s= (session name) //表明本次会话的标题,或会话的名称
i=* (session information)
u=* (URI of description)
e=* (email address)
p=* (phone number)
c=* (connection information - not required if included in all media)
b=* (zero or more bandwidth information lines)
One or more time descriptions ("t=" and "r=" lines, see below)
z=* (time zone adjustments)
k=* (encryption key)
a=* (zero or more session attribute lines)
Zero or more media descriptions
Time description
t= (time the session is active)
r=* (zero or more repeat times)
Media description, if present
m= (media name and transport address)
例如: m=audio3458RTP/P09697//m行又称媒体行,描述了发送方所支持的媒体类型等信息(1:第一个参数为媒体名称:表明支持音频类型。2:第二个参数为端口号,表明UE在本地端口为3458上发送音频流。3:第三个参数为传输协议,一般为RTP/P协议。4:四-七参数为所支持的四种净荷类型编号)
m=video3400RTP/P9899 //m行又称媒体行,描述了发送方所支持的媒体类型等信息
i=* (media title)
c=* (connection information - optional if included at
session-level)
b=* (zero or more bandwidth information lines)
k=* (encryption key)
a=* (zero or more media attribute lines)
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你的意思是为了发展经济
在这里你说关你鸟事