Stream Profiles; H.264; Mjpeg - Axis P5514-E User Manual

AXIS P5514-E PTZ Network Camera
Set Up the Product
The H.264 stream settings can be configured from the Video > Video Stream page. Select the H.264 tab. The settings defined in this
page will apply to all H.264 streams that do not use a stream profile.
The GOP length is the number of frames between two consecutive I-frames. Increasing the GOP length may save considerably on
bandwidth requirements in some cases, but may also have an adverse affect on image quality.
The Axis product supports the following H.264 profile(s):
• Baseline. The Baseline profile is recommended for clients that don't support CABAC entropy coding.
• Main. The Main profile provides higher compression with maintained video quality compared to the Baseline profile but
requires more processing power to decode.
• High. The High profile provides reduced bit rate and higher compression with maintained video quality compared to the
Main profile but requires more processing power to decode.
The bit rate can be set as Variable bit rate (VBR) or Maximum bit rate (MBR). VBR adjusts the bit rate according to the image
complexity, using up more bandwidth for increased activity in the image, and less for lower image activity. When the activity in
the scene increases, the bit rate would usually increase as well. If there is a surplus in bandwidth, this may not be an issue and
selecting Variable bit rate (VBR) will be sufficient. But if bandwidth is limited, it is recommended to control the bit rate by selecting
Maximum bit rate (MBR). When the activity in the scene increases, VBR adjusts the bit rate according to the complexity, using up
more bandwidth for increased activity in the scene, and less for lower scene activity. MBR allows you to set a target bit rate that
limits the bandwidth consumption.
The MBR target bit rate works like the ceiling of a tent. It limits the bit rate, while maintaining some flexibility. The bit rate
may bounce up and down within the set target but when it nears the set target value, the limitation kicks in. However, because
MBR will always prioritize a continuous video stream, it allows temporary overshoots from the target bit rate. Because setting a
target value prevents the bit rate from increasing, frame rate and image quality are affected negatively. To partly compensate for
this, select which variable shall be prioritized, frame rate or image quality. Not setting a priority means that frame rate and
image quality are equally affected.
The current bit rate can be set to appear as text overlay. Under Overlay Settings, select Include text and enter the modifier
#b in the field.
To apply the settings, click Save.

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 Events on page 33.
• When setting up continuous recording. See Continuous Recording on page 39.
• 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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