Axis P3904-R Mk User Manual page 18

AXIS P3904-R Mk II Network Camera
About video settings
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 > 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 average bitrate, Zipstream reduces the bitrate in 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 encoded with a higher bitrate.
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 > 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.
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