Affected Roles: Administrator
Last Edit: October 22, 2020
If you are encountering considerable video latency with an IP camera that is connected directly to the integrated PoE switch of the VMAX® IP Plus, the issue might be caused by:
This article will outline some investigative steps that you can use to identify the source of the latency issue, as well as troubleshooting that you can perform before contacting DW Technical Support.
**Note: The use of “NVR” in this article refers to the VMAX® IP Plus recording unit.
When encountering video latency issues on the VMAX® IP Plus:
A high level of CPU usage can be caused by record settings such as a high camera bitrate or high resolutions (single-stream).
A camera within the local network should ideally reply in 5ms or less.
**Note: To learn more about connecting with cameras through virtual ports or IP address assignment through the VMAX IP Plus, check out Connecting With Cameras Through Virtual Ports (VMAX IP Plus)
If your investigation of the latency issue reveals a high amount of CPU usage, below are a few troubleshooting methods that you may try.
If the camera is connected directly to the integrated PoE switch of the VMAX® IP Plus, resetting the ports may resolve the issue. To do so:
If you are using the NVR’s Web Viewer to reset the PoE ports:
All IP cameras must have a first (1st) and second (2nd) video streaming profile. The absence of either streaming profile is likely to cause considerable video issues with the camera and the NVR.
To check that the camera is presenting both video streaming profiles:
Click the Get Stream button. As a result, stream information should display in the Rec. Stream and 2nd Stream fields.
If no information displays, further troubleshooting of that camera may be necessary.
If you are using the NVR’s Web Viewer to check for the camera stream profiles:
Stream information should display. If no information displays, further troubleshooting of that camera may be necessary.
The VMAX IP® Plus has a maximum bandwidth limitation of 80 Mbps regarding throughput with its cameras. An exceedingly high bitrate can often cause performance issues for the system.
To lower the camera bitrate:
The IP Camera Stream Setup window will display. Adjust the Bitrate so that it falls between 4000 ~ 6000 bps, then click the Apply button.
If you are using the NVR’s Web Viewer to adjust the camera bitrate:
If your investigation of the latency issue reveals a high ping response time, try the following:
If the issue persists, continue to the next step.
Similar to reinstalling software on a computer, reapplying the camera firmware can often resolve performance issues.
**Note: For more information regarding how to update/apply IP camera firmware, check out Updating MEGApix Camera Firmware.
If the camera replies in less than 5ms, then there may be an issue with the integrated PoE switch of the NVR.
**Note: If the issue persists after performing all troubleshooting steps that are listed above, please proceed with running recovery firmware on the VMAX® IP Plus.
Any issues after this should be reported to Digital Watchdog Technical Support for further assistance.