How does IVS- tripwire work on camera and NVR?

[thlong]

Is it correct that tripwire AI by camera only work to search on camera directly. And AI by recorder is only searchable on NVR?
I hardly find tripwire clips on the NVR if I set AI by camera only.
Also, Sometime when I change setting on the camera using browser/NVR or switch smart plan such as metadata to tripwire, the setting of Camera->image-> exposure/daynight/illuminator is reset to default. Does this suppose to happen or something else cause that?

camera is IPC-B52IR-Z12E S2
NVR is DHI-NVR5216-16P-I

TIA

 

[bigredfish]

Both ways should be able to search on the nvr if settings are correct. But each IVS rule must be set to “record” and the nvr storage and schedule settings must be set to record the camera channel.

Sometimes settings sometimes do change when switching from IVS to Metadata but should be minimal. Seems like a bug, but minor.

Show picture of your camera IVS settings and NVR storage schedule and Record tab.

 

[thlong]

Both ways should be able to search on the nvr if settings are correct. But each IVS rule must be set to “record” and the nvr storage and schedule settings must be set to record the camera channel.

Sometimes settings sometimes do change when switching from IVS to Metadata but should be minimal. Seems like a bug, but minor.

Show picture of your camera IVS settings and NVR storage schedule and Record tab.

This is on camera (sorry, this is at night):

IVS1 (I draw this using the NVR)



IVS2. For some reason, I can't draw IVS on camera web interface anymore. So it looks like the image below.




Search result show hundreds of tripwire event.



On the NVR:

IVS 1 setting






IVS 2 setting






IVS schedule is the same on both




Search result on NVR show only a few events

 

[wittaj]

Not related to your issue, but it appears you are using it on a camera for LPR?

If so, with the tight field of view it can be problematic.

And at night forget it as the AI for a vehicle wasn't designed for seeing just the plate and head/tail light.

 

[thlong]

Not related to your issue, but it appears you are using it on a camera for LPR?

If so, with the tight field of view it can be problematic.

And at night forget it as the AI for a vehicle wasn't designed for seeing just the plate and head/tail light.

Does the NVR only record tripwire if it recognizes car or human?

It almost doesn't record to the NVR at all during the day. I want to filter out motion detection such as birds , rabbits, and tree leaves shadow.

On the camera, it records every tripwire I think. it even records some at night which I can just do motion detection searching.

 

[wittaj]

Whether IVS is done by Camera or NVR, they are designed to trigger on car or human.

But when using for LPR, it can be problematic because the field of view is so tight. You either need an overview camera to trigger the LPR or just accept you will get a false on there from time to time.

But they should be drawn in the camera and not the NVR. And then reboot the NVR when complete to have the NVR pull the latest from the camera.

 

[thlong]

Whether IVS is done by Camera or NVR, they are designed to trigger on car or human.

But when using for LPR, it can be problematic because the field of view is so tight. You either need an overview camera to trigger the LPR or just accept you will get a false on there from time to time.

But they should be drawn in the camera and not the NVR. And then reboot the NVR when complete to have the NVR pull the latest from the camera.

I don't know what I did but I can no longer draw it properly on the camera. It let me draw 3 points, then I have to pick the next point some where around the three points. That's why my second IVS looks crazy lol.

 

[bigredfish]

Yes, the NVR IVS only does human or vehicle.

Something is not right.

First you should only set IVS on the camera.
Do not touch IVS on the NVR at all. (Only for cameras that do not have IVS)

Problem is we don’t know what all you have done.

I would:
Factory reset NVR
Make sure MD/SMD Is Off on NVR completely
Don’t touch any settings for cameras on NVR

Factory reset Camera
Make sure and do ALL settings on camera
MD/SMD OFF on camera
Make sure camera is set to:
H.264h
8192 bitrate
CBR
ROI OFF
Set IVS rules ON Camera
Add Event linkage “record”
Save, refresh 3x

Reboot NVR

test again

 

[thlong]

Factory reset Camera
Make sure and do ALL settings on camera
MD/SMD OFF on camera

Does MD have to be off on camera? I want it to record MD events at night

 

[bigredfish]

Yes just until we solve the IVS problem.

Too many buttons have been pushed. Have to start slow one thing at a time to determine problem. And SMD running at same time as IVS WILL make weird things happen.

 

[thlong]

Yes just until we solve the IVS problem.

Too many buttons have been pushed. Have to start slow one thing at a time to determine problem. And SMD running at same time as IVS WILL make weird things happen.

I reset both camera and nvr:

• Camera only recorded 41 tripwire event. Usually, it should be around 150- 200 event.
• NVR did not have any tripwire event.

Should I add some more tripwire on the camera?
(I figure out why I could draw tripwire properly on camera: without plugin for the browser, it will cause that )

 

[bigredfish]

So tripwire IS working. But you’re missing some events.

Very hard to say why without seeing your picture of IVS . Try drawing more lines and zig zag if direction isn’t important.

 

[thlong]

So tripwire IS working. But you’re missing some events.

Very hard to say why without seeing your picture of IVS . Try drawing more lines and zig zag if direction isn’t important.

This is a sample of tripwire recorded by camera. (NVR didn't record anything though)
View attachment tripwire sample.mp4

 

[bigredfish]

No I mean see the IVS rule lines

Did the original problem stop?? (The false alerts of stationary vehicles)

What do you mean by NVR didnt record anything? Was there no hash mark on the playback time line, or no images in the AI search?
Are you recording full time plus IVS/Intelligent?
Are you recording ALSO to the camera SD card AND the NVR?

You should be creating your IVS rules ONLY on the camera.
Make sure each rule has the "record" box checked, and the Schedule is 24/7 ON the Camera

The go to the NVR and make sure the record schedule is set and the Record Mode is set

 

[thlong]

No I mean see the IVS rule lines

Did the original problem stop?? (The false alerts of stationary vehicles)

What do you mean by NVR didnt record anything? Was there no hash mark on the playback time line, or no images in the AI search?
Are you recording full time plus IVS/Intelligent?
Are you recording ALSO to the camera SD card AND the NVR?

You should be creating your IVS rules ONLY on the camera.
Make sure each rule has the "record" box checked, and the Schedule is 24/7 ON the Camera

The go to the NVR and make sure the record schedule is set and the Record Mode is set
View attachment 196984 View attachment 196985

I'm sorry I may have confused you, I didn't have false alerts of stationary vehicles. When I say the camera, I mean the sd card. The camera did record IVS to the sd card. The problem is the NVR didn't have any IVS events or just a few.

IVS setting




-NVR records full time and Intelligent (MD is in there but I haven't enable it in the camera)





- There was no hash mark on the playback



- There was no result in AI search

 

[bigredfish]

1- that image is way too dark for IVS to work well
2- I see some IVS intelligent hash marks on the NVR timeline.
3- the record schedule, is that (channel #1) for the camera in question? Each channel is separate

The fact that you are getting some IVS events on the NVR but more in the camera as card makes me think it’s a timing thing of some sort

I would shut off the recording to the camera sd card temporarily and focus on getting consistent recording on the NVR.

Is the camera plugged into the NVR poe port directly?

Show us a pic of the AI parameters for that channel from the NVR as they are

 

[thlong]

1- that image is way too dark for IVS to work well
2- I see some IVS intelligent hash marks on the NVR timeline.
3- the record schedule, is that (channel #1) for the camera in question? Each channel is separate

The fact that you are getting some IVS events on the NVR but more in the camera as card makes me think it’s a timing thing of some sort

I would shut off the recording to the camera sd card temporarily and focus on getting consistent recording on the NVR.

Is the camera plugged into the NVR poe port directly?

Show us a pic of the AI parameters for that channel from the NVR as they are

1. Yep, I'm not expecting to get IVS events at night
2. you are right, there are intelligent records. But I did not see anything when I did AI search -> IVS
3. yes, it's channel #1.
- Camera is on a separate poe switch

AI parameters














Somehow video metadata is enabled on this camera. I haven't not touched any of this since I factory reset the camera and NVR.






I didn't enable people counting either





I also didn't enable ANPR

 

[bigredfish]

Sorry had to go to bed last night

So thank you for that.
Obviously too much going on at once with that channel !

This is one of my concerns with the new AI enabled NVRs, too many choices not enough detailed instructions.

One thing at a time.

• Make sure all AI functions by recorder are off. Make sure MD/SMD by recorder are off.
• Setup IVS On Camera like you want, with it recording to the sd card
• Make sure Record schedule and mode are set for that channel in the NVR
• Test.

You should see same IVS events on as card as on NVR timeline and I believe on NVR AI search. That’s how my “dumb” non-AI NVRs work.

NVR AI shouldn’t need to be enabled for NVR to record AI events the camera detects.

AI by recorder should primarily be used for cameras that don’t have AI capability

 

[thlong]

Sorry had to go to bed last night

So thank you for that.
Obviously too much going on at once with that channel !

This is one of my concerns with the new AI enabled NVRs, too many choices not enough detailed instructions.

One thing at a time.

• Make sure all AI functions by recorder are off. Make sure MD/SMD by recorder are off.
• Setup IVS On Camera like you want, with it recording to the sd card
• Make sure Record schedule and mode are set for that channel in the NVR
• Test.

You should see same IVS events on as card as on NVR timeline and I believe on NVR AI search. That’s how my “dumb” non-AI NVRs work.

NVR AI shouldn’t need to be enabled for NVR to record AI events the camera detects.

AI by recorder should primarily be used for cameras that don’t have AI capability

No worries! Thanks your the help

I'll check all the setting again. Maybe AI cam and AI NVR fight each other lol.