Security and Surveillance: IP cameras often use viewerframes to stream live MJPEG or H.264 video. A refresh command prevents the stream from "freezing" or displaying a stale image if the network connection flickers.
The mode parameter typically dictates how the content within that frame behaves. When set to refresh, the system is instructed to bypass cached data and pull a fresh version of the content from the server at a predetermined interval or upon a specific trigger. The Role of the Top Parameter viewerframe mode refresh top
This is particularly important in security applications. If a viewer is monitoring multiple camera feeds, using a top-level refresh ensures that the timing of the video frames stays consistent across the entire dashboard, preventing lag between different angles. Common Use Cases for Refreshing Viewerframes Security and Surveillance: IP cameras often use viewerframes