Squelchy audio record on Blue Iris with Amcrest Cameras

I

invertedflight

n3wb
Feb 2, 2018
16
1
I have 10 Amcrest IP2M-841 cameras recording with Blue Iris. There is something very wrong with the audio recording as it comes out very squelchy and poor sounding in any recordings and also seems to be delayed slightly.

Is it possible I'm doing something wrong with the recording settings? What should I check for?

Thanks!
 
invertedflight said:
I have 10 Amcrest IP2M-841 cameras recording with Blue Iris. There is something very wrong with the audio recording as it comes out very squelchy and poor sounding in any recordings and also seems to be delayed slightly.

Is it possible I'm doing something wrong with the recording settings? What should I check for?

Thanks!
Click to expand...
Are these cams running wired or wireless ?
 
invertedflight said:
I have 10 Amcrest IP2M-841 cameras recording with Blue Iris. There is something very wrong with the audio recording as it comes out very squelchy and poor sounding in any recordings and also seems to be delayed slightly.

Is it possible I'm doing something wrong with the recording settings? What should I check for?

Thanks!
Click to expand...

Do these cams have an audio noise filter that can be turned off in settings? Try that.
 
Cameras are on wifi. I'll try a wired test and see if that changes anything. Hard to believe audio can't be reliably streamed over wifi...

The noise filter in the Amcrest audio settings is enabled.
 
invertedflight said:
Cameras are on wifi..... Hard to believe audio can't be reliably streamed over wifi...
Click to expand...

It probably can but you don't have a choice, as the simple, low-bandwidth audio IS being transmitted along with the complex, High-bandwidth video.
 
Just following up on this (sorry, got really busy). I checked one of my cameras that is on wired ethernet and the audio is still crap. Sounds like that scene in Apollo 13 when the cold and nearly dead tape player is floating around the spaceship. Loud noises come through clearly but speech is almost completely worthless.
 
invertedflight said:
Just following up on this (sorry, got really busy). I checked one of my cameras that is on wired ethernet and the audio is still crap. Sounds like that scene in Apollo 13 when the cold and nearly dead tape player is floating around the spaceship. Loud noises come through clearly but speech is almost completely worthless.
Click to expand...
check the codecs you are selecting in the camera...what options do they give you? how does it sound via browser?
 
Well I feel silly now because I just spent some time playing with it and turning off the noise filter fixed it. Someone actually suggested that above, but I misread and thought they wanted me to have it on.

The noise filter was totally trashing the audio and I could only see it being useful if you intend to situate yourself immediately in front of the camera and speak at it, like in a video chat. Otherwise, it just ends up wrecking any sound that is more than a few feet from the camera.

There is another audio setting for microphone volume, which is set to 50 by default. I turned that up to 100 because I couldn't see how there would be a downside (more noise?).
 
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The default codec option is AAC at 16k, with other options being G.711A and G.711Mu. I did not experiment with changing these.
 
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