Axis Communications M3027PVE user manual Stream Profiles, 264

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AXIS M3027–PVE Fixed Dome Network Camera

Video

Double Panorama

Quad View

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 complete image whereas P-frames only contain the differences from previous frames.

The H.264 stream settings can be configured from the Video > Video Stream page. Select the H.264 tab. The settings defined in this page will apply to all H.264 streams that do not use a stream profile.

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.

The Axis product supports the following H.264 profile(s):

Baseline. The Baseline profile is recommended for clients that don’t support CABAC entropy coding.

Main. The Main profile provides higher compression with maintained video quality compared to the Baseline profile but requires more processing power to decode.

The 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 up more bandwidth for increased activity in the image, and less for lower image activity. When the activity in the scene increases, the bit rate would usually increase as well. If there is a surplus in bandwidth, this may not be an issue and selecting Variable bit rate (VBR) will be sufficient. But if bandwidth is limited, it is recommended to control the bit rate by selecting Constant bit rate (CBR). When the activity in the scene increases, VBR adjusts the bit rate according to the complexity, using up more bandwidth for increased activity in the scene, and less for lower scene activity. CBR allows you to set a target bit rate that limits the bandwidth consumption.

The CBR target bit rate works like the ceiling of a tent. It limits the bit rate, while maintaining some flexibility . The bit rate may bounce up and down within the set target but when it nears the set target value, the limitation kicks in. However, because CBR will always prioritize a continuous video stream, it allows temporary overshoots from the target bit rate. Because setting a target value prevents the bit rate from increasing, frame rate and image quality are affected negatively. To partly compensate for this, select which variable shall be prioritized, frame rate or image quality. Not setting a priority means that frame rate and image quality are equally affected.

The current bit rate can be set to appear as text overlay. Under Overlay Settings, select Include text and enter the modifier #b in the field.

To apply the settings, click Save.

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 storage usage, but may give poor image quality. To prevent increased bandwidth and storage usage, the maximum frame size should be set to an optimal value.

Stream Profiles

A stream profile is a set of predefined 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 38.

When setting up continuous recording. See Continuous Recording on page 43.

In the Live View page – select the stream profile from the Stream profile drop-down list.

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Contents Axis M3027-PVE Fixed Dome Network Camera Liability About this DocumentLegal Considerations Intellectual Property RightsSupport Learn MoreTable of Contents Axis M3027-PVE Fixed Dome Network CameraPerformance Considerations Network Connector Connectors and ButtonsHardware Overview SD Card Slot LED IndicatorsConnector Control ButtonAxis M3027-PVE Fixed Dome Network Camera Access from a Browser Access the ProductAccess from the Internet Camera Orientation Set the Root PasswordSet Power Line Frequency Click Use HttpsControls on the Live View Go to Setup EventsLive View Manual TriggerAxis Media Control viewer toolbar PTZ ControlsAxis M3027-PVE Fixed Dome Network Camera Media Streams How to Stream H.264Axis Media Control AMC Alternative Methods of Accessing the Video Stream Axis M3027-PVE Fixed Dome Network Camera Set Up the Product Basic SetupPixel Counter VideoVideo Stream View modesPanorama OverviewDouble Panorama Quad View Direction ImageView areas Stream Profiles 264Image Appearance Camera SettingsExposure Settings White BalanceSet Shutter to View areasShutter & Gain Day/NightGo to Video Video Stream and select the Image tab OverlayOverlay Image Go to Video Overlay ImageUse Overlay Text in an Action Rule Go to Events Action RulesPrivacy Mask Viewer Settings Configure the Live ViewDefault Viewer for Browsers Browser Viewer DescriptionUser Defined Links Go to Setup Live View ConfigOutput Buttons PTZ Pan Tilt Zoom Preset PositionsGuard Tour Controls AdvancedControl Queue Go to PTZ Guard Tour and click AddOperator Same as administrator but with lower priority Motion Detection DetectorsCamera Tampering Go to Detectors Camera TamperingSet Up Motion Detection Windows Motion Detection ParametersAxis M3027-PVE Fixed Dome Network Camera Applications Install ApplicationGo to Setup Applications Application LicensesAxis M3027-PVE Fixed Dome Network Camera Convert Event Types to Action Rules Set Up Action RulesEvents Go to Events Action Rules and click AddTriggers Actions Add RecipientsRecipient Types Create Schedules Set Up Email RecipientsGo to Events Schedules and click Add Set Up Recurrences Go to Events Recurrences and click AddContinuous Recording RecordingsRecording List Go to Recordings ListClick Save to save and start the recording Languages Users System OptionsSecurity IP Address FilterCertificates IeeeGo to System Options Security Ieee Date & Time Basic TCP/IP SettingsGo to Setup System Options Security Certificates NetworkAssign IP Address Using ARP/Ping IPv4 Address ConfigurationIPv6 Address Configuration ARP/PingDNS Configuration Advanced TCP/IP SettingsAxis Internet Dynamic DNS Service Axis Video Hosting System AvhsLink-Local IPv4 Address NTP ConfigurationHost Name Configuration NAT traversal port mapping for IPv4QoS Quality of Service FTPRTP/H.264 StorageUPnPTM BonjourMount and Unmount SD Card Format SD CardNetwork Share MaintenancePorts & Devices PortsSystem Overview SupportSupport Overview Logs & ReportsScripting Reset to Factory Default SettingsPlain Config File UploadEmergency Recovery Procedure TroubleshootingUpgrade the Firmware Check the FirmwareProduct cannot be accessed from a browser Symptoms, Possible Causes and Remedial ActionsProblems setting the IP address Product is accessible locally but not externallyVideo Camera Settings Problems with streaming H.264Video and image problems, general Key framesStorage and disk management problems Storage disruptionTechnical Specifications Power Function/group Specifications System ApplicationInstallation aids Data Streaming ConnectorsConnectors Performance Considerations M3.2