2012-06-08 846 views
5

我有网络IP摄像机(佳能VB-M40)。本相机支持ONVIF协议。我正在使用C语言在窗口中实现其ONVIF功能。我使用以下请求获得了它的RTSP URI。从支持ONVIF协议的网络摄像机获取实时流?

snprintf(postData, sizeof(postData), 
     "<?xml version=\"1.0\" encoding=\"utf-8\"?>" 
     "<soap:Envelope xmlns:soap=\"http://www.w3.org/2003/05/soap-envelope\" " 
     "xmlns:tds=\"http://www.onvif.org/ver10/media/wsdl\"" 
     "xmlns:tt=\"http://www.onvif.org/ver10/schema\">"    
     "<soap:Body>" 
     "<tds:GetStreamUri>" 
     "<tds:StreamSetup>" 
      "<tt:Stream>0</tt:Stream>" 
      "<tt:Transport>" 
      "<tt:Protocol>HTTP</tt:Protocol>" 
      "</tt:Transport>" 
     "</tds:StreamSetup>" 
     "<tds:ProfileToken>profile1</tds:ProfileToken>" 
     "</tds:GetStreamUri>" 
     "</soap:Body></soap:Envelope>", 
     username, digest_str, nonce_str, time_str); 

和响应是:

<?xml version="1.0" encoding="UTF-8"?> 
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://www.w3.org/2003/05/soap-envelope" 
        xmlns:SOAP-ENC="http://www.w3.org/2003/05/soap-encoding" 
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
        xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
        xmlns:wsa5="http://www.w3.org/2005/08/addressing" 
        xmlns:c14n="http://www.w3.org/2001/10/xml-exc-c14n#" 
        xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" 
        xmlns:ds="http://www.w3.org/2000/09/xmldsig#" 
        xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" 
        xmlns:MC2="http://www.onvif.org/ver10/schema" 
        xmlns:MC3="http://www.w3.org/2005/05/xmlmime" 
        xmlns:MC4="http://docs.oasis-open.org/wsn/b-2" 
        xmlns:MC10="http://www.w3.org/2004/08/xop/include" 
        xmlns:MC5="http://docs.oasis-open.org/wsrf/bf-2" 
        xmlns:MC6="http://docs.oasis-open.org/wsn/t-1" 
        xmlns:CC="http://www.canon.com/ns/networkcamera/onvif/va/schema" 
        xmlns:MC1="http://www.onvif.org/ver10/media/wsdl" 
        xmlns:MC8="http://www.onvif.org/ver20/analytics/wsdl/RuleEngineBinding" 
        xmlns:MC9="http://www.onvif.org/ver20/analytics/wsdl/AnalyticsEngineBinding" 
        xmlns:MC7="http://www.onvif.org/ver20/analytics/wsdl" 
        xmlns:ter="http://www.onvif.org/ver10/error" 
        xmlns:wsnt="http://docs.oasis-open.org/wsn/b-2" 
        xmlns:tns1="http://www.onvif.org/ver10/topics"> 
    <SOAP-ENV:Header></SOAP-ENV:Header> 
    <SOAP-ENV:Body> 
     <MC1:GetStreamUriResponse> 
      <MC1:MediaUri> 
       <MC2:Uri>rtsp://192.168.5.53:8090/profile1=r</MC2:Uri> 
       <MC2:InvalidAfterConnect>false</MC2:InvalidAfterConnect> 
       <MC2:InvalidAfterReboot>true</MC2:InvalidAfterReboot> 
       <MC2:Timeout>PT0M0S</MC2:Timeout> 
      </MC1:MediaUri> 
     </MC1:GetStreamUriResponse> 
    </SOAP-ENV:Body> 
</SOAP-ENV:Envelope> 

根据ONVIF规范,一旦我得到的流URI我应该发送 'DESCRIBE' 请求发送到设备。我正在使用此过程,因为我需要在TCP上进行流式传输。

我的问题是如何发送'DESCRIBE'请求到设备和哪个套接字?

我应该在发送GetStreamURI请求的同一个套接字上发送此请求。或者我必须创建另一个。请求的格式是什么?

回答

3

将它发送到与端口554上的GetStreamUri请求(或RTSP设备中配置的其他端口)相同的主机。然后你必须在DESCRIBE之前发送OPTIONS请求。它可能会在其正文中返回401 Unauthorized状态和nonce + realm值。 (我用diferent地址,然后你在GetStreamUri收到响应。)

Request: 
OPTIONS http://192.168.128.99:80/profile1/media.smp RTSP/1.0\r\n 
CSeq: 1\r\n 
User-Agent: MyAgent\r\n\r\n 

Response: 
RTSP/1.0 401 Unauthorized 
CSeq: 1 
Date: Thu Jun 28 05:39:55 2012 GMT 
Expires: Thu Jun 28 05:39:55 2012 GMT 
Cache-Control: must-revalidate 
WWW-Authenticate: Digest realm="iPOLiS", nonce="00000000000000000000000048E02F14" 

阅读此境界和现时价值,因为你需要它autorization和发送另一个授权OPTIONS请求。

OPTIONS http://192.168.128.99:80/profile1/media.smp RTSP/1.0\r\n 
CSeq: 2\r\n 
Authorization: Digest username="admin", realm="iPOLiS", nonce="00000000000000000000000048E02F14", uri="http://192.168.128.99:80/profile1/media.smp", response="23a5a81fb98b6cb29368eba060ba31b9"\r\n 
User-Agent: MyAgent\r\n\r\n 

响应是产生this way

然后来DESCRIBE请求

DESCRIBE http://192.168.128.99:80/profile1/media.smp RTSP/1.0\r\n 
CSeq: 3\r\n 
User-Agent: MyAgent\r\n\r\n 

和响应

RTSP/1.0 200 OK 
CSeq: 3 
Date: Thu Jun 28 05:46:20 2012 GMT 
Expires: Thu Jun 28 05:46:20 2012 GMT 
Content-Base: http://192.168.128.99:554/profile1/media.smp/ 
Content-Type: application/sdp 
Content-Length: 498 
x-Accept-Retransmit: our-retransmit 
x-Accept-Dynamic-Rate: 1 
Cache-Control: must-revalidate 

v=0 
o=- 0 0 IN IP4 192.168.128.9 
s=Media Presentation 
i=samsung 
c=IN IP4 0.0.0.0 
b=AS:384128 
t=0 0 
a=control:http://192.168.128.99:554/profile1/media.smp 
a=range:npt=now- 
m=video 40336 RTP/AVP 26 
b=AS:384000 
a=rtpmap:26 JPEG/90000 
a=control:http://192.168.128.99:554/profile1/media.smp/trackID=v 
a=cliprect:0,0,768,1024 
a=framesize:26 1024-768 
a=framerate:5.0 
m=audio 40338 RTP/AVP 0 
b=AS:64 
a=rtpmap:0 PCMU/8000 
a=control:http://192.168.128.99:554/profile1/media.smp/trackID=a 

从这个响应地址在一个=对照:HTTP://192.168。 128.99:554/profile1/media.smp/trackID = v应解析媒体m = video(其SDP pr otocol)。那是我得到了多少。下一个过程应该是使用传输信息进行SETUP请求,然后发送PLAY请求。您必须监听您在SETUP请求中指定的端口以接收图像。

+1

由于GetStreamUri返回'rtsp://192.168.5.53:8090/profile1 = r',所以要联系的RTSP服务器不在端口554上。 – mpromonet