JVC VN-V686UAPI manual Restrictions, MPEG-4 Stream Format Sent Out by VN-V686

Server: JVC VN-V686 Network Camera<CRLF>

x-vnv686_response:

encode=mpeg4&framerate=30&framesize=vga&ptz_info=off<CRLF><CRLF>

MPEG-4 framerate can be changed by Web page or API. When MPEG-4 framerate is changed, the framerate of current stream is changed also.

2.4.Restrictions

Access restriction

VN-V686 has access restriction feature that enables to deny access from a specific IP address. If MPEG-4 is requested from the IP address of access restriction, VN-V686 disconnects the TCP connection after API is sent.

Restriction by maximum bitrate of VN-V686

The maximum bitrate of VN-V686 is about 20 Mbps.

Number of clients

The maximum number of clients that can get MPEG-4 stream depends on encode settings and JPEG clients. Refer the instruction manual for detailed information.

2. MPEG-4 Stream Format Sent Out by VN-V686

MPEG-4 stream from VN-V686 is MPEG-4 Part 2(ISO/IEC 14496-2) compliant, level 3 of simple profile. It is a sequence of I-VOPs, or I-VOPs and P-VOPs.

I-VOP: Intra frame compressed data

P-VOP: Inter frame compressed data with previous frame

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

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