Axis P8513 User Manual

Also see for P8513: Installation guide User manual

10AXIS P85 Series - VideoH.264GOV SettingsThe GOV structure describes the composition of the video stream and setting the GOV-length to a higher value savesconsiderably on bandwidth but may have an adverse effect on image quality.Bit Rate ControlThe bit rate can be set as Variable Bit Rate (VBR) or Constant Bit Rate (CBR).VBR adjusts the bit rate according to the image complexity, using more bandwidth for increased activity in the image, and lessfor lower activity in the monitored area.CBR allows you to set a fixed Target bit rate that consumes a predictable amount of bandwidth. As the bit rate would usuallyneed to increase for increased image activity, but in this case cannot, the frame rate and image quality are affectednegatively. To partly compensate for this, it is possible to prioritize either the frame rate or the image quality whenever the bitrate needs to be increased. Not setting a priority means the frame rate and image quality are equally affected.Note: To determine a reasonable bit rate, go to Setup > Video > Video Stream > Image, check the Include text checkboxand enter the code #b in the Include text: field. The current bit rate is displayed as a text overlay on the Live View page.To view the image stream while configuring the GOV settings and Bit rate control, select Open... under Preview.MJPEGSometimes the image size is large due to low light or complex scenery. Adjusting the Maximum frame size helps to controlthe bandwidth and storage used by the Motion JPEG video stream in these situations. An Unlimited frame size providesconsistently good image quality at the expense of increased bandwidth and storage usage during low light. Limiting the framesize optimizes bandwidth and storage usage, but may give poor image quality. To prevent increased bandwidth and storageusage, the maximum frame size should be set to an optimal value.See Preview, on page 9.Stream ProfilesThere are four pre-programmed stream profiles available for quick set-up. These settings can be adjusted and new customizedprofiles can be created. Each profile has a descriptive name, describing its use and purpose. The profiles can be accessed fromthe Live View page.• To add a new stream profile, click Add to bring up the Stream Profile Settings dialog.• Enter a descriptive name for your profile.• Choose the form of Video encoding you wish to use from the drop-down list:H.264 - Also known as MPEG-4 Part 10. This is the new generation compression standard for digital video. Thisfunction offers higher video resolution than Motion JPEG at the same bit rate and bandwidth, or the same qualityvideo at a lower bit rate.Motion JPEG - Delivers a high quality video stream, from which individual images can be extracted and saved.• Copy an existing stream profile to your system and rename the copy• Modify an existing stream profile based on the light situation and motion to be captured by your camera.• Highlight the stream profile (custom created profiles only) you wish to remove, then click Remove to remove it fromthe list.