JVC VN-H57, 257VP, 137, 237VP, 157WP, VN-H37 specifications Example of H.264 Stream

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

IPicture

User data

P Picture

~

User data

IPicture

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	Example		Note
Start code	4	0x00000001		Start code of User data in H.264 stream.
NAL unit type	1	0x66		NAL unit type of User data in H.264 stream.
Payload type	1	0x05		Payload type of User data in H.264 stream.
User data size	1	0xf0		Size of User data in H.264 stream.
Reserved	16	0x030303030303030
		30303030303030303		－
Model Name	18	type = VN-H137		Product Name
Time Stamp	70	timestamp	=	This is made up of the year/month/day,
		2012030623341253		hour/minute/second, millisecond and timezone code.
		8UTC
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.
Tampering Detect	14	tampering = 0		Specified as 1 if tampering is detected at the time when
Result				data is created.

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