User manual

AXIS Q6032-E PTZ Dome Network Camera

Video

The following settings are availa ble:

• Resolution. Select the default resolution.

• Compression. The compression level affects the image quality, bandwidth and ﬁle size of saved images; the lower the

compression, the higher the image quality with higher bandwidth requirements and larger ﬁle sizes.

• Rotate image. If required, the image can be rotated.

• Maximum frame rate. To avoid bandwidth problems, the frame rate allowed to each viewer can be limited.

• Overlay settings.See

Overlay, on page 18

Click Save to apply the new settings.

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 stream consists of different types of frames such as I-frames and P-fr ames. An I-fra me is a complete image where as

P-frames only contain the differences from previous frames.

The GOV length is the number o f frames between two consecutive I-frames. Increasing the GOV length may save considerably o n

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

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

complexity, using up more bandwidth for increas ed activity in the image, a nd less for lower ima ge activity. CBR allows you to s et a

ﬁxed Target bit rate that consumes a predictable amount of bandwidth. As the bit rate would usually need to increas e 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 can take effect.

The current bit rate can be set to appear as text overlay. To do this, select the Inc

lude text check box option under Overlay

Settings and enter the modiﬁer #b in the ﬁeld.

MJPEG

Sometimes the image size is large due to low light or complex scenery. Adjusting the ma ximum frame size helps to control the

bandwidth and storage used by the Motion JPEG video stream in the

se situations. Setting the frame size to the Default setting

provides consistently good im age quality at the expense of increased band width and storage usage in low light. Limiting the frame

size optimizes bandwidth and storage usage, but may give poor image quality. To prevent increased bandwidth and storage usage,

the maximum frame size should be set to an op

timal value.

Stream Proﬁles

Astreamproﬁle is a set of pre-conﬁgured stream settings including resolution, compression, f rame rate and overlay settings.

Stream proﬁles can be used:

• When setting up recording using action rules, see

Events, on page 31

• When setting up a continuous recording, see

Continuous Recording, on page 35

• In the Live View page — select the stream proﬁle fro m the Stream proﬁle drop-down list.

Four pre-programmed stream proﬁles are availab le for quick set up. Each pre-programmed proﬁle has a descriptive name, indicating

its purpose. If required, the pre-programmed stream proﬁles can be modiﬁed and n ew customized stream proﬁles can be crea ted.

To create a new proﬁle or modify an existing proﬁle, go to Setup > Video > Stream Proﬁles.

To sele ct a d efault stream proﬁle for the Live View page, go to Setup > Live View Conﬁg.