Axis M1103 User Manual

Also see for M11 Network Camera Series: User manual User manual User manual Installation guide User manual

16AXIS M11 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 imagecomplexity, using up bandwidth for increased activity in the image, and less for 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. Not setting apriority means the frame rate and image quality are equally affected.Note:To determine a reasonable bit rate, go to Video > Video Stream > Image. Under Overlay Settings, check the Includetext checkbox and enter the code #b in the field. The current bit rate will display as a text overlay on the Live Viewpage.To preview 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. Defining the frame size as Defaultprovides consistently good image quality at the expense of increased bandwidth and storage usage during low light. Limitingthe frame size optimizes bandwidth and storage usage, but may give poor image quality. To prevent increased bandwidth andstorage usage, the maximum frame size should be set to an optimal value.Note:The maximum frame size allowed increases compression in order to maintain a low frame size starting at the com-pression value set under Video > Video Stream > Image. When compression is 100, the image cannot be madesmaller. You may also need to adjust the resolution if a smaller frame size is needed.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 usage and/or purpose. The profiles can be accessedfrom the Live View page.• To create a new stream profile, click Add to bring up the Stream Profile Settings dialog.1. Enter a unique name and a description for your profile.2. Select a Video encoding (H.264 or MJPEG) from the drop-down list.3. Modify the stream settings under the Image, H.264 and MJPEG tabs. See Video Stream, on page 15.4. Click OK to save the profile• To copy an existing stream profile, click Copy and enter a new name. Change the stream profile settings as above.• To modify an existing stream profile, click Modify and change the settings as above. The original settings for thepre-programmed profiles can always be restored by clicking Restore.• To remove a stream profile, click Remove. Pre-programmed profiles cannot be removed.