Axis Communications P1427E user manual Stream Profiles, 264

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AXIS P1427–E Network Camera

Video

Overlay settings. See Overlay on page 21. 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 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 may also have an adverse affect on image quality.

The Axis product supports two H.264 profiles. The Main profile provides higher compression than the Baseline profile with the same video quality, 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 33.

When setting up continuous recording. See Continuous Recording on page 38.

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

For quick setup, use one of the predefined stream profiles. Each predefined profile has a descriptive name, indicating its purpose. If required, the predefined stream profiles can be modified and new customized stream profiles can be created.

To create a new profile or modify an existing profile, go to Setup > Video > Stream Profiles.

To select a default stream profile for the Live View page, go to Setup > Live View Config .

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Contents Axis P1427-E Network Camera Legal Considerations About this DocumentLiability Intellectual Property RightsLearn More SupportAxis P1427-E Network Camera Table of ContentsPerformance Considerations Network Connector Connectors and ButtonsConnector Hardware OverviewSD Card Slot LED IndicatorsControl Button Color IndicationAccess from a Browser Accessing the ProductAccess from the Internet Set the Root PasswordSet Power Line Frequency Configure Capture ModeLive View Controls on the Live ViewManual Trigger Go to Setup EventsAxis Media Control viewer toolbar PTZ Controls Axis Media Control AMC How to Stream H.264Media Streams Alternative Methods of Accessing the Video Stream Axis P1427-E Network Camera Basic Setup Setting Up the ProductVideo Stream VideoPixel Counter Image264 Stream ProfilesCapture Mode Camera SettingsGo to Setup Video Camera Settings Image AppearanceWhite Balance Exposure SettingsWide Dynamic Range Shutter & GainSelect an Aspect ratio and a Video stream resolution Iris adjustmentView Area Day/NightOverlay Image OverlayGo to Video Video Stream and select the Image tab Go to Video Overlay ImageGo to Events Action Rules Using Overlay Text in an Action RuleGo to Video Focus & Zoom Privacy MaskFocus & Zoom Default Viewer for Browsers Live View ConfigViewer Settings Browser Viewer DescriptionOutput Buttons Go to Setup Live View ConfigUser Defined Links Go to PTZ Preset Positions Preset PositionsPTZ Pan Tilt Zoom Guard TourControls AdvancedControl Queue Camera Tampering DetectorsMotion Detection Go to Detectors Camera TamperingMotion Detection Parameters Set Up Motion Detection WindowsAxis P1427-E Network Camera Go to Setup Applications Install ApplicationApplications Application LicensesAxis P1427-E Network Camera Events Time Setting Up an Action RulePTZ Control Go to Events Action Rules and click AddFallback Action RecipientsRecipient Use with action Go to Events Recipients and click AddSchedules Setting Up an Email RecipientRecurrences Go to Events Schedules and click AddAxis P1427-E Network Camera Recording List RecordingsContinuous Recording Go to Recordings ListLanguages Security System OptionsUsers IP Address FilterGo to System Options Security Ieee IeeeCertificates Go to Setup System Options Security Certificates Basic TCP/IP SettingsDate & Time NetworkIPv6 Address Configuration IPv4 Address ConfigurationAssign IP Address Using ARP/Ping ARP/PingAxis Internet Dynamic DNS Service Advanced TCP/IP SettingsDNS Configuration Axis Video Hosting System AvhsHost Name Configuration NTP ConfigurationLink-Local IPv4 Address NAT traversal port mapping for IPv4FTP QoS Quality of ServiceUPnPTM StorageRTP/H.264 BonjourGo to System Options Storage Click Network Share Network ShareGo to System Options Storage and click SD Card Support MaintenancePorts & Devices Logs & Reports System OverviewScripting File UploadPlain Config Reset to Factory Default SettingsEmergency Recovery Procedure TroubleshootingChecking the Firmware Upgrading the FirmwareProblems setting the IP address Symptoms, Possible Causes and Remedial ActionsProduct cannot be accessed from a browser Product is accessible locally but not externallyVideo and image problems, general Problems with streaming H.264Video Camera Settings Key framesStorage disruption Storage and disk management problemsTechnical Specifications Power Function/group Specifications System ApplicationConnectors DimensionsConnectors Performance Considerations M1.6