nvr已经在sip服务器注册成功，并且获取nvr设备列表信息等正常。
发送invite时，一直返回400.
sip服务id：37070000082008000001
nvr id：37070000081118000001
nvr内部摄像头id：37070000081318000001
跪求大神给指点下哪个数据存在问题。
下面是请求的全部数据信息。
跪谢。。。。。。
INVITE sip:37070000081118000001@3707000008.spvmn.cn SIP/2.0
Via: SIP/2.0/UDP 192.168.1.90:5060;branch=z9hG4bKXKhQ5IAZXsDuzQdjFNuQ0wKpegR5ZyNq;rport
CSeq: 1 INVITE
From: "sipserver" <sip:37070000082008000001@3707000008>;tag=1592039587901713000
To: <sip:37070000081118000001@3707000008.spvmn.cn>
Call-ID: ZwRgS3bsa4oHAayDdxtKLaTHOfumaubI
Contact: <sip:37070000081118000001@3707000008.spvmn.cn>
Max-Forwards: 70
User-Agent: GoSIP
Content-Type: APPLICATION/SDP
Content-Length: 282
Allow: INVITE, ACK, CANCEL, REGISTER, MESSAGE
Supported:
v=0
o=37070000082008000001 1592039587901680000 1592039587901680000 IN IP4 192.168.1.90
s=Play
y=07000000002
u=37070000081318000001
c=IN IP4 192.168.1.90
t=0 0
m=video 5498 RTP/AVP 98 96 97
a=rtpmap:98 H264/90000
a=rtpmap:96 PS/90000
a=rtpmap:97 MPEG4/90000
a=recvonly
与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
