There is a limit to the number of MediaLivethumbnails that you can view or retrieve. The limit is:
A number of API transactions per second, per account, in one
Region
The transaction limit is shared by all thumbnails — those that you
display on the console, and those that you retrieve using an AWS
API. For the current limit, see the MediaLive page in the Service Quotas
On the console, a thumbnail is generated for a channel only when the channel details page is displayed, and only in the active tab (meaning only for one pipeline in the channel). For the relevant pipelines, MediaLive makes a call to the API approximately every 2 seconds.
