Dahua N41C1P, User Manual, Page: 66 / 377

User's Manual
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M: Main stream: Its bit streams are big and definition is high. It occupies large network
bandwidth suitable for video wall security, storage and more.
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S: Sub stream: Its definition is low but occupies small network bandwidth. It is suitable for
general security, remote connection and more. Some models support two sub streams (S1,
S2).
5.6.3.7 Picture Search
Background Information
Select the image of target person on the live view page and then search by image for all the
related videos with the target person.
Procedure
Step 1 Click . The live image is frozen.
Step 2 Draw a search range according to the on-screen prompt, and then click OK.
You can adjust the searching area. Make sure that there are less than 30 faces in the
selected range.
Figure 5-18 Draw a searching range
Step 3 Select the target face that you want to search for. You can select maximum 8 target
faces.
Step 4 Click Search. The search results are displayed.