# Requirements for thumbnails
Requirements

## Requirements for the video source


For MediaConnect to successfully generate thumbnails, make sure that the video source meets the following requirements.

[\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/mediaconnect/latest/ug/thumbnails-specifications.html)

## Requirements for the flow


To successfully generate thumbnails, make sure that your flow meets the following requirements.


| Characteristic of the flow | Requirement | 
| --- | --- | 
| Type of flows that support thumbnails | Any type of flow except CDI flows. | 
| Maximum number of outputs that can be attached to the flow | 10If the flow exceeds this limit, then MediaConnect won't generate any thumbnails for this flow. | 
| Maximum bitrate for all the outputs that are attached to the flow | 400 MbpsIf the flow exceeds this limit, then MediaConnect won't generate any thumbnails for this flow. |