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akv

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Posts posted by akv

  5. Posted

    yes, but i wanted to switch to 960h dvr and it looks like it's not real 960h because it's the same corners, same photo, just stretched.

     

    And what did you actually expect? You do have more resolution. WHere you have 704x576, now you have 960x576.

     

    Did you think that changing the DVR would make your camera see wider? The DVR just turns the analog video signal it receives from the camera into 0s and 1s. You do have more resolution now, so you have more detail. But changing the DVR won't change the angle the camera is seeing.

     

     

    i thought the D1 dvr using part of the sensor of 960h camera, sometimes this exist for example dahua 3mp ip camera using the whole sensor only when using the maximum resolution. i know more cases when cameras cropping part of the image, sometimes in order to remain the aspect ratio(using 4:3 sensor to shoot 16:9 1080P video) or sometimes it's a hardware limitation.

     

    why should it not be wider?

    960x576 IS WIDER than 704x576. the common sense tell you that if you get a 960x576 native resolution camera, you should get 960x576 dvr. now, you might say that i had before d1 dvr, so it probably made the picture looks "narrower" than real ("make people taller"), but this is the opposite case. the D1 dvr looks natural, real aspect ratio, native, and the 960h dvr looks stretched to wider, even the 960h dvr is matched to the camera resolution and the d1 dvr is not.

    there are no extra details using the 960h dvr.

    how can it be that 704x576 capture the exact field of view like 960x576?

    they are different aspect ratio.

    if sony claim their sensor and chipset is 960x576 NATIVE PIXELS, and when you use 960x576 dvr it looks too wide, stretched, and not showing any additional details, the conclusion is that sony are lying about the true pixels, they are not 960x576 pixels, they are something else and has been stretched

    now, where is the "extra details"?

    those 2 pictures took from the same dvr, one at d1, other on 960h mode. d1 even looks a little more detailed and the natural not stretched:

    http://i.cubeupload.com/IDnf0K.png

    http://i.cubeupload.com/nWgGXk.png

     

    look also in this review on the 960H field of fiew part

    http://ipvm.com/report/hd_analog_shootout

  7. Posted

    hello

    i got today a 960h dvr that's looks like a fake to me

    what is fake?

    this is photo that was taken from an older d1 dvr

    http://i.cubeupload.com/WOMAtF.jpg

    this photo was taken from the new 960h dvr

    http://i.cubeupload.com/ETihhx.jpg

     

    as you can see, this is EXACT same photo, SAME CORNERS, just stretched

     

     

    now, there are two options:

    1. the D1 dvr was compressed the 960h sensor into d1 resolution

    2. the 960h dvr was taken a d1 and stretched it into 960h resolution

    to me, the d1 photo looks more natural and the 960h looks too wide like it was stretched and it's a fake 960h dvr.

    what do you think?

    any way to test this?

     

    here is a comparison

    http://i.cubeupload.com/qHBK1W.png

  9. Posted

    hi

    i need to get a camera, will be on the street outside my house. it's analog ccd camera.

    the light at night is not that good. i have option to upgrade the lens from f2.0 to f1.2, a little more expensive.

    my concerns are:

    1. how is the sharpness of the f1.2 (it's china lens, not brand)

    2. i live in country with lots of sun. i concern that it will be overexposure at day light

    what do you think?

     

    thanks

  14. Posted

    what software will you be using?

    the one that will comes with the dvr card, im hoping

    i'm looking for inexpensive card, that will do the job. not more than 3 cameras i need to plug to the pc that's running windows 7

    do you think this is good enough?

    http://www.ebay.com/itm/PCI-DVR-4-CH-Channel-Security-Camera-Video-Capture-Card-NAL-NISC-/171414761503?pt=US_Surveillance_Digital_Video_Recorders_Cards&hash=item27e91db01f

    more expensive one

    http://www.ebay.com/itm/1-pc-x-EDS-Dvr-card-4-ch-support-win7-64-bit-phone-surveillance-100-120-FPS-/151369026951?pt=US_Surveillance_Digital_Video_Recorders_Cards&hash=item233e4c0d87

    i also prefer it will have option to connect remotly (android, pc) using ip and port

    thank you

  16. Posted

    hi

    i'm looking to combine my pc system that's running dahua ip cameras, with analog cheap cameras. it is important to have decent low light view. my dahua has minimum illumination of 0.01 lux color, and 0.005 lux of b&w. i found those cameras that claim to have 0.001

    http://www.aliexpress.com/item/700TVL-SONY-COLOR-CCD-48IR-3-6mm-Lens-wide-angle-CCTV-Dome-Camera-for-960H/1518278883.html

     

    i would like to know what you think about this cameras, and if you have better reccomendation

    and do you think this is real 0.001 lux?

    thanks

  19. Posted

    Great.

    Well the LPR is not an issue, actually its really simple, if you have a 12MM Camera with at least a 3MP Lens on it, you should be able to pick up tags, i even use the cheap HikVision small bullet to pick up tags at some customer locations but if that Dahua is at least 12mm or even 9mm and depending on the location of the camera and height of the camera you can achieve the LPR, not pitch perfect but will get you what you need

    yes, even not 12mm. i have 6mm with 3mp camera and it is way enough on daylight to pick up the numbers. i just wanted a software that can analyze the videos and to show me list of car plates, not viewing all the MD recording

  20. Posted

    i have problem with the smart pss. can't allocate it. when i doing allocation, it do allocate but there is no space for recording. this is what i get:

    256156_1.jpg

    i already tried to format, replaced this hdd with new same hdd, reinstalling the windows 7. nothing worked. a week ago it did worked untill i uninstalled the smart pss and reinstalled it. i also tried 2 other hdd, the 500gb main drive and 640gb wd drive. both worked good on that pc.

    anyone knows how to solve this?

  21. Posted

    1. I would go with POE because now most NVRs or POE switches have smart POE capability to send the camera the amount of power it needs at the given moment where as direct power has a constant stream of power with not adjustments to it. Also it would not be the POE that you would need to worry about, its the camera. As long as it is IP66 rating and also has a built in blower than that would be all you need to worry about. If you just get any camera without a blower, your just wasting money because you will have to replace it soon. i recommend you getting a HIKVISION Pro Series camera.

     

    2. It is not the software that detects the licenses plate, its the camera, if you need an LPR Camera or you can actually tweak up almost any IP camera to work but you need to realize that at night time you will be ONLY picking up Licenses plates and nothing else, everything will be black except for when a car passes by in a particular area so you can catch the licenses plate, thats why they call it "Licenses Plate Recognition Camera"

    thank you very much

    i ordered the tp-link poe switch. i already have 3 dahua ipc-hfw4300s.

    as for the car license, i give up on that. i found some compenies that do that but it's probably very expensive

  22. Posted

    hello

    1. do POE might cause overheating or any other problems that power supply don't?

    we live in hot country with direct sun on the cameras. i was read on amazon review that report problem with poe system. it's important that the system will be stable as the power supply is right now, we just don't have protection from rain so want to switch to poe.

     

    2. do you know any non expensive software that can analyze the video to detect car plates?

  24. Posted · Edited by Guest

    Dahua got new mini nvrs, 4ch/8ch some models with poe and with internal sata hdd. would like to know if anyone found where to buy this, expecially the NVR104/108 and NVR104/108-P models?

    and what is the difference between the black and white ones? i only found that the white got audio support and "smart 1u" (don't know what it means)

    the first 4 nvrs:

    http://www.dahuasecurity.com/products_category/nvr-100.html

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