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AXIS M1014 Network Camera
Video
Image
The default image settings can be configured under Video> Video Stream. Select the Image tab.
The follo wing settings are available :
• 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.
• Mirror. If required, the image can be mirrored.
• Maximum frame rate. To avoid bandwidth problems, the frame rate allowed to e ach viewer can be limited.
• Overlay settings.See
Overlay, on page 17
.
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 c onsists of different types of frames such as I-frames and P-frames. An I -frame is a complete image whereas
P-frames only contain the differences from previous 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 ma y 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 increased activity in the image, a nd less for lower image activity. CBR allows you to set a
fixed Ta rget bit rate that consumes a predictable amount of bandwidth. As the
bit rate would usually need toincreaseforincreased
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 fra me rate or image quality. Not setting a priority me ans that frame rate and image quality are eq ually
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 Include 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 maximum frame size helps to control the
bandwidth and storage 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 low light. Limiting the frame
size optimizes bandwidth and storag e usage, but may give poor im age quality. To prevent increased bandwidth and storage usage,
the maximum frame siz
e should be set to an optimal value.
Stream Profiles
Astreamprofile is a set of pre-confi gured stream settings including resolution, compression, frame rate and overlay settings.
Stream profiles can be used:
• When setting up recording using action rules, see
Events, on page 26
.
• When setting up a continuous recording, see
Continuous Recording, on page 29
.
• In the Live View page — select the stream profile from the Stream profile drop-down list.
Four pre-programmed stream pro files are available for quick set up. Each pre-programmed p rofile has a descriptive name, indicating
its purpose. If required, the pre-programmed stream profiles can be mo difi ed and new customized stream profiles can be crea ted.
To crea te a new profi le or modify an existing profile, go to Setup > Video > Stream Profiles.
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