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spdrun
ParticipantHere are some examples of framerate (not my site)…
http://www.mistralsolutions.com/hs-downloads/tech-briefs/dec11-article2.html10-15 fps is probably OK outdoors on a camera facing the street. You don’t have to run all cameras at the same framerate, BTW.
It actually depends more on how far the camera is from the road. Go further, you can get away with a lower framerate since a moving object is in the image for a longer time.
Filming out of your window = lower FPS.
Camera on your mailbox post = higher FPS.But running everything at 30 is overkill IMHO.
ParticipantThe reason I did it was to get Linux and high enough performance to support 16 cameras.
Software security implementations for Linux also exist. BTW – lowering frame rate can do a lot for performance if it’s an issue. There’s really no reason to be recording at 30 fps unless you’re dealing with burglars who can move at superhuman speeds.
ParticipantNVRs seem to be very sensitive on which cameras they work with. Even though most cameras adhere to stds such as H.264, there seems to be enough variation in implementation that buying cameras of one brand and a NVR of another may cause you heartburn. I ran into this problem.
Software security recording programs seem to be much less sensitive to camera type. And with general-purpose hardware being pretty cheap, there’s really no good reason not to use a software solution.
ParticipantPeople taking way past midnight strolls.
I get the other things, but walking after midnight is weird now? (!)
ParticipantHonestly, camera is just nice to have and cool at first but how often will you look?
I already have some automation with a mi casa verde controller.
But if a thief wants to break in, they can have my stuff. I don’t have much worst taking. I don’t even have pictures on the wall.I’d agree — don’t have cameras in my apartment. Even if I did catch a face, unless the thief was local and known to the local precinct, how likely would the police be to find him/her?
I do specify and design camera systems for businesses, though.
ParticipantYou can run at least an amp over Ethernet cable. A camera probably uses two twisted pairs out of four. No reason why you can’t cut the wallwart cable and connect the wart at one end of the Ethernet cable with the barrel connector at the camera end. Use one twisted pair in parallel for +, the other for -.
Smart TVs with cameras will have limited use, since they’re generally not in all rooms, nor optimally placed to get a good view of an entire room. Plus, unless they support local recording, I’m not trusting the TV maker’s kloudkrap infrastructure to keep footage of my home private.
ParticipantI have mine outside, I’m not enough of a security expert to trust them inside yet. Don’t want anyone seeing me running around in my underwear doing a Tom Cruise scene from risky business.
Practically, if the system isn’t connected to the Internet and is either using analog cameras over coax, encrypted WiFi, or Ethernet, there’s zero chance of that.
Only connect the system to the ‘net if you’re traveling and want remote access to it — an Ethernet cable is easy to unplug.
ParticipantBy self-hosted, you mean that you don’t want it to upload to the cloud by default like Dropcams, right? Can’t say I blame you — I consider uploading constant footage of where I live or work to the cloud to be a major privacy issue.
Honestly, you can get IP cameras for under $100 a piece if you don’t need pan/tilt ability, and I’d either get a dedicated DVR, or get a reasonably current computer with two 1 TB hard drives (softRAIDed) and install something like ZoneMinder running under Ubuntu. Or, better yet, SecuritySpy on an older Mac Mini!
I’d run over a wired network, ideally with a dedicated switch, not over wireless since you don’t want the cameras to be easily interfered with. Lastly, it would be nice to have the DVR hidden somewhere so that thieves don’t steal it or mess with it to destroy evidence.
If it’s a Mac Mini, it’s small enough to live in an old breaker box mounted in a closet wall that would look like a subsidiary fusebox to the cursory eye.
ParticipantItaly is a really poor example to use — it has a long tradition of bad governance (thus helping to create organized crime to protect ordinary people from the rapacity of the princelings in the 1800s), crime, and poverty. Switzerland is probably a better comparison.
Higher GDP per capita than the US, an economy based heavily on finance, high-value manufacturing, tourism, and innovation. Yet average working hours per annum are about 10% lower than the US figure. The trick is to keep productivity high while increasing free time.
Australia, Denmark, Canada, and Norway also have higher GDP per capita than the US with lower working hours, but I’m discounting them because they’re much more dependent on resource exports than the US.
ParticipantAN: The Mojave Desert is about 50,000 square miles.
Say you need 50 square miles for 1.5 million people. You’d need about 1500 square miles to power the entire state of CA by your calculation, which is 3% of the area of the desert or 1% that of the entire state of California.
Actually, for homes alone, your calculation is a bit off base, since average household size is about 2.5 people, which translates to about 550-560k homes in San Diego. But with industrial use and the metro area, I’ll give you the benefit of the doubt.
You’re also not talking rooftops into account. 40 million people / 2.5 = 16 million homes at say 500 sf of roof area per person. I’m lowballing this to account for people living in multi-story apartment buildings, where the roof area is shared between multiple apartments in a line.
That’s 8 billion sf of roof area for residential alone in the state of California or 286 square miles. Probably double that if you count commercial and industrial spaces.
ParticipantPlus using renewable resources allow us to save carbon fuels for future uses or other applications such as military and aviation.
That too, and petrochemical uses. Actually, petrochemicals even more, since you can run jet turbines on hydrogen made through electrolysis.
ParticipantIt’s not just about cost. Environmental factors matter, and I also think that having the most diverse sources of energy creates the most flexible system. If one resource becomes more scarce or the supply is disrupted for some reason, we’re not as vulnerable.
Also, we’re not running out of sun for the next few billion years, and if/when we do, we won’t have to worry about energy sources 😀
ParticipantWhy are we more likely to hit 18000 than 14000? Market growth has far outstripped the real economy, and margin debt is at all-time highs.
Personally, I hope the gogo days (or at least flatness) continues through next Fed meeting to keep the taper on track, then another 5%-10% leg down.
ParticipantThe scales are all wrong, fortunately. It would mean a fall to the mid to low 13000s, not a wholesale crash. Not that I believe in chart voodoo.
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