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    Dedicated License Plate Cam project

    Incomplete data in the compressed video bitstream will give you this. The root cause could be anything that corrupts or interrupts the data: LAN network congestion, high CPU load causing receive packets to be dropped, and a bad memory block on some storage media are a few examples.
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    3 teens in west San Jose home breakin (11am Sat. Dec. 9)

    That's probably true. San Jose has over 1 million people. How many full-time burglary detectives would you guess they have? At least as of 2015, the answer was one. San Jose Police Struggling To Solve Home Burglaries With Fewer Detectives ... His burglary team has only one full-time detective...
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    3 teens in west San Jose home breakin (11am Sat. Dec. 9)

    Every time SJPD has actually been interested in my video, they physically came and got it. I'm not a lawyer but what they told me there is a "chain of custody" rule for evidence, that means YouTube, social media etc. doesn't count for anything you may actually use in court. They do have an...
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    3 teens in west San Jose home breakin (11am Sat. Dec. 9)

    That is possible. The Nextdoor poster mentioned the police weren't even interested in coming out to get the video, so I doubt there was any followup work done.
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    watching you watching me

    Good question about GPS corrections, I have no idea what Google does (n addition to terrain shadowing there is also intentional jamming*). There are two different map problems: 1) making a good map with whatever data you can get beforehand, and then 2) using the map with live sensor data to...
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    watching you watching me

    In theory, a self-driving car should be able to work without a detailed map, just like people do. But in practice, I agree it's a lot easier and more practical with a very accurate map, and that is likely what google is up to. The LIDAR is probably for the location of the road curb accurate...
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    3 teens in west San Jose home breakin (11am Sat. Dec. 9)

    This one came from Nextdoor. Don't know what cameras they use, but the compression is too high. Still backgrounds look fine, but even with closeup face shots, movement makes everything blocky.
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    watching you watching me

    Thanks! I should have known it would have its own wikipedia page. Reading the referenced articleon the Streetview LIDAR sensor, looks like they may be preparing data needed for autonomous cars:
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    watching you watching me

    A Google StreetView car just drove by. I presume the cameras are looking out of the blue pod on top, but I'm curious about the white-capped black cylinders tilted downwards in front and back just under the camera pod, any idea what that is? Another type of camera, or maybe lidar scanner?
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    When to really, really not answer the door.

    (Not my video, of course. ) Homeowner catches man with gun ringing her doorbell on video
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    Quality of after-market M12 lenses? Swapping focal lengths...

    I was worried about breaking something with just brute force, so I nibbled away at the glue for a while with needle-nose pliers, then I could unscrew the stock lens more easily.
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    Quality of after-market M12 lenses? Swapping focal lengths...

    Welcome to the strange world of M12 lenses. Despite the fact that no spec or claim on ebay should be trusted, I have generally found that the "x MP" claim actually does rank the lens quality, at least the so-called "5 MP" lenses do give better image quality than 3MP, 2MP, "megapixel" or...
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    Relay box key fob signal theft captured on home video

    I have an extra unused (and unplugged) microwave oven where I keep the keys. The microwave door is easy to open & close with one hand and they are pretty well sealed against RF leakage. The fob for my 2017 Toyota shows a replacement list price over $500 (!) so for that money, you'd think they...
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    huntin' season open on cameras in San Jose?

    Could be that, assuming that there is a logical explanation.
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    huntin' season open on cameras in San Jose?

    They made an arrest; apparently the camera was still operational. I think the camera deserves some kind of hazardous duty award. San Jose: 21-year-old man shot Willow Glen school security cameras, police say
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    huntin' season open on cameras in San Jose?

    Karen Scherrer and her husband Bill saw the man, with a shotgun, taking aim at Booksin Elementary School on Booksin Avenue and Dry Creek Road. "I saw the gunman shooting out the main camera underneath the library. You can see the camera shot out," said Karen. Surveillance cameras shot twice in...
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    10MP Ultra Lowlight Camera possible

    I look forward to hearing of your experience with this camera. With the larger sensor size, I expect depth of field to be correspondingly smaller for any given aperture. So it may not be able to get everything in sharp focus, especially if you want 8MP worth of detail. Unless it has good...
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    HOA Approvals for camera installation

    I'd agree that could well be. Hmm.. on Halloween, I rigged up a skull in the yard on a servomotor and ran the remote control from inside at the window. I controlled it by hand to turn so it would always face the kids as they walked up to the door. Not everyone noticed it, but those who did...
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    HOA Approvals for camera installation

    The HOA is reacting to the "seems creepy" perception. I chose to live in a non-HOA area for reasons like this, but my wife objected to auto-tracking with the same reasoning. It didn't seem like the best idea to me anyway, given the chance to miss important activity. But you can get as good...
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    how to configure IVS (tripwire)?

    You got it! Thank you, that is the piece I was missing. Now the triplines show up in the main live view, showing they are active. "Smart Plan" didn't mean anything to me so I hadn't looked in that menu.
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    how to configure IVS (tripwire)?

    I thought I had this figured out long ago, but maybe I just got it working accidentally. I'm using a Dahua IPC-HFW5231E-Z5 (starlight varifocal bullet, 7-35mm) for now, but all the Dahua models I have use a similar interface. I have a DVR recording 24/7 which is OK but I also want the...
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    Infrared focus shift - explanation

    For what it's worth, the visible/IR focus-shift effect is minimal with wide-angle lenses, due to large depth of field those lenses have. That's why the typical wide-angle camera doesn't show the effect much. However, the IR shift is much more of a problem with a long telephoto or zoom lens such...
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    R/C vehicle to pull CAT5 cable through crawlspace?

    No doubt just crawling under there would be the expedient way, and that's the way I did some previous runs. Yes I did use tyvek suit, gloves, face & dust mask. Not my favorite thing though. Alternative is through the attic, which is cleaner but also requires some adventures getting the cable...
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    R/C vehicle to pull CAT5 cable through crawlspace?

    There are already other cables under there, but they are going to different places. It may be possible to just use a regular fish tape if it could be somehow steered around a corner, but the R/C vehicle idea sounded cool.
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    R/C vehicle to pull CAT5 cable through crawlspace?

    I've got a pretty tight crawlspace under the house, also cluttered with A/C ducts, pipes etc. I can physically get into it but I prefer not to. The floor is dirt but relatively level and smooth. I want to do another run of CAT5 across this space, and there's enough obstructions that it's...
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    Garbage truck takes out my neighbor's car

    Looks like a good argument for cameras, the damage would have been an unsolved mystery otherwise I guess.
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    Dahua choppy playback: possible reasons

    I suspect there is a firmware issue on that model with some bitrate & codec settings, or maybe some interaction with internal motion event detection while also streaming, but I am not sure. I have since given up on SD card recording completely, and just stream H.264 to a remote Linux box...
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    Catches guys on foot & car shooting out neighbors windows

    "...went outside and watched them shoot out all the windows ..." well that sounds scary- I'm glad the shooter (presumably) did not notice you standing there! Nice job with the plate capture. In my area crimes are often done with stolen vehicles, but it's something to go on anyway.
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    theft from car avoids setting off alarm

    I hear you about the false alarms, that happens sometimes on my street but I'll still glance out if I'm near a window. The one time it wasn't a false alarm, my video showed the guy wearing a mask checking doors at 3am did immediately stop, hop on his skateboard and scoot off, even though no...
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    theft from car avoids setting off alarm

    Somewhat off topic of IP cameras but maybe someone here has an idea: I heard on Nextdoor that many cars, perhaps as many as nine parked at a restaurant were all broken into last night, all within 1 hour. Each had a broken window. They apparently took laptops from each car that were not...
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