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AXIS P1204 Network Camera
Video
Image
The default image settings ca n be configured under Video> Video Stream. Select the Image tab.
The following settings are availa ble:
• Resolution. Select the default resolution.
• Compression. The compression level affects t he image quality, bandwidth and file size of saved images; the lower the
compression, the higher the image quality with hig h er 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 each viewer can be limited.
• Overlay settings.SeeOverlay 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 consists of different types of frames such as I-frames and P-frames. An I-frame is a comple t e image whe re as
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 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 incre ased a ctivity in t he image, a nd le ss for lo wer ima ge a c tivity. 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 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 frame rate or image quality. Not setting a priority means that frame rate and image quality are equally
affected. Yo u 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 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 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 siz
e should be set to an optimal value.
Stream Profiles
There are four pre-programmed stream profiles available for quick set up. The settings for these can be a djus ted. New customized
profiles can also be created. Each profile has a descriptive name, indicating its purpose.
•Thestreamprofiles can be accessed from the Stream profile drop-down l ist in the Live View page.
• To add, copy, modify, and remove stream profiles go to Video > Stream Profiles.
• To select the default stream pr ofile go to Live View Config > Stream Profile and choose the profile fro m the drop-down list.
For more information see the online help
on this page.
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