JVC 137 Manual De Usuario
16
Ratio of I-VOP and P-VOP depends on I-Frame interval setting. Encode page of Web has the setting.
First VOP can be I-VOP or P-VOP. If client want to decode from I-VOP, please skip P-VOP and wait first I-VOP.
Example of MPEG-4 Stream
HTTP response
P-VOP
P-VOP
P-VOP
VOL
I-VOP
P-VOP
~
There are VOL, Userdata1, GOV and Userdata2 before each I-VOP.
Data structure before I-VOP
Item
Note
VOL
VOL of MPEG-4 Video
Userdata1
Reserved
GOV
GOV of MPEG-4 Video
Userdata2
Userdata
Data structure of Userdata2
Item
Size
Example
Note
Start code
4
0x000001B2
Start code of User data in MPEG-4 stream.
Model Name
18
type = VN-H137
Product Name
Time Stamp
70
timestamp
=
2012030623341253
8UTC
8UTC
This
is
made
up
of
the
year/month/day,
hour/minute/second, millisecond and timezone code.
Camera ID
50
camera = input01
Camera ID that user can define
Motion Detect Result
7
md = 1
Specified as 1 if motion is detected at the time when
data is created.
data is created.
Tampering Detect
Result
14
tampering = 0
Specified as 1 if tampering is detected at the time when
data is created.
data is created.
Pan position
16
digipan = 123
Indicates pan position in pixels from 0 to 1278.
Tilt position
17
digitilt = 123
Indicates tilt position in pixels from 0 to 958.
Zoom position
17
digizoom = 1.23
Indicates zoom value from 1.00 to 8.00.
Preset Posision
Number
Number
15
position = 19
Indicates preset position number after moving to
preset position
preset position
. In other cases, position = NA.