Subscriber Discussion

Video Delay On IP Cameras Live View Hybrid DVR

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Michael Sahli
Mar 21, 2018

I recently replaced a 4 Channel analog dvr with an 8 Channel Hybrid, added 2 ip cameras and the ip cameras have a delay of anywhere between 2-10 seconds on the local monitor.  I've messed with various stream settings for fps and bitrates bringing them way down and the issue seems to go away after a restart of the camera, then it's back after about 6-8hours of runtime.  Any ideas?  It's an LTS recorder and LTS Cameras updated on firmware.

(1)
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Sean Patton
Mar 21, 2018

 We looked into IP video latency a few years ago (IPVM IP Video Latency Tested). To distill our findings down simply:

Key Findings

Here are the key findings from the test:

  • In a simple, lightly loaded local system, latency from IP camera to VMS typically were 300 - 400ms.

After the 6-8 hours of run time, does the latency remain relatively constant per camera? You mention 2-10 seconds. 2 seconds is a very long time, but a range up to 10 sounds like a definite NVR issue, especially if it is present on all cameras.

You aren't running 2 4K resolution cameras on an NVR not meant to support them, or some outlier condition?

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Michael Sahli
Mar 21, 2018

After the 6-8 hours yes the latency remains pretty constant.  At first it was one IP Camera then the other (with delay).  Now it's being reported as just one of them.  I'll be headed out on-site to do some more testing.  I'm leaning on your suggestion that it might be the NVR.

JH
John Honovich
Mar 21, 2018
IPVM

Try (1) disconnect a camera from the NVR, (2) connect to that same camera via web browser, (3) check latency on the camera displayed in the web browser. I am pretty sure what you will find is minimal latency on the web browser display further pointing to an NVR issue.

(1)
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Sean Patton
Mar 21, 2018

(Speaking as someone with no LTS/Hikvision NVR experience) It sounds like a memory cache or buffer is filling up over time and not resetting, possibly a sign of faulty RAM or HDD. Once you restart the stream, the buffer resets and you're back to step 1 until it fills up again.

(1)
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Michael Sahli
Mar 21, 2018

*And no not 4k Cameras, 4mp dumbed down to 1080(2mp)

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