JVC VN-H37 Manual page 13

H.264 stream form the camera is sequence of I Picture and P Picture. Ratio of I Picture and P Picture depends on
I-Frame interval setting. Encode page of Web has the setting.
Example of H.264 Stream
HTTP response
Sequence Parameter Set
Picture Parameter Set
User data
I Picture
User data
P Picture
~
User data
I Picture
There are Sequence Parameter Set, Picture Parameter Set, and User data before each I Picture and there is User
data before each P Picture.
The following information is stored in the User data. Each item has a fixed length.
Item Size
Start code 4
NAL unit type 1
Payload type 1
User data size 1
Reserved 16
Model Name
18
Time Stamp
70
Camera ID 50
Motion Detect Result
7
Tampering Detect 14
Result
Example Note
0x00000001 Start code of User data in H.264 stream.
0x66 NAL unit type of User data in H.264 stream.
0x05 Payload type of User data in H.264 stream.
0xf0 Size of User data in H.264 stream.
0x030303030303030
－
30303030303030303
Product Name
type = VN-H137
This
timestamp =
hour/minute/second, millisecond and timezone code.
2012030623341253
8UTC
camera = input01 Camera ID that user can define
Specified as 1 if motion is detected at the time when
md = 1
data is created.
tampering = 0 Specified as 1 if tampering is detected at the time when
data is created.
is made up
1 3
of the year/month/day,