noise

Hi, I have a 2mp Dahua PTZ, that has been brilliant since 2019. However, recently, the past 2 or so months I have noticed a strange constant pixelation / noise at the bottom of the screen. It is there constantly. Whether there is movement in the scene or a still scene, change of light, shadows...

OK, I'm curious what others are using for Exposure settings. I am big on freeze frame capability when playing back footage so I always go manual with Shutter speed. Over the years I have found that anything above 4-5ms shutter speed is a no for me. Gain I like to keep low for reduced noise if...

Hello all, A little while ago I noticed my cameras were capturing garbled audio both in Liveview and Playback (Dahua DH-IPC-HDW4831EMP-ASE ). The distortion made people sound satanic and illegible. I had a play around with settings this evening and found the cause. The relevant setting is in...

camera works fine for 10-15s, then has 2-3s of noise. Not always, but most often like this. dahua 4631c turret I'm pretty sure it did this before I installed it, so I think it is the camera.... it is also from ebay, chinese I think. But I also had to run my cat5e in the vicinity of AC power...

The speaker on my DS-2CD2425FWD-IW camera produces a screeching noise when I turn on the microphone symbol on the iVMS-4500 app on the iPad (to try to speak through the camera). The noise occurs whether the camera microphone is set to on or off on iVMS-4500 (i.e., speaker symbol on iVMS-4500 set...

I own a Hikvision DS-2DE4225IW-DE PTZ camera. I decided to connect an external microphone to it and noticed electric noise/humming coming through it. At first I thought that it was my faulty wiring of the microphone. However, I've also noticed that there is no noise during the booting process...

Hi all, I have just received an unbranded Dahua NVR5216-4KS2 courtesy of Andy. It's a well made, solid looking unit and a great spec. Unfortunately it is also very loud, infact it is much loader than my HTPC, TV and Humax box all combined. This is currently unacceptable to both me and my wife...

Hello I have reolink 423 PTZ camera. I got this mic for it with this POE splitter. Im using Blue Iris software. When I turned on the audio with the gain set the lowest at 50% I hear what I describe as a bad snr where the noise is louder than the sound it should be picking up. I also head...

I have a Dahua NVR but I'm sure this would work with anything. Noctua 5v fan (runs at about 15db at 100%) Noctua A-Series Cooling Fan Blades with AAO Frame, SSO2 Bearing (NF-A4X10-FLX 5V) https://www.amazon.com/gp/product/B00NEMGCIA/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 3-pin reducer...

Need some help with an RFI problem. I have 6 Amcrest ProHD Outdoor 1080P POE Security Bullet Cameras on my property. It doesn't matter if I power them directly with a 12v PSU or via PoE, the camera itself lets out a whole lot of RF noise. It is slightly worse when powered via PoE but even...

I have some Hikvision cams installed on a site where I use the audio output for the offsite monitoring company to communicate with intruders. Was working perfect for a few months. Getting some noise from one of the speakers the last few days. When I switch the cam from video/audio to video and...

I finally have 3 cams up and running... I cannot figure our why there is so much "noise" or why they are so grainy at night... I tested both inside and they do not have the grainy look. Its driving me crazy because I am not looking forward to running new cable if that it the problem. These...

I have several cameras consisting of 2-4 each of the following DCS-930, 923, 942 and Foscam 9821w V2 When I click to listen to audio on any of them, there is a lot of background noise which sounds like audio being processed at the wrong bitrate (or depth). I have done some development with...