Dahua tribrid HDCVI DVR audio input connections ?

[red-wolf 0]

I am very interested in purchasing a Dahua Tribrid DVR. The ability to reuse some existing analog cameras and try the newer CVI type of cameras and IP cameras to boot.

 

I noticed that there are generally 1 audio input and at the most 4 audio inputs on the Tribrid DVR's.

I need to have audio with video on my system. I looked at the setup for a few models and there is an internal and audio input option for each camera. I can not find a HDCVI camera with built in mic except for PTZ models. If you can port audio inputs to multiple channels that would work but I can not verify if that is possible, eg. audio input 1 connects to channel 1 and 2 audio input 2 connects to channel 3 and 4 and different variations.

 

also can someone give an explanation of "reuse audio in and out " for 2 way comms

 

thanks in advance.

[Securame 0]

One audio channel can only be used with one video channel.

 

There are some HDCVI cameras with integrated audio, and some with audio input. Even if the unit only has 4 RCA inputs, if it is 8 or 16 channels, you would be able to use 8/16 HDCVI cameras with integrated audio (that is, that the audio also goes over the coaxial cable).

[red-wolf 0]

So then:

 

audio input 1 is dedicated to channel 1

audio input 2 is dedicated to channel 2

audio input 3 is dedicated to channel 3

audio input 4 is dedicated to channel 4

 

for someone that has a need to have audio and video for all channels it makes it very hard to find

a product to fullfill those requirements. Geovision was able to give you 16 audio channels on a PCI crd using a 15 pin pig tail adapter.

 

It really would not be a problem if HDCVI cameras were EASILY available with built in microphone.

Perhaps that will change in the near future.

[Securame 0]

If you want more audio channels, you will have to either use many 4 video+4 audio units, or go for the higher range units. You do have units with 16ch audio, like HCVR7816.

[red-wolf 0]

Thank you for that info on the all audio inputs unit 7816 .

It would be more cost effective to purchase a 8 channel unit with 4 audio inputs.

 

that way i could reuse 4 non CVI cameras with audio and 2 IP cameras with built in MIC.

and wait to see if I can find a relatively inexpensive CVI camera that has built in MIC.

 

I find it rather odd that built in mic on CVI cameras are almost impossible to find.

Has anyone seen any CVI with MIC built in ?