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rak313

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Posts posted by rak313

  1. Posted

     

    On 1/30/2019 at 5:47 AM, tomcctv said:

     

    there are many camera that do NTP 

    but in the ops case 

     

    having ip cameras stream to a recorder it is common practice to switch off camera time .... and the most important time is what the recording device is using and displaying of footage

    The ip camera has an option to sync the time to an NTP server. Its just not using NTP software on the camera, and so the camera time drifts a bit in between updates. So i want to add ntp software to the OS on the camera, so that the time will be in better sync than about 1 second off.

    Since the internal camera OS is linux, it should be easy to add ntp.  So im wondering if anyone has done it.

     

  2. Posted

    I have several hikvision cameras that i use with their free iVMS 4200 v3 software for recording video.  I set them to the same ntp server for time sync, but notice about a 1 sec variation in the camera clocks.  I assume this is because the cameras don't actually run ntp, and instead just periodically set their clocks to the ntp server’s time.  I find this a bit annoying, and was wondering if anyone has successfully loaded ntp onto the cameras, so that they are synced much closer together.

    Thanks

  3. Posted

    I have 5 Hikvision cameras. They are set to sync time from a GPS trained NTP server. But the time of each camera apears to be +/- 1 second instead of 1 or 2 milliseconds that is typical of NTP systems.

     

    I assume this is due to the Hikvision's not using NTP on the camera's Linux to condition the camera's clock, but instead just use the NTP protocol to reset the clock. So as a result, the time is always around 1 second error.

     

    So my question is, can NTP software be placed on the camera and run on startup, such that the camera's clock gets conditioned by an external NTP server? And if so, how do you do it?

     

    Thanks in advance.

     

    Rick

  4. Posted

    OK i now have an ipad with ivms-4500, and I'm trying to connect to my pc running ivms-4200. This is all within my local network, not via internet. On the ipad ivms-4500 devices screen, I set up Reg Mode: IP/domain, Address:192.168.0.196 (ip address of my pc running ivms-4200), port:8000, User name: admin, pasword mypassword of ivms-4200, camera no: 1

     

    I get back "connection failed" error.

     

    If I use a browser on the ipad to 192.168.0.196, I get the login page of the ivms-4200, so I have connectivity. And I can login (but not see cameras - because i needs a plugin).

     

    Help appreciated.

     

    UPDATE:

     

    I was logging into a remote client that was not where the storage was taking place. So now here is the situation:

     

    I have ivms-4200 v2 storage server running on a window 7 pc. I have 5 hikvision cameras recording all the time. On this same server, i have ivms-4200 client software running. I set up my ipad with ivms-4500.

     

    I configured ivms-4500 (on the ipad) to the ip address of the pc where the storage server is running, port 8000. In live view on the ipad, all 5 cameras show error 73. However, if I select remote playback, i can see the recorded material on the ipad.

  5. Posted

    OK i now have an ipad with ivms-4500, and I'm trying to connect to my pc running ivms-4200. This is all within my local network, not via internet. On the ipad ivms-4500 devices screen, I set up Reg Mode: IP/domain, Address:192.168.0.196 (ip address of my pc running ivms-4200), port:8000, User name: admin, pasword mypassword of ivms-4200, camera no: 1

     

    I get back "connection failed" error.

     

    If I use a browser on the ipad to 192.168.0.196, I get the login page of the ivms-4200, so I have connectivity. And I can login (but not see cameras - because i needs a plugin).

     

    Help appreciated.

  6. Posted

    ...

     

    By the way, your network config sucks. Two subnets? And a computer connected to two wifi networks? Really?

     

     

    Thanks for the information and your opinion . My opinion is it doesn't suck. It was done that way on purpose.

     

    The wireless traffic from the cameras on the 192.168.1.1 wirelesss network is 20-40 Mbps, and I plan on adding more cameras. I put it on a 5 GHz channel, that can support 100 Mbps thruput. I use 5 GHz because few are on those channels and the signal doesn't travel very far.

     

    I want none of that traffic on my regular 2.4 GHz home wifi network. Thus the 2 networks. The only reason the playback PC was connected to the main network was to get time. But that connection will now also allow a tablet running ivms-4500 to connect to the ivms-4200 client.

  7. Posted

    I currently have 5 Hikvision IP cameras connected via POE switch to a wireless router (that is not connected to the internet), and recording to a dedicated remote PC.

     

    This PC runs Hikvision’s iVMS-4200 storage server. The PC is direct wired to the router. All cameras, the router, and the PC have IP addresses of 192.168.1.x, netmask 255.255.255.0.

     

    The recording PC has a wireless connection to my main wireless router, which is connected to the internet via 192.168.0.x,netmask 255.255.255.0. It uses this connection to get NTP time.

     

    I have another dedicated PC for viewing live and recorded video that runs Hikvision’s iVMS-4200 client software. The connection from the playpack PC to the recording PC is wireless via the 192.168.1.1 wireless router. The playback PC has a second wireless card that connects it to the main wireless router (192.168.0.1) providing an internet connection.

     

    I want use an ipad (or Android tablet) with Hikvision’s iVMS-4500 to be able to view the cameras live. But I am unsure how this works. Does the Hikvision’s iVMS-4500 connect directly to the cameras or to the Hikvision’s iVMS-4200 client?

     

    The reason this matters is I want to connect the ipad to the 192.168.0.1 network for internet access. This network can see the playback PC but not the cameras directly.

     

    So the question is does the IVMS-4500 connect to the ivms-4200 client, or the cameras directly?

     

    Thanks in advance.

    Rick

  8. Posted

    Hikvision iVMS v2 seems like a better interface but I am given up trying to get the PCNVR feature working in it.

     

    Instead I have gone to iVMS PCNVR v1.3 and got that working today...

     

    If anyone got Hikvision iVMS 4200 v2 working as a PCNVR - would love to see how you set it up. Thanks!

     

    I have iVMS 4200 v3 working. I set it up about 2 months ago and I may not remember everything. But my setup is as follows:

     

    I use 2 computers, one for recording and one for viewing. This is not necessary - I only do that because the recording pc is located remotely and the viewing pc is connected via wireless.

     

    On the recording PC I installed the storage server software of the iVMS 4200. On the viewing pc I installed the client software of the iVMS-4200. For configuration, on the client PC, I added the cameras, added the remote storage server, and setup a recoding schedule.

     

    On the recording PC the storage application (NvrStorageServer) is run (it does not have any user interface - it is controlled via the client). On the viewing pc, the iVMS-4200 client is run - and used to set up everything and view live cameras as well as playback video.

     

    I like the software very much.

     

    I followed an instruction I found on the web - but I can't remember where I found it. Note: all of the software was located within the iVMS-4200 v2.

  9. Posted

    I've noticed an anomaly with the 6mm ds-2cd2032-i that has more blue in the image than say the 4mm or 12mm lenses. Almost like the affect you get from a broken IR filter but nowhere near as strong, so it's not that. Could be a lens design issue or the IR filter color used in the 6mm is different, but I would think they use the same IR filter with the different lenses, or not.

     

    Anyone have the same experience with this lens?

    I have 2 USA version 6mm ds-2cd2332-i cameras and one 4mm ds-2cd2332-i. The 2 6mm cameras have 5.1.2 firmware. Comparing the 2 6mm cameras to each other (both with the same out of box settings) - one I would describe as perfect color balance, the other one has a slight blueish cast and slightly different brightness. After adjusting for brightness, there is still a slight blue cast. Adjusting the hue can minimize noticing it, but not completely eliminate it.

     

    The 4 mm version seems to have good color balance.

     

    Rick

  10. Posted

    ...

    (Note: In the iVMS-4200 storage server software, I left the System -> Time -> NTP box -> unchecked).

    ....

    SOLVED

     

    It turns out the "NTP sync to time.windows.com" checkbox on the storage server WAS checked.

     

    I was controlling this via the client menu, and on the server page, but had a camera highlighted instead of the storage server. So I accidentally was disabling NTP on the camera, but not on the storage server. So periodically the storage server was resetting the system time bothering the NTP software I installed in windows.

     

    Once I unchecked this box, NTP converges quickly.

  11. Posted

    I have been using iVMS-4200 software for a bit over a week. I have 2 Hikvision cameras (2332, 2032) connected to a Netgear 8 port (4 are POE) switch which then goes to a 4 port wireless router (Linksys EA2700) that is connected to the PC. I run iVMS-4200 (storage server) software on this PC. This PC is at a remote location.

     

    On another PC, I run the iVMS-4200 client - connecting to the camera and the remote storage server. This connection is wireless (with good signal strength and high connection speed). Both PCs run windows 7 professional.

     

    I want the cameras and the 2 PCs to have accurate time. I know there is time correction in windows 7, but it is rudimentary. So I installed (meinberg) http://www.meinbergglobal.com/english/sw/ntp.htm NTP for windows.

     

    On the client PC - everything went well, NTP converged in a few minutes. But on the PC running the iVMS-4200 storage server, NTP never converged - even after 10 hrs. The offset reported was as large as 1.5 seconds. Whereas on the client PC, the offset was in the 10 millisec range. (Both PCs getting time from the same NTP server.)

     

    Then I stopped the storage server, and NTP converged within a few minutes with the time offset in the 10 ms range. Restart the storage server and the NTP time offset goes erratic (300-1300 ms jumping wildly).

     

    (Note: In the iVMS-4200 storage server software, I left the System -> Time -> NTP box -> unchecked).

     

    So I uninstalled NTP, and re-enabled the windows (7 built in) time service. Same behavior: With no iVMS-4200 storage server, time is well behaved (matches the other PC with a slow drift). Run the storage server, and the time gets offset by random amounts. (We are only talking about fractions of a second - getting as high as 1.5 seconds for the hour period I observed it. So there are workarounds - like using ntpdate to set the time periodically, or just living with the error if it stays bounded).

     

    I conclude that the iVMS-4200 storage server is somehow causing the PC system time to become corrupted. This behavior can be observed within 5 min of starting the storage server.

     

    Thoughts?

  13. Posted

    I noticed that when my Hikvision DS-2CD2332I camera was disconnected from my network, I could no longer search for previously recorded video that was stored via hikvision iVMS-4200 server software. Once the camera was reconnected, the search was possible.

     

    This would mean if someone were to break a camera, the previously recorded video from that camera would no longer be viewable from within the iVMS4200 software.

     

    Now the video would still be on the recorded disks, and there are utilities to view this video, but the filenames just inclease in number, and do not convey the camera, so finding the correct file could be difficult.

  14. Posted

    This is from V5.1.2 build_140116 Release Note:

     

    1) Chinese firmware IP camera will not be able to connect to iVMS4200

     

     

    I have two DS-2CD2032-I cams, both Chinese versions with Chinese firmware, purchased from CCTV Camera China. One has V5.1.2 build 140116 and the other has V5.1.6 build 140412 firmware that the vendor applied the hack to give English UI (well, multi-language capability).

     

    I don't normally use IVMS-4200 so I'm not sure what's supposedly broken, but it seems fine to me...

     

    [attachment=0]Capture.JPG[/attachment]

     

    Thank you for the info. CCTV Camera China is where I was considering buying, but I was concerned about it not working with IVMS-4200.

     

    The main view screen you showed is a "live view". Have you been able to record/playback?

     

    My fears have been greatly reduced with the success of the region change fix CBX offers.

  15. Posted

    I have a 4 mm Hikvision ds-2cd2332 camera working with iVMS-4200 software. I'm (more or less) happy with how the software works. The firmware version in the camera is 5.0.2.

     

    I want the 6mm version of this camera, and can't find it from a US vendor. I have contacted a Ailliexpress vendor who says their cameras come with firmware version 5.1.6 "English version" - whatever that means.

     

    I am worried that this "china" region camera with 5.1.6 firmware won't work with ivms-4200, as has been suggested by others in this forum.

     

    1) is this true?

    2) what are my options?

     

    Thanks in advance.

  17. Posted

    I'm confused. Hikvision ivms-4200 PCNVR and Hikvision ivms-4200 Client seem to be quite similar. I don't understand what the difference is or which one I should be using.

     

    The PCNVR seems to be a stand alone application that views live/records/and plays back. The Client seems to do all those things as well. It looks to me like the "client" contains a collection of applications that are more integrated - but I can't tell.

     

    Please enlighten me.

     

    Thanks

     

    Rick

  19. Posted

    I am looking to buy a Hikvision IP camera. I have decided to buy only from US vendors and not gamble on buying direct from china. Tempting, but too many things can go wrong. From minor - sent wrong focal lenght, to bad - camera doesn't work, vendor won't answer your email.

     

    I have searched and can't find any for sure Hikvision USA resellers (I probably wouldn't like the price even if i did). I did find a site in Plano Tx that said Hikvision USA on their website ad, but they didn't respond to my email when I asked if it's really a Hikvision USA camera (red flag).

     

    So now it's down to "good" sites that import "English" versions. The problem is I don't know which ones are reputable.

     

    IMO, signs of being reputable website are:

    1) web site has name, address, and phone number of place of business.

    2) 30 day return policy - if camera is in same condition as it was out of the box - with all items returned.

    3) no more that 15% restocking fee.

    4) good reputation among user community.

     

    So far, I've only found 1 online store that met 1), 2), 3) above and they didn't sell the wireless model I wanted (Hikvision DS-2CD2532F-IWS ).

     

    Assuming this is not breaking this site's policy, I would like anyone who has a recommendation for a good US vendor selling Hikvision to PM me and share your buying experience.

  20. Posted

    Here's my post on how I measure FOV. The gear is inexpensive and easy to use:

    http://www.cam-it.org/index.php?topic=5424.0

     

    The image size issue isn't cropping, as you can't crop a directly sampled 1080p image into a smaller FOV 3MP image; you have to re-sample. On the Hik, either the 1080p or the 3MP image is re-sampled, and I've pulled images that indicate it's the 3MP image, but it's hard to know exactly what's going on at the sensor level.

    Thanks for the link and method of measuring. Do you have any info on the "6mm" lens?

     

    When the 3 MP sensor image is scaled to 1080p, they undoubtedly don't use the same set of pixels as when using the 2048x1536 mode - and this is what must be responsible for the change in field of view (thus me saying different cropping of the sensor). In fact they must be using a larger sensor width (versus 2048x1536 mode) in the 1080p mode to get a larger FOV. (I wouldn't be surprised if both modes were rescaled).

    ...

    The only way to know for sure is to measure them.

    I agree - and the reason for my original post.

    Thanks for sharing your measurements.

    ...Original Post...

    Does anyone know the actual FOV with the DS-2CD2532 (or DS-2CD2032-I) for the various lens choices?

    Thanks

  21. Posted

    I want to mount a Hikvision camera outside with minimal wires and holes in the house. I know the DS-2CD2532F-IWS has wireless capability, but I want to use the more powerful IR of the DS-2CD2232-I5. So I'm looking for a wi-fi adapter that can live outdoors. I haven't been able to find one.

    I found this which I think will work, but it also requires POE for power.

     

    TP-LINK TL-WA5210G High Power Outdoor Wireless Access Point, 2.4GHz 54Mbps, 802.11g/b, 12dBi directional antenna, Passive POE

     

    https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&ved=0CDAQFjAC&url=https%3A%2F%2Fwww.discomp.cz%2Fimg.asp%3Fattid%3D69085&ei=_tilU8GfApSLqAbf2YGIBg&usg=AFQjCNG81yHYKiiJuLRE-YPXAu8EfFgbNw&sig2=spJcziBPi_fySXs6yD1axQ&bvm=bv.69411363,d.b2k&cad=rja

     

    I also found a cisco wifi/power converter for their IP phones, but its not for outside, and i don't know if the power jacks are compatible (size/polarity) with Hikvision IP camera 12V power jack.

     

    http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CB8QFjAA&url=http%3A%2F%2Fwww.cisco.com%2Fc%2Fdam%2Fen%2Fus%2Ftd%2Fdocs%2Fvoice_ip_comm%2Fcsbpva%2Fwbpn%2Fuser%2Fguide%2Fwbpn_user_guide.pdf&ei=zdylU-KkHM-bqAa6h4HQDQ&usg=AFQjCNH23Uy8dldWqDgPpk3z_5G2AfiubQ&sig2=tp1IEdineYJyA7ayuS7a8A&bvm=bv.69411363,d.b2k&cad=rja

  25. Posted

    The actual sensor sizes vary a bit these days, and the image circle of the lens will affect the FOV for a given sensor size. One 4mm lens will have a different image circle size than a different 4mm lens. Many Chinese cam manufacturers don't give accurate FOV data in their specs.

     

    Hik also doesn't specify which resolution this is for (turns out it's 1080p). Most cams, 3MP would give a wider FOV, but on the Hik 2xxx series, they sample the output at 3MP and give a narrower horizontal FOV at 3MP.

     

    I've measured the actual FOV on my 4mm Hiks, and here's what it is:

     

    Hikvision DS-2CD2032-I Resolutions:

    3MP = 2048 x 1536

    1080P = 1920 x 1080

     

    OEM 4.0mm lens - Hik's original lens

    3MP = 69 degrees H

    1080P = 77 degrees H

    Yes, there is no exact size for a 1/3" class sensor, but it will be less than 5 mm - or they would be claiming 1/2.5" sensor.

     

    I believe that the specified FOV and/or lens focal length is not accurate. If you are getting 77 deg FOV with the 4 mm lens, this implies a 6.4 mm wide sensor - which would clearly be a 1/2" class sensor. FOV=2*atan((sensor_width/2)/focal_length). I doubt they would have a 1/2" sensor and not hype it, since it's twice the area of a 1/3" sensor.

     

    Now if it were the 2.8mm focal length, with a 4.4 mm sensor width:

    FOV=2*atan((4.4/2)/2.8 ) = 76.3 deg, which is pretty close to the claimed 75.8 deg FOV.

     

    If you are saying that the image is cropped differently in 1080p vs the full 3 MP, so the FOV is corresponding different in the 2 resolutions - that makes sense.

     

    I don't follow about different 4 mm lenses have different images circles (I certainly believe not all 4mm FL lenses are 4mm FL). Not even sure what you mean, but if 2 lens are both 4mm focal length, then the angle spanned by a given sensor size will be the same for both lenses. Maybe you are saying one lens can't image the entire sensor area. Even if that is true you are going in the wrong direction here. In order to get 76 degree FOV, you either need a much smaller focal length than 4 mm or a much larger sensor width than 4.4 mm.

     

    I'm not doubting your measurements, I'm just trying to figure out whether to get the 4mm or 6mm camera.

     

    Thanks for the data.

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