Why is it that when I buy a pair of Dahua cameras - with different lenses - one has IVS and the other doesn't?

[sumguy]

Back in 2016 I bought a pair of 4mp turret Dahua cameras. I think they were 4431, China-market with hacked firmware. They were identical except one had 2.8mm lens, the other had 3.6 mm lens. When I got them I found that one had all the various IVS detection features, the other didn't.

Fast forward to today. I received a pair of HDW2431T. One is branded with Dahua logo (2.8 mm lens) and the other is "white-box" with no Dahua logo (3.6 mm lens). The white-box camera does not have any IVS features, the Dahua camera does.

White-box camera:
System Version
V2.800.0000000.16.R, Build Date: 2020-04-18
WEB Version
V3.2.1.880675

Dahua camera:
IPC-HDW2431T-AS-S2
System Version
V2.800.0000000.14.R, Build Date: 2020-02-29
WEB Version
V3.2.1.857734

When I do a manual firmware check on the generic camera, I get "It is the latest version". When I do a manual check on the Dahua I seem to get a time-out error - like it couldn't connect to what-ever server to check on firmware.

Is it possible to get IVS functionality on the generic camera by getting ahold of a different firmware file?

 

[tigerwillow1]

I've bought about 20 Dahua cameras, chinese market and international, different focal lengths, and haven't had any that don't support IVS. Based on that, I think it's a configuration issue. The first thing usually suggested is to verify that Smart Plan is enabled.

 

[fenderman]

disable smart codec.

 

[sumguy]

Yes, thank you. Disabling the smartcodec did activate the IVS menu options in the web interface.