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Lag time on Vbrick

Lag time on VBrick for desktop but not laptop? Why after installing a new Vbrick 9000 which is the newest broadcast system for us and this all runs through a Cisco 800 switch. It seems the desktop while sitting in front of the camera to watch the broadcast, has a lag time of maybe a minute or longer yet the laptop which is on Wi-Fi is real time?
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Fractional CTO
CERTIFIED EXPERT
Distinguished Expert 2019
Commented:
Lag time is likely normal.

You'll almost always have lag time if you're running h.264 compression. Running h.265 will be even more of lag.

Compression takes a lot of CPU power + compression lag is still better than trying to pump raw video frames down a connection.

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Commented:
What then would allow real time on a laptop but slower lag on a desktop?

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Commented:
Author, if you can answer  my last question, you win the prize.

Author

Commented:
Sorry, I thought I closed it out. Excellent answer.
David FavorFractional CTO
CERTIFIED EXPERT
Distinguished Expert 2019
Commented:
Speed relates to several factors.

1) Connection speed between your device + computer (laptop or desktop).

If your connection is slow, then you'll have to adjust your resolution (height + width + pixel density) so you have no data loss.

2) Compression codec.

If you save raw files (like mpeg4 raw frames) there will be no compression, so very little CPU + Memory burden.

Files will be larger, so more Disk I/O + storage size burden.

3) CPU thread count + clock speed.

4) Amount of memory.

5) Disk I/O speed.

If you're doing realtime compression, #3-#5 come into play.

For example, using h.264 compression works well with low CPU + memory load for an easy 50%+ compression.

Using h.265 requires heavy CPU usage + more memory, for 90%+ compression with no visual difference for h.264 compression.

Summary: If you can just throw money at the problem, go for h.265 compression. Just be sure you have good cooling for you CPU + memory as they'll be running at max during h.265 compression for must longer times than h.264 compression.

Author

Commented:
This was the best explanation I have ever heard. It not only works for what my issue was but for troubleshooting time out issues and other apps that lag. On a network. just perfect. Another reason why I still love this site after retiring and coming back out to help in schools where this really happens all the time. More so than private sector work. I now have 6 techs who now understand why. Excellent work David. After all the years I have been networking, I have missed a few things it seems. Maybe over a few heads but they get the idea. Thanks again.

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