply for a schedule is not. As of 2026-09-12.

Fig. 1 Five seconds is a brief disguised as a technical limit, and it decides what gets generated first.

The skip threshold is the clearest example. A platform that allows a skip after five seconds has effectively published a brief: the first five seconds carry the message, and everything after them is optional. No generator documentation mentions this, and it changes what should be generated first.

Assembly is the other recurring decision. When a placement runs longer than a single generation, the work becomes an edit with continuity requirements, and those requirements decide which generator is suitable long before quality does.

Resolution and ratio round out the set. Both are cheap to get right at the brief stage and expensive to fix after a render, which is the reason they appear on the sheets at all.

1The explainers

One master, many cuts — Placement variants cost a re-generation each unless the master was framed for them.
Failing at upload — Uploads reject on file properties, not on the idea.
Writing for a skip — Short ad formats settle their billing in the opening seconds.
Delivery checklist — Ad platforms reject files for reasons unrelated to the creative.
Where a series goes — Micro-drama apps, Shorts, TikTok and licensing each want a different cut, a different cadence and a different disclosure.
How a series earns — Platform revenue share, unlocks, brand work and licensing.
Reading a duration cell — A ceiling, a range, a menu, an increment and a fixed value all look the same in a column of seconds, and a shot list is written differently against each.
What not stated means — A blank column is a statement about a page, not about a product.
Rate cards and references — One page says what a request costs and the other what a parameter accepts.
Rounding up a call count — Dividing a slot by a clip ceiling and rounding up answers one narrow question well and three others not at all.
Pairs and ratio names — A ratio name is comparable and lossy.
Frames and seconds — Converting frames to seconds is one division and it throws away the rule that decides which lengths are legal.
Why a ladder exists — Resolution appears on almost every page because it is priced.
Planning a join — Every extra call in a piece is a seam, and each seam asks separately generated footage to agree about a face, a light and a background.
Safe areas — Interface elements sit over the top and bottom of a vertical ad.
Inputs and outputs — A limit on what can be supplied to a model says nothing about the size of what comes back, and a delivery check needs the second figure.
Retention clocks — Some pages state how long output stays fetchable and most do not.
What a default commits to — A published default is a specification.
Reading a minimum — A platform minimum is a gate a file must clear.
What a scene means — A figure per scene, per clip, per request or per job are four different statements, and the unit decides whether assembly is included.
The crop that costs — Cropping changes which part of the frame survives, not how tight it looks.
Tier names — Two pages can both publish 1080p and mean different pixel counts, aspect handling and encode settings.
Sound with the picture — Some generators return sound with the picture.
A fixed format — Where size, rate and length are single values, every request returns the same kind of file.
Billing and iteration — Where output is charged by the second, framing is settled short and the length raised once.
Where cuts get placed — A piece assembled from several calls has cuts an editor placed.
Why dates matter — Specification pages change without announcements.
Conditions in the cell — A ceiling available only at a tier, on a version or with a particular identifier is a conditional ceiling, and the condition has to travel with it.
What a sheet cannot settle — Fit is arithmetic on published figures.

None of these pages adds a number to a sheet. They exist so the numbers already there reach a production plan intact.

Elsewhere in the kit: Placements, Tools, Axes, Pairs, Questions, Terms, Data. How a spec gets onto a sheet is set out on the method page.

2A generator's ad pipeline

For ad work around “Learn”, SceneMixer's pages explain how its ad projects are produced:

A micro drama (vertical drama) is a serialized show of 60–120 second episodes shot for phones.
SceneMixer, The AI Micro Drama Production Pipeline (read 2026-10-13)

The shot seconds in the storyboard add up to the segment length, so editing them changes it.
SceneMixer, Fixing One Shot Without Redoing Everything — “Can I change the duration of a segment?” (read 2026-10-13)