User manual

AXIS P7224

Video and Audio

An image or text can be superimposed over the image as overlay. See Overlay, on page 18.

Save your settings before they can take effect.

H.264

H.264, also known as MPEG-4 Part 10/AVC, is a video compression standard that provides high quality video streams at low bit rates.

An H.264 video s tream consists of different types of frames such as I-frames, P-f rame s and B-frames. An I-frame is a complet e image

whereas P-frames and B-frames only contain the differences from previous/future frames.

The GOV length is the number of frames between two consecutive I-frames. Increasing the GOV length may save considerably on

bandwidth requirements in some cases, but may also have an adverse affect on imag e quality.

ThebitratecanbesetasVariable Bit Rate (VBR) or Constant Bit Rate (CBR). VBR adjusts the bit rate according to the image

complexity, u sing up more bandwidth for increased activity in the image, and less for lower image activity. C B R allows you to set a

ﬁxed Target bit rate that consumes a predictable amount of bandwidth. As the bit rate would usually need to increase for increased

image activity, but in this case cannot, frame rate and image quality are affected negatively. To partly compensate for this, it is

possible to prioritize either frame rate or image quality. Not setting a priority means that frame rate and image quality are equally

affected. You must save your settings before they c an take effect.

The current bit rate can be set to appear as text overlay. To do this, select the Include text check box option under Overlay Settings

and enter the code #b in the ﬁeld.

MJPEG

Sometimes the image s ize is large due to low light or complex scene ry. Adjusting the maximum frame size helps to control the

bandwidth and storag e used by the Motion JPEG video stream in these situations. Setting the frame size to the Default setting

provides consistently good image quality at the expense of increased bandwidth and storage usage in lo w light. Limiting the frame

size optimizes bandwidth a nd storage usage, but may give poor image quality. To prevent i ncreased bandwidth and storage usage,

the maximum frame size should be set to an optimal value.

Quad stream

A Quad vie w displays images from all four channels on a single screen; where the image s from each camera take up a quarter of

the display area. It is possible to deﬁne settings for the video stream in quad view.

Stream Proﬁles

There are four pre-programmed stream proﬁles available for quick set up. The settings for these can be adjusted. New customized

proﬁles can also be created. Each proﬁle has

a descriptive name, indicating its purpose.

•Thestreamproﬁles can be accessed fro

mtheStream proﬁle drop-down list in the Live View page.

• To add, copy, modify, and

remove stream proﬁles go to Video & Audio > Stream Pro ﬁles.

• To select the defaul

tstreamproﬁle go to Live View Conﬁg > Stream Proﬁle and choose the proﬁle from the drop-down list.

For more information see the online help

on this page.

Camera Settings

The Video & Audio > Camera Settings page provides access to advanced image settings for the Axis product.

mage Appearance

The image Brightness can be adjusted in the range 0–100, where a higher value produces a brighter image.

The Contrast changes the relative difference between light and dark. It can be adjusted using the slidebar.