Viewerframe Mode — Refresh //top\\

: Attempts to stream "Motion JPEG" (MJPEG), which provides a continuous video-like experience by sending a rapid succession of JPEG images.

, 10000); // Check every 10 seconds

Modern browsers (Chrome, Edge, Firefox) have largely moved away from NPAPI plugins (like ActiveX or Java). Many older IP cameras rely on these plugins. If the "viewerframe" fails to refresh, you often see a "Plugin not supported" or a black box where the video should be. How to Troubleshoot Viewerframe Issues viewerframe mode refresh