Dahua NVR21-4KS3 Series User Manual page 203

resolution.
Procedure
Select Main Menu > CAMERA > Encode > Audio/Video.
Step 1
Step 2 Select a channel and then configure parameters.
The parameters for main stream and sub stream are different. Some models support three
streams: main stream, sub stream 1, sub stream 2.
Parameter
Coding Strategy
Type
Compression
Figure 5-71 Audio/video
Table 5-20 Audio/video parameters
Description
● General: Use general coding strategy.
● Smart Codec: Enable the smart codec function. This function can
reduce the video bit stream for non-important recorded video to
maximize the storage space.
● AI Codec: Enable the AI codec function. This function can reduce
the camera code stream, network transmission pressure, and hard
drive storage space without affecting the image quality.
Select the recording type for main stream from General, Motion
(motion detection), or Alarm.
Select the encoding mode.
● H.265: Main profile encoding. This setting is recommended.
● H.264H: High profile encoding. Low bit stream with high definition.
● H.264: Main profile encoding.
● H.264B: Baseline profile encoding. This mode requires higher bit
stream compared with other modes for the same definition.
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User's Manual