User manual

ARECONT VISION USER MANUAL 74

Arecont Vision 425 E Colorado St, 7

Floor Glendale, CA 91205 8/1/2012

www.arecontvision.com

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 produce the full resolution image.

 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 for the specific camera

model and should be divisible by 32 if Res = full and 64 if Res = half.

 QP is the quantization parameter for H.264 encoder. To achieve a higher quality video, a low

needed. Recommended values are in the range (16..37);

 SSN

specifies the stream identifier. MPEG codecs including H.264 codecs are context dependent

(decoding of the current frame depends on the previous frame(s)). The stream is a sequence of

frames of the same resolution which can be decoded sequentially by one instance of an MPEG

decoder. Accordingly, SSN

is a means to distinguish different streams from one another. Use a

unique SSN

for each stream with a unique channel, image size, quality, and/or frame rate. Each

camera supports up to eight simultaneous non-identical streams. Each client must have a unique

(ip:

ssn)

 Bitrate is used to set up a constant bitrate of the H.264 stream in kilobits per second. If this parameter

is present in the request string and is larger than zero then the QP parameter is ignored and the

camera adjusts quantization parameters automatically to maintain the specified bitrate.

 FPS specifies the requested frame rate. Values 1 to 15 result in the specified frame rate. Omitting the

fps parameter or using fps values of 0 or any values above 16 will result in maximum frame rate

which is model dependent.

Getting and Setting Camera Parameters

NOTE: All commands listed below that allow parameter setting without explicitly specifying the channel

number apply to all four channels.

NOTE: The parameter setting is allowed only for the users with the admin access level (see below under

Camera Access Control).

1. Enabling camera channels:

http://camera_ip/get?channelenable

http://camera_ip/set?channelenable=(1..15 as a 4-bit mask where each bit corresponds to one

camera channel, LSB is channel 1)

2. Image rotation: