31
There are 5 kinds of optional resolution in main stream menu, 1080P, 720P, D1 (PAL), D1 (NTSC) and
AUTO. And there are 3 kinds of optional resolution in sub stream menu, CIF (PAL), CIF (NTSC) and
AUTO. For higher resolution and better video quality, the video file will be larger. Therefore, the file size
should be taken into consideration during configuration.
In the options of Resolution, AUTO is defined as follows.
Resolution
Main stream
Sub stream
AUTO
The device automatically identifies
the television mode of the camera
and records in this mode at the
corresponding channel.
The device automatically identifies the
television mode PAL/NTSC of the
camera and records in CIF (PAL)/ CIF
(NTSC) mode at the corresponding
channel.
②
Bit rate
There are 8 kinds of optional bit rates in Main stream and Sub stream menu, 4Mbps, 2Mbps, 1Mbps,
512Kbps, 256Kbps, 128Kbps, 64Kbps and AUTO. For higher bit rate and clearer image, the video file
will be larger. Therefore, all factors above should be taken into consideration during configuration.
In the options of Bit rate, AUTO is defined as follows.
Bit rate
Main stream
Sub stream
AUTO
If a 1080P camera is connected, the
bit rate will be 4Mbps. For a 720P
camera, it’ll be 2Mbps. And for a D1
camera, it’ll be 1Mbps.
Whatever cameras are connected, the
bit rate will always be 64Kbps.
③
Frame rate
There are 8 kinds of optional frame rates in Main stream and Sub stream menu: 30fps
（
NTSC
）
, 28fps
（
NTSC
）
, 25fps, 20fps, 15fps, 14fps, 10fps and 5fps. For higher frame rate and smoother picture, the
video file will be larger. (Note: mixed connection of camera with different frame rates is not allowed.)
