# Resolution, aspect ratio and duration (/docs/generating/resolution-duration)







These three settings decide the size and shape of your output, and for video, how long it runs. They also affect speed and, in the cloud, cost.

## Resolution [#resolution]

Resolution is the level of detail, offered as tiers such as 480p, 720p, and 1080p.

* **Higher resolution** means more detail but slower generation and, in the cloud, a higher [cost](/docs/cloud-credits/generation-cost).
* **Lower resolution** is great while you experiment. Raise it for the final result.

<img alt="The resolution tier selector" src="__img0" />

Each preset exposes the resolutions it supports. SimpliGen always generates at one of the offered tiers.

## Aspect ratio [#aspect-ratio]

Aspect ratio is the shape of the frame, such as 1:1 (square), 16:9 (wide), or 9:16 (tall). Pick the one that fits where the result will be used, for example 9:16 for phone or story formats and 16:9 for widescreen.

## Duration (video) [#duration-video]

For video presets, duration sets how long the clip runs.

* Longer clips take longer to generate and cost more in the cloud.
* Some presets work in fixed chunks, so the slider snaps to whole steps and the label rounds to the nearest second.

<img alt="The duration control for a video preset" src="__img1" />

Start short while testing, then extend once you are happy with the motion and style.

## Why these are capped [#why-these-are-capped]

The available resolutions, aspect ratios, and durations come from each preset's own menu. SimpliGen keeps your choice inside that menu so generations stay reliable and, for cloud, priced correctly.