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    Larsen effect/feedback/tone on the Line IN input on Hiwatch DS-H216QA(B)

    Hi mates, when I enable the audio I have this annoying tone as result, no matter what I connect on line in, connected, disconnected or grounded. How can I get rid of it? The FW is updated V4.70.143 build 230418 It looks like the two way cannel is always enabled and there is an hardware impedence...
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    Expert needed to reduce/eliminate flickering on DVR

    Well, I wanted to reson moe about but if there are no infos, life goes on, I'm happy to confirm that DCDC insulated solved my problem, the images are perfect (even with log cables), max detail and zero noise, so the h265 keeps the bitrate near to few kb/s when there isn't movement. Before h265...
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    Expert needed to reduce/eliminate flickering on DVR

    Hi mates, yes I know how to solve the problem, it's necessary to separate ground of DVR from the ground of cameras, I've just bough 2 not expensive DC/DC with insulation from Aliexpress, on next days I'll implement them and let you know, but I'm sure that will work. By now I've connected the...
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    Expert needed to reduce/eliminate flickering on DVR

    Thanks for answer. I repaeat, with HDD not recording, no flickering. It's doesn't depend on other things, it depends on HDD writes, I'm 100% sure. You probably always use different power adapters for cameras and DVR, in that case the problem will not appear, but you will have very limited...
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    Expert needed to reduce/eliminate flickering on DVR

    I try to buy these DC-DC modules with ground isolation, it shoudl work. Anyway I can't understand how HDD could create these RF interferences. Maybe it can be up to seagate too, as WD probably generate less impact...
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    Expert needed to reduce/eliminate flickering on DVR

    thank you for answers, I upload here a piece of video. No power suplly problems, if I stop record on HDD the flicker disappears, the image is stable as it should Shortly I can assure you no problem of camera, cable (it's FTP + balanced with baluns on both side) of power supply. For me no way...
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    Hi-Watch firmwares, where find them?

    By the time I've found this, I hope it's useful Архив с ftp.hikvision.ru
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    Expert needed to reduce/eliminate flickering on DVR

    Hi, I've the same issue in many systems I realized, the image suffers of flickering, and it is related to the HDD writes, each time HDD writes a flick appears on all cameras, usually the ones with longer distance have a bit less of that. I am using a 12V 10A PSU with a 17Ah battery connected...
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    Hi-Watch firmwares, where find them?

    Hi, I've 2 DVR with some issues, I would first update the to see if the problem solves, in particular for DS-H216UA(B) и DS-H216QA(B) I thank in advance for your kind answers!
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    Vivotek cameras with OnVif movement detector (not working)

    Hi, thanks for answer, NVR4232 4KLS3, yes it has some advanced functions, I'm afraid it can't pocess many cahnnels with that. I have about 12 Vivotek cameras which I need to setup with detection. Anyway thanks for suggetions, I'll have a look
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    Vivotek cameras with OnVif movement detector (not working)

    Hi, I moved from Vivotek IP system (Vivotek cameras+Vivotek VMS free software) to a Dahua NVR, there is no possible with any Vivotek model to receive OnVif triggers about movements, it looks Vivotek uses a property protocol to work with its VMS only. Do you share this? There is any way to...
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    Hi-Watch naming rule

    Hi, I can't find it, only Hik vision.. In particular I would now differences between DS-I250M(C) and DS-I250L(D), apparently the case and IR vs LED backlight, but I would know exacrly what this M(C) and L(D) mean. Thank you a lot
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    How reduce HDD image disturbs, lines appear on video when HDD write, on Dahua XVR

    This time I've tried to instert an heavy inductance on the +12v of HDD line, with 100nF capacitors on on put and output, and also an 1000uF 16V capacitor on output, let's see. The 12V HDD is directly connected to the DVR 12V jack, that's also weird when the power supply charges a battery to...
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    Does HiWatch/Hikvision support AoC from Dahua's cameras?

    Please help me finding answer, thanks
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    Does HiWatch/Hikvision support AoC from Dahua's cameras?

    Hi, anybody can help here? Have you tested it? Thanks
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    Does HiWatch/Hikvision support AoC from Dahua's cameras?

    Hi, I'm thinking to buy this technology to continue the client history (it has other Hivision's DVR) and I=m wondering to know if it supports the audio microphone coming from a Dahua camera such as HDW1231TLMQ-A-0280B, possible? And which mode this camera should work for that? CVI or TVI? I...
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    How reduce HDD image disturbs, lines appear on video when HDD write, on Dahua XVR

    Your question is proper, no. I'm ground the shield of FTP cable only on the recorder side, on both sides 3 wires are joined for minus, 3 wires for plus, this eventually can result on loop, but I have examples where there are no clicks.. or very light ones, this as I say may vary from XVR...
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    How reduce HDD image disturbs, lines appear on video when HDD write, on Dahua XVR

    Hi, I would discuss with you solutions ro reduce this annoying effect. Since I put the DVR on the same 12V of cameras (and it should be that, since I'm using a big battery 12V to keep system always on) on some cameras (depending on the leght of cable, model, and maybe some other factors) appear...
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    NVR Dahua 4 detect face and open door on VTO

    to produce a short video on DMSS under the messages it's needed to rise an alarm (or video detection), maybe a face recogniction, I have no idea since I've never tested it, and I don't know if DMSS support the subscription on the face recognition. Maybe face recognition event is availabe on the...
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    NVR Dahua 4 detect face and open door on VTO

    To catch call, open door and start manual record there are Dahua API, using Node Red is possibile to receive/trigger them easly, this may help somehow
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    NVR Dahua 4 detect face and open door on VTO

    Thank you for clering it, in my case it's a problem because the client has any skill to proceed himself with adding (and more, do this on both VTO) and the place is far from me, I can't go there every time he needs to add or delete someone, simply no sense. More, during winter time it will be...
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    Which is the camera's stream max resolution a Dahua VTH can support?

    Thanks for precious answer, this looks a bad limitation.. neither h265 they don't support
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    NVR Dahua 4 detect face and open door on VTO

    Thank you for your kind reply, I agree with you that buying a didicated system, which does itself the work, which has a camera disigned for that purpuse, etc, it's alwyas the best choice in terms of reliability. But the cost does also have impact here, installing 2 of those VTOs in a different...
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    NVR Dahua 4 detect face and open door on VTO

    Another important question, to create the white list, people have to register manually at each VTO? There is a way to share database between VTO? Can I do it remotely by web interface, for example sending VTO and image extracted from a video? My client is really hopeless with technology, he...
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    Which is the camera's stream max resolution a Dahua VTH can support?

    Hi, I'm wondering to know it before buy (and get troubles), on pdf it isn't specified the decoding capatibilities a VTH does have when we talk about show other cameras by RTSP, Considering for example VTH2621GW-WP, 2MP? 4MP? 8MP? And what is the max bitrate? More, does it supports H265 too? Or...
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    NVR Dahua 4 detect face and open door on VTO

    thank you mate for you answer, I've checked all these solutions, please let me tell you the installation will be on the street, with sun that hit many hours per day the device, temperatures low to -25, and people who may love vandalism when they see a wide display, so I would keep more on...
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    NVR Dahua 4 detect face and open door on VTO

    Hi, I've 2 working VTO 6100C and I would not change them if possibile, I would like to buy a Dahua NVR (or use DSS) that is able to detect face, put them on white list and open gate automatically when face is recognized, is it possible? Which models can do that? Thank you!
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    Unable to get other RTSP streams from Herospeed XVR - Only Channel 1???

    I've tried it as you suggested but with few hpes, the NVR doesn't support onvif, so this program can't connect to it and guess the rtsp url. I've an error 400 as reply, Bad request. Herospeed isn't at all a good brand, but I hope somebody may know the url, if there is one, probably yes because...
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    Unable to get other RTSP streams from Herospeed XVR - Only Channel 1???

    Thank you for your kind answer, sure I put two of them, I've tried all combinations possible with no results, I've added also admin:password@IPnvr:554 cause sometime it asked for it (I'm using for test VLC), I have a NVR_HI3536X64_H265_64CH_V9.1.13.5, no more ideas? Thanks
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    Unable to get other RTSP streams from Herospeed XVR - Only Channel 1???

    Unfortunately no one of the suggested URL works with a Herospeed 64 NVR :(
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