SOS!!! Http Live Streaming problems etc.

This tool is about mediastreamvalidator apple provides usage

This document in accordance with the official http://developer.apple.com/library/ios/ # technotes/tn2224/_index.htmlTest results should appear as follows \ focuses on video bitrate and audio bitrate
appear

 
Validating http://devimages.apple.com/iphone/samples/bipbop/gear3/prog_index.m3u8against iOS 3.1.0 

Average segment duration: 8.77 seconds 
Average segment bitrate: 510.05 kbit / s 
Average segment structural overhead: 96.37 kbit / s (18.89%) 

Video codec: avc1 
Video resolution: 480x360 pixels 
Video frame rate: 29.97 fps 
Average video bitrate: 407.76 kbit / s 
H.264 profile: Baseline 
H.264 level: 2.1 

Audio codec: aac 
Audio sample rate: 22050 Hz 
Average audio bitrate: 5.93 kbit / s 

But I try to go through every possible outcome can occur only two trekking
As follows:

 
Average segment duration: 9.79 seconds 
Average segment bitrate: 74109.89 bps 

Is speaking segment bitrate of. . . . This data seems to me completely useless ah
There are heroes can help to answer it


1 how to appear video bitrate and audio bitrate?
2 now appears average segment bitrate in the end what's the use?

Thank answered