Controlling Ptz over the internet

[GH75]

We use Dahua and smart pss almost exclusively.

We are considering installing multiple Ptz for a community that will have guards live viewing. But the guards will be several blocks over and wireless is not an option due to line of sight, bandwidth etc.

So they will be controlling the Ptz over the Internet. Seems like the Ptz are slow and twitchy over the net, not like on sight where they respond quickly.

Could this be due to us using the pss software versus a dedicated Ptz controller?

any ideas or thoughts?

 

[nayr]

its because your going over the internet.. PTZ's need very little latency to feel responsive and quick, you get that over local network and even that is slower than the previous generation of analouge PTZ's just due to the nature IP.

typical lan latency:

PING west-ptz (192.168.42.21) 56(84) bytes of data.
64 bytes from west-ptz.galileo.nayr.net (192.168.42.21): icmp_seq=1 ttl=64 time=0.300 ms
64 bytes from west-ptz.galileo.nayr.net (192.168.42.21): icmp_seq=2 ttl=64 time=0.282 ms
64 bytes from west-ptz.galileo.nayr.net (192.168.42.21): icmp_seq=3 ttl=64 time=0.304 ms
64 bytes from west-ptz.galileo.nayr.net (192.168.42.21): icmp_seq=4 ttl=64 time=0.295 ms

typical internet latency:

PING kernel.org (199.204.44.194) 56(84) bytes of data.
64 bytes from yul-korg-pub.kernel.org (199.204.44.194): icmp_seq=1 ttl=48 time=55.6 ms
64 bytes from yul-korg-pub.kernel.org (199.204.44.194): icmp_seq=2 ttl=48 time=55.3 ms
64 bytes from yul-korg-pub.kernel.org (199.204.44.194): icmp_seq=3 ttl=48 time=55.3 ms

you can see just going over the internet is going to introduce ~200x the latency.. point to point wireless backhaul would be better, but it would still be noticeably less responsive.. but as long as you insist on controlling via internet there is practically nothing you can do to help this issue.

thats a best case example, yours could be much worse.. if your saturating outbound bandwidth with video streams your latency times could be worse than 1/4 second (250ms) all the way up to a few seconds of delay.