Dahua N3wbie , can’t figure out why IVS events won’t record

[bigredfish]

There’s no one right or wrong answer in IVS lines because each scene is wildly different and users have different objectives.

Experimenting since IVS came out, I still successfully use zig zag tripwires a lot and if you can keep the 3D effect in mind when drawing them, they are quite effective.

My most common method is an intrusion box around the base of the perimeter with zig zag tripwire inside of it.

 

[duplo]

You are joking right? He's literally the Dahua rep in the UK, lol.

I know who the bald guy is.
But give someone a title doesnt make him an expert.

He just say something but didnt show a side by side comparison. How could you tell that he is right ?

Like @bigredfish mention scenes differs, scenes change over time (light) .. what works for one must not work for another.

Zig-zag lines are used here by many. I use them. Works fine.

I dont see why a long line eats up more CPU than a short, like the bald guy say.

 

[Carcus]

I know who the bald guy is.
But give someone a title doesnt make him an expert.

He just say something but didnt show a side by side comparison. How could you tell that he is right ?

Like @bigredfish mention scenes differs, scenes change over time (light) .. what works for one must not work for another.

Zig-zag lines are used here by many. I use them. Works fine.

I dont see why a long line eats up more CPU than a short, like the bald guy say.

So he works for the company that manufactures the products but he has no credibility, righto.

 

[Chokolinho]

Second image is directly on the camera web interface.

Yes, that's right. My recordings look like this overnight.

 

[duplo]

Hookup has so many likes and subscriptions on youtube, he must be right.

righto.

 

[bigredfish]

Yes, that's right. My recordings look like this overnight.

That was due to your MD record schedule not being 24/7

 

[Chokolinho]

That was due to your MD record schedule not being 24/7

I have set 24/7 in the Nvr. I have switched everything off in the camera menu.

 

[bigredfish]

I dont disagree with anything Chris said in his video. I have watched him on numerous videos and he's very knowledgeable.

The two primary things he called out, leaving room for detection from edge of scene, and minimizing # of lines to conserve onboard RAM/ROM is valid. and we routinely advise same

But what he leaves out in that particular clip is the multiple entry points and relying on a single intrusion box and most importantly, the success ratio of detection..
Real world has told me a single intrusion intrusion zone over a fairly large area is rarely the most reliable detection method by itself. Zig Zag of a single line within an intrusion zone has proven to be most reliable for me across many scenes. And a zig zag made from a single tripwire rule is no more processor intensive than a simple straight line, its still one line and one rule.

 

[bigredfish]

I have set 24/7 in the Nvr. I have switched everything off in the camera menu.

Yes, you are recording to the NVR, good

 

[bigredfish]

This is a terrible way to setup the IVS rules.

Check Chris from Dahua in the UK he does a great video on this.

Chris Flavelle on LinkedIn: A.I. Tripwire (IVS) Tips & Tricks to make your Tripwires work better… | 31 comments

A.I. Tripwire (IVS) Tips & Tricks to make your Tripwires work better. IMPORTANT to know about the obstacles in the FOV including the FOV itself. More to follow… | 31 comments on LinkedIn

www.linkedin.com

Agree on this being a bad use of rules.

On this one his problem is the poor detection capabilities of the 180 camera more so than the rules, thus he was trying overkill to get it to work. The 180 cameras apparently suck at IVS

 

[Carcus]

I dont disagree with anything Chris said in his video. I have watched him on numerous videos and he's very knowledgeable.

The two primary things he called out, leaving room for detection from edge of scene, and minimizing # of lines to conserve onboard RAM/ROM is valid. and we routinely advise same

But what he leaves out in that particular clip is the multiple entry points and relying on a single intrusion box and most importantly, the success ratio of detection..
Real world has told me a single intrusion intrusion zone over a fairly large area is rarely the most reliable detection method by itself. Zig Zag of a single line within an intrusion zone has proven to be most reliable for me across many scenes. And a zig zag made from a single tripwire rule is no more processor intensive than a simple straight line, its still one line and one rule.

I find the single intrusion zones to be very effective.

If a person isn't being detected then it's outside of the cameras detection range or bad lighting.

 

[Carcus]

Agree on this being a bad use of rules.

On this one his problem is the poor detection capabilities of the 180 camera more so than the rules, thus he was trying overkill to get it to work. The 180 cameras apparently suck at IVS

We use the 180 with building sites using solar rigs. Very effective.

These cameras love to be elevated with no obstruction.

Limitation is 10-12m detection range.

 

[bigredfish]

I’ll defer to you as I haven’t used one just going by real world reports here.
Agree lighting is the most important factor of all. If properly lit, lots of things work as they are intended, including my foot banging the dresser at 2:30 am this morning when a perimeter alarm went off

 

[Carcus]

I’ll defer to you as I haven’t used one just going by real world reports here.
Agree lighting is the most important factor of all. If properly lit, lots of things work as they are intended, including my foot banging the dresser at 2:30 am this morning when a perimeter alarm went off

Ouch!

And unobstructed view of the area they're monitoring, Dahua cameras really love being elevated, detection range increases when elevated, not always ideal especially down sides of homes but tis what it is.

 

[Chokolinho]

That's what happened today. I think I need to move the box further down.

 

[bigredfish]

Sure

 

[Chokolinho]

Sure

What do you think about these two rules? Just lower the box a little or change it completely?

 

[bigredfish]

If it works leave it. I wouldnt think that Intrusion box would pick up targets over there, likely wont at night. Its a camera placement thing. Trying to see targets what 60-75ft away? with a camera made to see stuff inside of 30ft.

You probably dont need so many zags in your tripwire if its just to catch humans coming up that drive

 

[Chokolinho]

If it works leave it. I wouldnt think that Intrusion box would pick up targets over there, likely wont at night. Its a camera placement thing. Trying to see targets what 60-75ft away? with a camera made to see stuff inside of 30ft.

You probably dont need so many zags in your tripwire if its just to catch humans coming up that drive

No, I just liked that it triggers when someone walks into my driveway. I have adapted it slightly.

 

[d5775927]

No, I just liked that it triggers when someone walks into my driveway. I have adapted it slightly.

You can also use the min/max size, to discard detection of human who is far away.
If a human is far away, its size will be smaller than if he is close to the camera.