rtsp协议 编码_udp协议_视频编码协议(8)

rtsp_URL = ( "rtsp:" | "rtspu:" ) "//" host [ ":" port ] [ abs_path ]

host = <合法的Internet主机域名或IP地址(用十进制数及点组成), 见RFC1123，2.1节定义>

port = *DIGIT

abs_path 在 [H3.2.1]中定义如下：

abs_path = "/" rel_path

rel_path = [ path ] [ ";" params ] [ "?" query ]

path = fsegment *( "/" segment )

fsegment = 1*pchar

segment = *pchar

params = param *( ";" param )

param = *( pchar | "/" )

scheme = 1*( ALPHA | DIGIT | "" | "-" | "." )

net_loc = *( pchar | ";" | "?" )

query = *( uchar | reserved )

fragment = *( uchar | reserved )

pchar = uchar | ":" | "@" | "&" | "=" | ""

uchar = unreserved | escape

unreserved = ALPHA | DIGIT | safe | extra | national

escape = "%" HEX HEX

reserved = ";" | "/" | "?" | ":" | "@" | "&" | "=" | ""

extra = "!" | "*" | "'" | "(" | ")" | ","

safe = "$" | "-" | "_" | "."

unsafe = CTL | SP | <"> | "#" | "%" | "<" | ">"

national = <any OCTET excluding ALPHA, DIGIT,

reserved, extra, safe, and unsafe>

权威的URL语法及语义信息请参见RFC1738[4]和RFC1808[9]。

[注意]：段(fragment)和询问(query)标识符在这时没有明确的定义，需要到RTSP服务器上解释。

rtsp要求使用可靠协议（Internet的TCP协议）发出命令，而rtspu则使用不可靠协议（Internet的UDP协议）。

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