Advanced - Mpeg-4 - Axis 213 PTZ User Manual

Advanced - MPEG-4

Client Compatibility
The AXIS 213 PTZ supports the following different MPEG-4 profiles and levels:
Profile@Level
Advanced Simple Profile @ Level 3
Advanced Simple Profile @ Level 5
To use Advanced Simple Profile @ Level 3, select ISMA compliant and click the Save button.
Level 5 is preferred if there is enough bandwidth available, as the image quality of the video stream is better
than at level 3. The viewing client must support the profile used for the video stream, otherwise the MPEG-4
stream cannot be viewed.
Note:
The Axis Media Control supports all the configuration possibilities described on this page.
GOV Settings
The GOV structure can be set to either I or IP, which describes the type of images included in the video
stream, as well as their internal order. The IP-structure generally sends the differences compared to the
previous image and far fewer complete images, so this method uses much less bandwidth than the
I-structure. The I-structure gives higher frame rates when using a high resolution, but requires more
bandwidth.
The GOV length determines the sum total of P-images and I-images in a GOV. Setting the GOV length to a
high value saves considerably on bandwidth. However there may be noticeable decay in the image at high
values.
Notes:
• GOV = Group of VOPs
• VOP = Video Object Plane
• Video Object Plane = image
Properties
Max bit rate = 768 kbit/s, ISMA compliant
Max Bit rate = 8 Mbit/s
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