Axis Communications Q1765-LE PT user manual Stream Profiles, 264

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AXIS Q1765–LE PT Mount Network Camera

Video

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 profiles:

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

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 31.

When setting up continuous recording. See Continuous Recording on page 34.

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 Q1765-LE PT Mount Network Camera About this document Legal ConsiderationsLiability Intellectual Property RightsSupport Learn MoreTable of Contents Axis Q1765-LE PT Mount Network CameraConnectors and Buttons Network ConnectorFor technical specifications, see RJ45 Ethernet connector with Power over Ethernet PoELED Indicators Power ConnectorRS485/RS422 Connector SD Card SlotAccess the Product Access from a BrowserAccess from the Internet Set the Root PasswordSet Power Line Frequency PTZ ModeConfigure Capture Mode Live ViewGo to Setup Events Controls on the Live ViewAxis Media Control viewer toolbar Manual TriggerPTZ Controls Media Streams How to Stream H.264Axis Media Control AMC Alternative Methods of Accessing the Video Stream QuickTimeTM. The following paths can be usedAxis Q1765-LE PT Mount Network Camera Set Up the Product Basic SetupClick Save to apply the new settings VideoVideo Stream Pixel CounterStream Profiles 264Camera Settings Capture ModeGo to Setup Video Camera Settings Image AppearanceExposure Settings White BalanceWide Dynamic Range Shutter & GainDate/Time Formats in the online help To enable overlays OverlayBuilt-in IR Illuminations LEDs Day/NightOverlay Image Go to Video Overlay ImageUse Overlay Text in an Action Rule Privacy MaskGo to Events Action Rules Configure the Live View Default Viewer for BrowsersViewer Settings Browser Viewer DescriptionUser Defined Links PTZ Pan Tilt Zoom Preset PositionsGuard Tour Install PTZ Driver Device SettingsAdvanced Control QueueAxis Q1765-LE PT Mount Network Camera Set Up Motion Detection Windows DetectorsShock Detection Motion DetectionDefault values Parameter Object Size History Sensitivity DescriptionHigh level 100% Medium level 50%Install Application Go to Setup ApplicationsApplications Application LicensesAxis Q1765-LE PT Mount Network Camera Set Up Action Rules EventsAdd Recipients Go to Events Action Rules and click AddSet Up Recurrences Set Up Email RecipientsCreate Schedules Go to Events Schedules and click AddAxis Q1765-LE PT Mount Network Camera Recordings Recording ListContinuous Recording Go to Recordings ListLanguages To log in again and be configured to use this functionality System OptionsSecurity UsersGo to Setup System Options Security Certificates IeeeCertificates Go to System Options Security IeeeBasic TCP/IP Settings Click Install certificate and upload the certificateIPv4 Address Configuration Date & TimeIPv6 Address Configuration Assign IP Address Using ARP/PingARP/Ping Linux/Unix syntaxAdvanced TCP/IP Settings Link-Local IPv4 Address Select Use the host name to set the host name manuallyGo to System Options Security Https QoS Quality of Service Smtp emailUPnPTM can be disabled under System Options Network UPnPTM UPnPTMRTP/H.264 BonjourStorage SD CardNetwork Share To add a network shareMaintenance Ports & DevicesCOM Port Port StatusSupport Support OverviewSystem Overview Logs & ReportsPlain Config Reset to Factory Default SettingsFile Upload Troubleshooting Upgrade the FirmwareEmergency Recovery Procedure Check the FirmwareSymptoms, Possible Causes and Remedial Actions Problems setting the IP addressProduct cannot be accessed from a browser Product is accessible locally but not externallyProblems with streaming H.264 Video and image problems, generalVideo Camera Settings Key framesStorage and disk management problems Storage disruptionRe-mount the storage device Reformat the SD card and then click MountTechnical Specifications Connectors RS485/422 Connector RX pair for all modes combined RX/TX for 2-wire RS485Performance Considerations Function PinM1.8