AXIS P1425-LE Mk II Network Camera
Video
Axis’ Zipstream Technology for H.264 conforms to the H.264 standard and is compatible with third-party clients and VMS solutions
that decode H.264 video.
Recommended use of bitrate reduction
Zipstream offers a number of bitrate reduction presets, from Low to Extreme.
Low
bitrate reduction is enabled by default and is
safe to use in all applications while still reducing the bitrate.
For cloud-connected cameras or cameras using edge storage that need to limit the bitrate for increased storage time it is
recommended to select the
Extreme
bitrate reduction. This setting is suitable to combine with motion detection triggering and
variable bitrate (VBR) where the bitrate is allowed to adapt to changes in complexity in the scene.
How to save bandwidth and storage using Zipstream
The bitrate controller built into the product can be combined with Zipstream to ensure a maximum bitrate (MBR) limit. We
recommend using VBR or MBR with a high bitrate limit to enable the full potential of Zipstream. For instance in railway surveillance
where at times there is a lot of movement in the scene and where it is important to capture details, such as facial features, the MBR
should be set to 10Mbit/s (for 1080p resolution at 30 fps).
To further save bandwidth go to
Setup
>
Video & Audio
>
Video Stream
and do one or more of the following:
•
Go to the
Image
tab and set a low
Maximum frame rate
value.
•
Go to the
H.264
tab and set a high
GOP length
value.
•
Go to the
Zipstream
tab and select
Extreme
H.264 bitrate reduction.
•
Go to the
Zipstream
tab. Enable
Dynamic GOP
and set a high
Max dynamic GOP length
value.
•
Go to the
Zipstream
tab and enable
Dynamic FPS
.
Always verify that the video stream meets the quality requirements for your surveillance purposes after changing the video stream
settings.
MJPEG
Sometimes the image size is large due to low light or complex scenery. Adjusting the maximum frame size helps to control the
bandwidth and storage used by the Motion JPEG video stream in these situations. Setting the frame size to the
Default
setting
provides consistently good image quality at the expense of increased bandwidth and storage usage in low light. Limiting the frame
size optimizes bandwidth and storage usage, but may give poor image quality. To prevent increased bandwidth and storage usage,
the maximum frame size should be set to an optimal value.
Stream Profiles
A stream profile is a set of predefined stream settings including resolution, compression, frame rate and overlay settings. Stream
profiles can be used:
•
When setting up recording using action rules. See
•
When setting up continuous recording. See
Continuous Recording on page 46
•
In the Live View page – select the stream profile from the
Stream profile
drop-down list.
For quick setup, use one of the predefined stream profiles. Each predefined profile has a descriptive name, indicating its purpose. If
required, the predefined stream profiles can be modified and new customized stream profiles can be created.
To create a new profile or modify an existing profile, go to
Setup > Video
>
Stream Profiles
.
To select a default stream profile for the Live View page, go to
Setup > Live View Config
.
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