Qvis IPTZ-P400-10X User Manual page 30

After modifying the related parameter you need to click 'Save' to save
settings.
See picture 2.2.5-18 for the Audio configuration interface, audio
configuration parameters shown in picture 2.2.5-19
Note: after modifying audio encoding, please reboot the device.
Picture 2.2.6-18 Audio setting
Picture 2.2.6-19 audio parameter instruction
 Audio/Video → ROI
The video stream concentration makes the video camera's video
preview image clearer. Use the sliders to adjust the 'Region Number'
and 'ROI Level'.
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