Axis Communications 216FD user manual Frame rates Motion Jpeg and MPEG-4, Bandwidth

AXIS 216FD - Technical Specifications 53

Frame rates - Motion JPEG and MPEG-4

The following table show typical frame rates in frames/second (fps) for Motion JPEG and MPEG-4 video streams from the AXIS 216FD.

Note that these values are guidelines only - actual values may vary.

Motion JPEG settings:
			Frame rates
•	Viewing in AMC
			Motion JPEG	MPEG-4
•	Compression level = 30%	640x480	30	30
		480x360	30	30
MPEG-4 settings:
		320x240	30	30
•	Viewing in AMC	160x120	30	30

• Compression level = 30%

• GOV length = 132

Bandwidth

As there are many factors that affect bandwidth, it is very difficult to predict the required amounts. The settings that affect bandwidth are:

•image resolution

•image compression

•frame rate

•MPEG-4 GOV settings

•bit rate control settings

There are also factors in the monitored scene that will affect the bandwidth. These are:

•amount of motion

•image’s complexity

•lighting conditions

For MPEG-4, if there is only limited bandwidth available, and if this is more important than the image quality, using a constant bit rate (CBR) is recommended. Use a variable bit rate (VBR) if the image quality needs to be maintained at a higher level. If supported on the network, consider also using MPEG-4 multicasting, as the bandwidth consumption will be much lower.