Axis DV426 Instruction Manual page 37

The main stream is used for video storage. The sub stream is used for video backup
and network transmission.
① R esolution
There are 5 levels of resolution in main stream menu for option,1080P, 720P, D1
(PAL), D1 (NTSC),AUTO. And 3 kinds of optional resolution in Sub stream menu, CIF
(PAL), CIF (NTSC),AUTO. The higher the resolution & the better the video quality is,
the larger the video file will be. Therefore, the file size should be taken into account
during configuration.
In the Resolution options, AUTO is defined as follows:
Resolution
Main stream Sub stream
DVR automatically gets the television DVR automatically gets the PAL/NTSC
mode of the camera, and records in television mode of the camera, and
AUTO
this mode at the corresponding records in CIF(PAL)/CIF(NTSC) mode at
channel the corresponding channel
② Bit rate
There are 8 levels of bit rates in Main stream and Sub stream menu for selection,
4Mbps, 2Mbps, 1Mbps, 512Kbps, 256Kbps, 128Kbps, 64Kbps, AUTO. The higher
the bit rate and the clearer the image is, the larger the video file will be. Therefore, all
factors should be considered comprehensively.
In the Bit rate options, AUTO is defined as follows
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