Report ID: VFR-2026-04-01
Subject: Validation of Refresh Mechanisms in ViewerFrame Operational Modes
Status: Verified / Conditional Pass
Overview
1. Stream Synchronization
VMS software connecting to thousands of cameras often uses this command to "flush" the video pipeline. If a camera has been offline or buffering due to network latency, sending a refresh verified command ensures that the first frame displayed to the security operator is current and intact. viewerframe mode refresh verified
Fix: Use "IE Mode" in Microsoft Edge or a dedicated camera management software (CMS). Refresh with No Changes : Mode=Refresh : This
/axis-cgi/jpg/image.cgi)This is the standard Common Gateway Interface (CGI) script used by the Axis embedded Linux platform to retrieve still images or streams. Unlike the video.cgi (often used for H.264), image.cgi is primarily designed for individual JPEG retrieval or MJPEG streams. creating a pseudo-video stream.
The viewer frame mode refresh rate, often simply referred to as the refresh rate, measures how many times a display updates the image on the screen per second. It is expressed in Hertz (Hz) and is a crucial parameter in determining the quality of the visual experience. A higher refresh rate results in a smoother and more stable image, reducing the likelihood of motion blur and eye strain. Common refresh rates include 60Hz, 120Hz, 144Hz, and 240Hz, with higher rates becoming increasingly popular in gaming monitors, virtual reality (VR) headsets, and other applications where smooth motion is critical.
Mode=Refresh: This parameter instructs the browser to continuously reload the image at a set interval, creating a pseudo-video stream.