When is Hardware Acceleration Used in BI?

[PSPCommOp]

Ahh, I see. So it's being used as a substitute for effective review and search methods? Cool. Different strokes for different folks and all. Thats probably fairly effective for small systems, it won't scale though which explains why I see people asking about 20+ camera systems being advised to keep resolution and/or frame rate low so BI can keep up.

Can you switch it off?

Most folks here are using them for home security. Not nuclear power plant security or casino/bank security employing several people to constantly monitor. Even most stores have security systems and lack 24/7 monitoring. I've taken calls from Walmart Loss Prevention reporting thefts 2-3 days after the actual event when they've made video timelines of the person entering the store all the way thru to the concealment and then exiting the store.

Point being most home security systems here are reactive as opposed to examples of proactive security. That's why, like fenderman pointed out, we pay 100-200 for cameras and 45-60 for BI VMS Software and keep systems under 2000. If you can see that you're comparing apples to oranges, I got nothing else.


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[fenderman]

I've taken calls from Walmart Loss Prevention reporting thefts 2-3 days after the actual event when they've made video timelines of the person entering the store all the way thru to the concealment and then exiting the store.

How was the video quality...the walmart and target video ive seen is beyond horrific. They are using 10 year old systems...shame.

 

[PSPCommOp]

How was the video quality...the walmart and target video ive seen is beyond horrific. They are using 10 year old systems...shame.

Last six years I've worked 3 different counties with 4 different stores. I've found their Interior cameras provide minimal quality. Most are PTZ that revert back to certain areas of coverage when not being actively monitored. At MOST 1080p with VERY basic recognition, skin color, clothing, possibly blurred tattoos and enough definition to make out some items in their carts (some would just fill the entire cart with shit and just walk right out). I'd imagine 6-12mm lenses at the very most.

Exterior cameras are much more improved. Good enough to catch license plates at most any time of day. One store actually had a single lane driveway to get in and out of the parking lot and actually had a really nice bullet camera to get all plates exiting. Pa Vehicle Code only requires reg plates on the back bumper not both back and front like NJ. So they used one camera on the corner of the building angled down that driveway and toward the road to catch plates of all vehicles exiting the grounds as they drove away.

Most Walmart LP workers I've dealt with were trained extremely well in their VMS so when we arrived they'd basically hand us a list of the item(s) taken along with a DVD of all the clips sequentially clipped together from the suspect entering the store, committing the theft and their subsequent exit. Once outside one of the non PTZ exterior cameras would record the color style and model vehicle they'd get into. At that point the last clip was video of that vehicle driving out of the parking lot and a high frame lens covering the exit would get the plate.

Once we have the vehicle registration it's just a matter of getting the vehicle owners info, finding out where they live and comparing DL photos of occupants of that residence to the security footage. Go to the house for positive ID and boom, charges filed. Usually if you took photos and showed them to the suspects they'd come clean and just plead guilty once they were charged.


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[Chuck Claunch]

The thing I don't get is the many of the cameras do the full blown motion detection on board. Seems more efficient to let the camera do it (presumably pre-encoding). Just my very limited $0.02 as I'm just getting into this stuff and building my home system.

 

[fenderman]

Ive never seen 1080p video from walmart around here...i got ptz footage from a target but it was really low res...

 

[fenderman]

The thing I don't get is the many of the cameras do the full blown motion detection on board. Seems more efficient to let the camera do it (presumably pre-encoding). Just my very limited $0.02 as I'm just getting into this stuff and building my home system.

That only works if the camera has advanced analytics..the motion detection available on 100 dollar cameras is a joke. Blue iris provides many more options to dial it in, as well as profiles that allow completely different settings for day/night, alerts vs recording etc.

 

[Brad_C]

Seems more efficient to let the camera do it (presumably pre-encoding).

Here's an odd thing. None of the cameras I've tested have done any detection or analytics pre-encoding. The easy way to test this is to set an ROI such that there is a reasonable part of the image that has deliberate degradation. Now set your I-frame interval long enough that you get snap changes in the non ROI part each tie there is an I-frame. Set up the motion detection on that part of the image and you'll find it triggers most times there is a snap refresh.

So it at least *appears* the motion detection is applied post-encoding, or more likely is taken from an intermediate part of the encoding process (after all, the encoding is specifically looking for changes in the image so you're already half way there).

 

[Chuck Claunch]

The manual (pg 82) for the camera I'm about to receive (Hik DS-2CD2342WD-I 4mm) shows it has dynamic motion analysis with selectable regions and sensitivity levels as well as separate day/night settings and up to 8 different timing periods per day. It also lets you take several different actions upon triggers. The datasheet claims the following under "detection": Intrusion detection, Line crossing detection, Motion detection, Dynamic analysis. Maybe it does suck though I am not sure. Have any of you guys ever tried the onboard motion detection or are you just assuming because the camera is cheap it sucks?

 

[fenderman]

The manual (pg 82) for the camera I'm about to receive (Hik DS-2CD2342WD-I 4mm) shows it has dynamic motion analysis with selectable regions and sensitivity levels as well as separate day/night settings and up to 8 different timing periods per day. It also lets you take several different actions upon triggers. The datasheet claims the following under "detection": Intrusion detection, Line crossing detection, Motion detection, Dynamic analysis. Maybe it does suck though I am not sure. Have any of you guys ever tried the onboard motion detection or are you just assuming because the camera is cheap it sucks?

Ive got a bridge to sell you...We are not assuming....
All they day/night settings are useless unless you setup a script to change the settings based on sunrise sunset...(blue iris has this function built in)

 

[Brad_C]

Have any of you guys ever tried the onboard motion detection or are you just assuming because the camera is cheap it sucks?

I use it on Hik R0 (2332/2532), R3 (4526/6026) & R4 (4332) cameras and it sucks on all of them. The 4-Line units are the expensive ones with the super-duper all singing and dancing analytics on board. They still suck outdoors or in rooms with windows.

I make it work passably by combining motion, line-cross & intrusion and requiring all 3 on the camera trigger simultaneously before an event is fired. They still trigger on bulk light changes, reflection from car headlamps, dew on the grass and a bit of breeze.. you get the picture.

 

[Chuck Claunch]

Cool, good to know.

 

[nayr]

Ive got one camera that records on built in motion, its indoors looking at a catfood feeder and a cat-door.. tuned reliably enough it records my pet's comings and goings and over half of a day's given events wont be anything other than subtle lighting changes because of transparent cat door.

outdoors I just record 24/7/365 and use the built in video analytics to flag potential events on the timeline, so I dont have to watch hours of video on high speed to figure out when an event occurred.. and use real security sensors for actual alarms/alerts

nothing onboard can compete w/BlueIris's analytics and ability to tune..