User manual
VIVOTEK
192 - User's Manual
"capability_audio_extmic" is equal to 1). 
mute  0, 1  1/4  0: Mute off 
1: Mute on 
gain 
<Not recommended to use 
this>
0~100  4/4  Gain of input. 
(audioin_c<0~(n-1)>_source = linein) 
* Reserved for compatibility, and suggest don't 
use this since the version number 
(httpversion) is equal or greater than 0301a. 
* We replace "gain" with "volume_internal" 
and "volume_external". More details, please 
refer the parameter description of 
"volume_internal" and "volume_external". 
boostmic 
<Not recommended to use 
this>
0~100  4/4  Enable microphone boost. 
Gain of input. 
(audioin_c<0~(n-1)>_source = micin) 
* Reserved for compatibility, and suggest don't 
use this since the version number 
(httpversion) is equal or greater than 0301a. 
* We replace "boostmic" with 
"volume_internal" and "volume_external". 
More details, please refer the parameter 
description of "volume_internal" and 
"volume_external". 
s0_codectype  aac4, gamr, g711, 
g726 
(Available codec are 
listed in 
"capability_audioin_
codec") 
4/4  Set audio codec type for input. 
aac4: Advanced Audio Coding (AAC) 
gamr: Adaptive Multi-Rate (AMR)   
g711: G.711 
g726: G.726 
s0_aac4_bitrate  16000, 
32000, 
48000, 
64000, 
96000, 
128000 
4/4  Set AAC4 bitrate in bps. 
* Only available if AAC is supported. 
s0_gamr_bitrate 4750, 
5150, 
4/4  AMR encoded bitrate in bps. 










