Dahua IPC-HFW2449S-S-IL Dahua Network Camera Web 5.0 Operation Manual V1.0.7

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Figure 6-32 Audio

Step 2 Click next to Enable in Main Stream or Sub Stream.

For the camera with multiple channels, select the channel number.

Please carefully activate the audio acquisition function according to the actual

requirements of the application scenario.

Step 3 Congure audio parameters.

Table 6-11 Description of audio parameters

Parameter Description

Compression

You can select audio Encode Mode from PCM, G.711A, G.711Mu, G.

726, AAC, G.723.

The congured audio encode mode applies to both audio and

intercom. The default value is recommended.

Sampling Frequency

Sampling number per second. The higher the sampling frequency is, the

more the sample in a second will be, and the more accuracy the

restored signal will be. You can select audio Sampling Frequency from

8000, 16000, 32000, 48000, 64000.

Audio Input Type

You can select audio input type from:

●

LineIn : Requires external audio device.

●

Mic : Not require external audio device.

Noise Filter Enable this function, and the system auto lters ambient noise.

Microphone Volume Adjusts microphone volume.

Speaker Volume Adjusts speaker volume.

Step 4 Click Apply.

Operation Manual

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Dahua IPC-HFW2449S-S-IL 4MP Smart Dual Light Fixed-focal Bullet WizSense Network Camera