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by default. The record includes audio and video if you highlight audio button here.
For extra stream, you need to check video first and then select audio.
Audio format: Select audio format from the dropdown list. Different series products
support different audio format.
Step 3 Click Save button.
Figure 4-45
4.3.1.2.2 Overlay
It is to set channel title, time title, plate title, and GPS title overlay position.
Step 1 From Main menu->Setting->Camera->Encode, click Overlay button,
Figure 4-46