User manual

ARECONT VISION USER MANUAL 73

Arecont Vision 425 E Colorado St, 7

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).

FPS specifies the desired frame rate.

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: MJPEG requests without <channel> parameter specified will cause the camera to transmit

next available image from any of the currently enabled channels. The channel number of the

transmited image could then be identified from the HTTP header Etag (see RFC-2068 HTTP 1.1):

ETag: Channel<channel> .

In addition to JPEG streaming, panoramic camera models AV8185 and AV8365 support h.264

streaming using RTSP/RTP protocol. Any RTSP request sent to camera via UDP will be ignored.

The actual video stream is transmitted by the camera using RTP protocol. Arecont Vision cameras

support two options for RTP transmission: RTP over UDP, and RTP over TCP (RTP/AVP). The

maximum number of simultaneously serviced unicast requests or video streams is up to twelve per

panoramic camera allocated among its enabled channels. For example three video streams per

channel for each of the four channels are supported.

Accessing video stream via RTSP commands in AV8185 and AV8365:

An H.264 video stream is requested via RTSP using the following URL. Please note that this URL will not

work in a typical web browser. A media player such as VLC or Apple Quicktime is required for this to

function properly.

rtsp://camera_ip/h264.sdp<channel>?res=(half|full)&x0=(0..1600)&y0=(0..1200)&x1=(32..1600)&y1=(

32..1200)&qp=(4..51)&ssn=(1..65535)&[bitrate=(0..65536)]&[fps=1..100]