DS-2CD2D21G0/M-D/NF User Manual
UM DS-2CD2D21G0/M-D/NF 020319NA
77
3.
You can customize the following parameters for the selected stream type.
•
Video Type:
Select the stream type to video stream, or video & audio composite stream. The audio signal will be
recorded only when the Video Type is Video & Audio.
•
Resolution
: Select the resolution of the video output.
•
Bitrate Type:
Select the bitrate type to
Constant
or
Variable
.
•
Video Quality:
When bitrate type is selected as
Variable
, six levels of video quality are selectable.
•
Frame Rate:
Set the frame rate. The frame rate is to describe the frequency at which the video stream is updated
and is measured in frames per second (fps). A higher frame rate is advantageous when there is movement in the
video stream, as it maintains image quality throughout.
•
Max. Bitrate:
Set the maximum bitrate from 32 to 16384 Kbps. A higher value corresponds to higher video quality,
but more bandwidth is required.
NOTE:
The maximum limit of the max. bitrate value varies by camera platform. For certain cameras, the
maximum limit is 8192 Kbps or 12288 Kbps.
•
Video Encoding:
The camera supports multiple video encodings types such as H.264, H.265, MJPEG, and
MPEG4. Supported encoding type for different stream types may differ. H.265 is a new encoding technology.
Compared to H.264, it reduces the transmission bitrate under the same resolution, frame rate, and image quality.
NOTE:
Selectable video encoding types may vary by camera model.
•
H.264+ and H.265+:
You need to reboot the camera if you want to turn on or turn off the H.264+/H.265+. If you
switch from H.264+ to H.265+ directly, and vice versa, a reboot is not required by the system.
-
H.264+:
If you set the main stream as the stream type, and H.264 as the video encoding, you can see H.264+
available. H.264+ is an improved compression coding technology based on H.264. By enabling H.264+, users
can estimate the HDD consumption by its maximum average bitrate. Compared to H.264, H.264+ reduces
storage by up to 50 percent with the same maximum bitrate in most scenes.
-
H.265+:
If you set the main stream as the stream type, and H.265 as the video encoding, you can see H.265+
available. H.265+ is an improved compression coding technology based on H.265. By enabling H.265+, users
can estimate the HDD consumption by its maximum average bitrate. Compared to H.265, H.265+ reduces
storage by up to 50 percent with the same maximum bitrate in most scenes.
NOTES:
»
Upgrade your video player to the latest version if live view or playback does not work properly due to
compatibility.
»
With H.264+/H.265+ enabled, the parameters such as profile, I frame interval, video quality, and SVC are
greyed out.
»
With H.264+/H.265+ enabled, some functions are not supported. For those functions, corresponding interfaces
will be hidden.
»
H.264+/H.265+ can spontaneously adjust the bitrate distribution according the requirements of the actual scene
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