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VOL
I-VOP
P-VOP
There are VOL, Userdata1, GOV and Userdata2 before each I-VOP.
Data Structure before I-VOP
Item
VOL
Userdata1
GOV
Userdata2
Data Structure of Userdata2
Item
Example
Start Code
0x000001B2
Product Name
type = VN-V686U
Timestamp
Timestamp =
20070319161455123UTC
Camera ID
camera = Camera01
Preset Position
position = 0
Number
Fan status
fan = 0
Intelligent
tracking
track_status = 0
status
3. API to Search VN-V686
VN-V686 in LAN can be searched by broadcast packet that includes this API.
Search VN-V686 in LAN
Protocol
Send udp packet with following text in UDP payload to destination port number 80. Source port number
can be any value.
system.id<CRLF>
Response
VN-V686 that received this packet sends udp packet to the source port number of the search packet.
UDP payload of response packet has model name, IP address, and subnet mask. VN-V686 waits 0-0.7 second before
sending response to avoid too many responses are sent in short period from many VN-V686s.
Note
VOL of MPEG-4 Video
Reserved
GOV of MPEG-4 Video
Userdata
Note
Start code of userdata in MPEG-4 Video
Product Name
Year, Month, Day, Hour, Minute, Second,
Millisedond, and Time zone
Camera ID that user can define
Indicates preset position number after moving to
preset position
. In other cases, position = NA.
Indicates status of fan
Indicates status of Intelligent tracking
completed, 1 means waiting for specifying target, 2 means
tracking, and 3 means losing.
14
. 1 means error.
. 0 means
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