User manual

ARECONT VISION USER MANUAL 72
Arecont Vision 425 E Colorado St, 7
th
Floor Glendale, CA 91205 8/1/2012
www.arecontvision.com
x0,y0,x1,y1 are the left, top, right and bottom coordinates of the requested image window,
respectively. These values cannot exceed the size of the image sensor array.
Quality – image quality, the inverse of image compression level;
Doublescan allows the user to specify whether the camera should delay the image output
until a new image is available (doublescan = 0) or the image request should be serviced by
outputting the content of the image buffer that was already once output (useful for picture-in-
picture display).
Id is an arbitrary number used to control the web browser’s cache;
SSN a unique HTTP session number which cancels out any earlier sent HTTP request with
the same number which got “hung”.
NOTE: Image requests without the <channel> parameter specified will cause the camera to
transmit the next available image from any of the currently enabled channels. The channel
number of the transmitted image could then be identified from the HTTP header Etag (see
RFC-2068 HTTP 1.1): ETag: Channel<channel> .
1.2 Requesting images using an implicit parameter list (parameters are loaded on camera in advance
using separate http commands (see section B 16 below):
http://camera_ip/img.jpg?[id=(0..99999999999999)]&[ssn=(0..65535)]
Where:
id – an arbitrary number used to control the web browser’s cache;
ssn – a unique HTTP session number which cancels out any earlier sent HTTP request with
the same number which got “hung”.
2. Requesting a continuous Motion JPEG image stream
http://camera_ip/mjpeg[<channel>]?res=(half|full)&x0=(0..1600)&y0=(0..1200)&x1=(32..1600)&y1=(3
2..1200)&quality=(1..21)&doublescan=(0|1)&[fps=(0..15)]&[id=(0..99999999999999)]&[ssn=(0..65535
)]
Where:
Res can have value of either “half” or “full” and specifies whether the camera should
decimate the image by a factor of 2 in each dimension or display the full resolution.