User manual

ARECONT VISION USER MANUAL 70

Arecont Vision 425 E Colorado St, 7

Floor Glendale, CA 91205 8/1/2012

www.arecontvision.com

3. Convey the viewer password to the users.

In order to delete viewer password, log-in as admin and change the viewer password to a reserved password

empty – this would restore the full anonymous access to the camera. The admin user can change the viewer

password at any time, without knowing the current viewer password.

NOTE: If the admin password has been set and forgotten, it can only be erased through reprogramming the

camera’s firmware or by accessing the camera registers via developers’ register access from AV100 software.

HTTP/1.1 vs. HTTP/1.0

Arecont Vision cameras support both HTTP/1.0 and HTTP/1.1 protocols as defined by RFC-1945 and RFC-

2068, respectively. While HTTP/1.0 is simple, it limits the speed of image transmission for cases when the

user requests individual images rather than an mjpeg stream. This is due to the fact that connection is closed

after the transmission of each image, forcing the client to incur round trip delay repeatedly. However,

HTTP/1.0 is supported by all HTTP implementations and can be used reliably, albeit with limited speed. By

default, Arecont Vision cameras are configured to respond using HTTP/1.0 protocol regardless of the HTTP

version used by the client.

Users who desire faster full duplex communication and image delivery may request responses using the

HTTP/1.1 protocol. To do so, the user should append the parameter ver=HTTP/1.1 to the request string as

shown in the following example:

http://192.168.0.36/image?res=full&x0=0&y0=0&x1=1600&y1=1200&quality=12&doublescan=0&ver=HTTP/1.1

It is important to note that Arecont Vision cameras implement “chunked” transfer encoding as defined by

paragraph 14.40 of RFC-2068. While RFC-2068 requires that all HTTP/1.1 implementations support “chunked”

encoding, in reality many older implementations (Indy 9, WinHTTP 5.0, etc) are not fully compliant with the

requirements of the standard. As a result, if the HTTP/1.1 protocol is requested from a non-compliant

implementation, the chunks separators will remain in the data stream and the jpeg image will be corrupted. If

the user receives corrupted images over HTTP/1.1 the user should either remove HTTP/1.1 specification from

the request or upgrade the HTTP implementation to fully compliant (e.g. WinHTTP 5.1)

HTTP Access of Panoramic Cameras

Notational conventions:

camera_ip : IP address of the camera;