Axis Q3505-SVE Wartung Und Service Seite 20

AXIS Q3505-SVE Mk II Fixed Dome Network Camera
Video and Audio
stream. Consequently, the frame rate might need to go down and the image quality might decrease. To partly compensate for this,
you can select which variable shall be prioritized. Not setting a priority means that frame rate and image quality are equally affected.
How to set an H.264 profile
1. To change the settings for all H.264 streams that do not use a stream profile, go to Video & Audio > Video Stream > H.264.
2. To increase or decrease the number of frames per GOP, set the GOP length.
3. Select one of the H.264 profiles.
4. Select one of the following:
- Variable bit rate
- Maximum bit rate
5. If you select Maximum bit rate, select which variable to prioritize in the Priority drop-down list.
6. Click Save.
How to include current bitrate in a text overlay
1. Go to Video & Audio > Video Stream > Overlay Settings.
2. In the Include text field enter #b.
3. Click Save.
About Zipstream
Axis' Zipstream Technology is a bitrate reduction technology optimized for video surveillance. Zipstream reduces the average bitrate
in the H.264 stream by removing unnecessary data, which makes it possible to stream higher resolutions, reduce storage cost
or keep recordings for a longer time.
To reduce the bitrate, Zipstream reduces the number of bits in the areas of the image that are less interesting from a video
surveillance perspective, for example the background. Image details that are important for forensic video analysis, for example faces
and license plates, are preserved with enough number of bits.
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.
We recommend using the Extreme bitrate reduction to maximize storage time for cloud-connected cameras or cameras using edge
storage. 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.
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