Dahua Starlight (IPC-HDW5231R-Z) -- Blue Iris config question

[NVR990]

So, I've installed this Dahua cam, at the recommendation of many folks on this board. It works great, so thanks!

One question, though. Sorry if this is a noob issue, but when I go into Status > Cameras on Blue Iris, I see a "key" value of 0.50. All of my other cams, show a "key value" of 1.00.

See attached screenshot for clarification.

Can someone please explain to me what this means?

Thanks!

 

[fenderman]

So, I've installed this Dahua cam, at the recommendation of many folks on this board. It works great, so thanks!

One question, though. Sorry if this is a noob issue, but when I go into Status > Cameras on Blue Iris, I see a "key" value of 0.50. All of my other cams, show a "key value" of 1.00.

See attached screenshot for clarification.

Can someone please explain to me what this means?

Thanks!

If you match the iframe to the fps it will show 1

 

[NVR990]

If you match the iframe to the fps it will show 1

Thanks, that definitely was the issue! So, "key" is really just the ratio of FPS to iFrame Interval.

When I log into the Dahua camera to adjust settings, I notice that the Dahua camera interface defaults to an iFrame interval of 2x the frame rate (which Blue Iris calls "key" of 0.5). Though it is possible to override this default setting by manually entering a new iFrame value.

 

[jrf]

In case you really wanted to know what was going on:

What is an Iframe