GB28181国标流媒体服务解决方案_2016版本-INVITE请求视频（UDP、TCP active、 TCP passive）

安防监控视频流媒体平台EasyGBS能够通过简单的网络摄像机通道配置，将传统监控行业里面的高清网络摄像机IP Camera、NVR等GB28181国标协议输出的设备、平台接入到EasyGBS，EasyGBS能够将这些视频源的音视频数据进行拉取，转换为RTMP/HLS/FLV/RTSP，进行全平台终端H5直播（Web、Android、iOS），并且EasyGBS能够将视频源的直播数据对接到第三方CDN网络，实现互联网级别的直播分发。

在GB28181里面，视频请求是最重要的环节，GB28181 2016版本最主要的新增内容估计就是请求视频的时候支持tcp active和tcp passive，其实早在GB28181 2014版本的时候都已经定义了tcp传输码流，tcp最大的好处就是对下载的时候能保证不丢包，下面简要说一下INVITE请求视频的流程：

下面简要粘贴一下抓包信息：

udp：

INVITE sip:64000000001310000001@6400000000 SIP/2.0
Call-ID: b8055bc7a97eec69318e6a38a9532cbb@0.0.0.0
CSeq: 1 INVITE
From: <sip:34020000002000000001@3402000000>;tag=35565509_53173353_01b54c44-9ff9-49bf-b63a-58e0c1064b22
To: <sip:64000000001310000001@6400000000>
Max-Forwards: 70
Contact: "34020000002000000001" <sip:192.168.1.81:5060>
Subject: 64000000001310000001:0-4-0,34020000002000000001:1
Content-Type: application/sdp
Route: <sip:64000000001310000001@192.168.1.93:5060;lr>
Via: SIP/2.0/UDP 192.168.1.81:5060;branch=z9hG4bK01b54c44-9ff9-49bf-b63a-58e0c1064b22_53173353_34843235799148
Content-Length: 221v=0
o=34020000002020000001 0 0 IN IP4 192.168.1.81
s=Play
c=IN IP4 192.168.1.81
t=0 0
m=video 6000 RTP/AVP 96 98 97
a=recvonly
a=rtpmap:96 PS/90000
a=rtpmap:97 MPEG4/90000
a=rtpmap:98 H264/90000
f=v/2/4///a///
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.1.81:5060;branch=z9hG4bK01b54c44-9ff9-49bf-b63a-58e0c1064b22_53173353_34843235799148
From: <sip:34020000002000000001@3402000000>;tag=35565509_53173353_01b54c44-9ff9-49bf-b63a-58e0c1064b22
To: <sip:64000000001310000001@6400000000>
Call-ID: b8055bc7a97eec69318e6a38a9532cbb@0.0.0.0
CSeq: 1 INVITE
Content-Length: 0SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.1.81:5060;branch=z9hG4bK01b54c44-9ff9-49bf-b63a-58e0c1064b22_53173353_34843235799148
Record-Route: <sip:64000000002000000001@192.168.1.93:5060;lr>
From: <sip:34020000002000000001@3402000000>;tag=35565509_53173353_01b54c44-9ff9-49bf-b63a-58e0c1064b22
To: <sip:64000000001310000001@6400000000>;tag=j3cF7SuJ
Call-ID: b8055bc7a97eec69318e6a38a9532cbb@0.0.0.0
CSeq: 1 INVITE
Contact: <sip:64000000001310000001@192.168.1.93:5060>
Content-Type: application/sdp
Content-Length:   220v=0
o=64000000001310000001 0 0 IN IP4 192.168.1.93
s=Play
c=IN IP4 192.168.1.93
t=0 0
m=video 20120 RTP/AVP 96 98 97
a=sendonly
a=rtpmap:96 PS/90000
a=rtpmap:98 H264/90000
a=rtpmap:97 MPEG4/90000
y=0000000003
ACK sip:64000000001310000001@192.168.1.93:5060 SIP/2.0
Call-ID: b8055bc7a97eec69318e6a38a9532cbb@0.0.0.0
CSeq: 1 ACK
From: <sip:34020000002000000001@3402000000>;tag=35565509_53173353_01b54c44-9ff9-49bf-b63a-58e0c1064b22
To: <sip:64000000001310000001@6400000000>;tag=j3cF7SuJ
Max-Forwards: 70
Route: <sip:64000000002000000001@192.168.1.93:5060;lr>
Via: SIP/2.0/UDP 192.168.1.81:5060;branch=z9hG4bK01b54c44-9ff9-49bf-b63a-58e0c1064b22_53173353_34843344467988
Content-Length: 0

tcp active：

INVITE sip:34020000001310000001@3402000000 SIP/2.0
Via: SIP/2.0/UDP 192.168.1.93:5060;rport;branch=z9hG4bK-3d09000-2b0348fd-yeqPDaq1
From: <sip:64000000002000000001@192.168.1.93:5060>;tag=98EB157C7A7D4152B78D2B9E097AF8C9
To: <sip:34020000001310000001@3402000000>
Call-ID: 98EB157C7A7D4152B78D2B9E097AF8C9
CSeq: 12 INVITE
Contact: <sip:64000000002000000001@192.168.1.93:5060>
Content-Type: application/sdp
Max-Forwards: 70
Subject: 34020000001310000001:1,64000000002000000001:1
Content-Length:   258v=0
o=64000000002000000001 0 0 IN IP4 192.168.1.93
s=Play
c=IN IP4 192.168.1.93
t=0 0
m=video 20108 TCP/RTP/AVP 96 98 97
a=recvonly
a=rtpmap:96 PS/90000
a=rtpmap:98 H264/90000
a=rtpmap:97 MPEG4/90000
a=setup:active
a=connection:new
y=0000000002
SIP/2.0 200 OK
To: <sip:34020000001310000001@3402000000>;tag=70848741_53173353_6a72b837-2678-46e9-9320-8db5a86f208c
Via: SIP/2.0/UDP 192.168.1.93:5060;rport=5060;branch=z9hG4bK-3d09000-2b0348fd-yeqPDaq1;received=192.168.1.93
CSeq: 12 INVITE
Call-ID: 98EB157C7A7D4152B78D2B9E097AF8C9
From: <sip:64000000002000000001@192.168.1.93:5060>;tag=98EB157C7A7D4152B78D2B9E097AF8C9
Contact: <sip:192.168.1.81:5060>
Content-Type: application/sdp
Content-Length: 245v=0
o=64010000002020000001 0 0 IN IP4 192.168.1.81
s=Play
c=IN IP4 192.168.1.81
t=0 0
m=video 5000 TCP/RTP/AVP 96 97 98
a=sendonly
a=rtpmap:96 PS/90000
a=rtpmap:97 MPEG4/90000
a=rtpmap:98 H264/90000
a=setup:passive
a=connection:new
y=0200000025
ACK sip:34020000001310000001@3402000000 SIP/2.0
Via: SIP/2.0/UDP 192.168.1.93:5060;rport=5060;branch=z9hG4bK-3d09000-2b0348fd-yeqPDaq1;received=192.168.1.93
From: <sip:64000000002000000001@192.168.1.93:5060>;tag=98EB157C7A7D4152B78D2B9E097AF8C9
To: <sip:34020000001310000001@3402000000>;tag=70848741_53173353_6a72b837-2678-46e9-9320-8db5a86f208c
Call-ID: 98EB157C7A7D4152B78D2B9E097AF8C9
CSeq: 12 ACK
Max-Forwards: 70
Content-Length: 0

tcp passive：

INVITE sip:34020000001310000001@3402000000 SIP/2.0
Via: SIP/2.0/UDP 192.168.1.93:5060;rport;branch=z9hG4bK-3d09000-16938bd4-JmZPS4tF
From: <sip:64000000002000000001@192.168.1.93:5060>;tag=DAD260A2BECC485BAFDDA3736EC724D9
To: <sip:34020000001310000001@3402000000>
Call-ID: DAD260A2BECC485BAFDDA3736EC724D9
CSeq: 190 INVITE
Contact: <sip:64000000002000000001@192.168.1.93:5060>
Content-Type: application/sdp
Max-Forwards: 70
Subject: 34020000001310000001:1,64000000002000000001:1
Content-Length:   326v=0
o=64000000002000000001 0 0 IN IP4 192.168.1.93
s=Download
u=34020000001310000001:3
c=IN IP4 192.168.1.93
t=1495173756 1495174056
m=video 20372 TCP/RTP/AVP 96 98 97
a=recvonly
a=rtpmap:96 PS/90000
a=rtpmap:98 H264/90000
a=rtpmap:97 MPEG4/90000
a=setup:passive
a=connection:new
a=downloadspeed:8
y=1000000025
SIP/2.0 200 OK
To: <sip:34020000001310000001@3402000000>;tag=01493985_53173353_fb041e78-db58-4fec-9660-625f28bd5e9a
Via: SIP/2.0/UDP 192.168.1.93:5060;rport=5060;branch=z9hG4bK-3d09000-16938bd4-JmZPS4tF;received=192.168.1.93
CSeq: 190 INVITE
Call-ID: DAD260A2BECC485BAFDDA3736EC724D9
From: <sip:64000000002000000001@192.168.1.93:5060>;tag=DAD260A2BECC485BAFDDA3736EC724D9
Contact: <sip:192.168.1.81:5060>
Content-Type: application/sdp
Content-Length: 268v=0
o=64010000002020000001 0 0 IN IP4 192.168.1.81
s=Download
c=IN IP4 192.168.1.81
t=0 0
m=video 5000 TCP/RTP/AVP 96 97 98
a=sendonly
a=rtpmap:96 PS/90000
a=rtpmap:97 MPEG4/90000
a=rtpmap:98 H264/90000
a=setup:active
a=connection:new
a=filesize:59770877
y=1200000016
ACK sip:34020000001310000001@3402000000 SIP/2.0
Via: SIP/2.0/UDP 192.168.1.93:5060;rport=5060;branch=z9hG4bK-3d09000-16938bd4-JmZPS4tF;received=192.168.1.93
From: <sip:64000000002000000001@192.168.1.93:5060>;tag=DAD260A2BECC485BAFDDA3736EC724D9
To: <sip:34020000001310000001@3402000000>;tag=01493985_53173353_fb041e78-db58-4fec-9660-625f28bd5e9a
Call-ID: DAD260A2BECC485BAFDDA3736EC724D9
CSeq: 190 ACK
Max-Forwards: 70
Content-Length: 0

流媒体这块就需要自己做处理了，一般检测的时候需要等待几秒钟，检测软件SPVMN不是那么快速，还有就是tcp active的时候，spvmn的端口不是协议中的端口，所以也不需要针对tcp端口进行筛选。

下面是GB/T28181流媒体服务器的播放效果

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GB28181国标流媒体服务解决方案_2016版本-INVITE请求视频（UDP、TCP active、 TCP passive）

下面是GB/T28181流媒体服务器的播放效果

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