AXIS P3904–R Network Camera

Video

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 31.

•When setting up continuous recording. See Continuous Recording on page 35.

•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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Axis Communications P3904-R user manual Stream Profiles, 264, Click Save to apply the new settings
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P3904-R specifications

Axis Communications P3904-R is a state-of-the-art network camera, specifically designed for mobile surveillance applications. It is an ideal solution for users who require high-quality video monitoring in challenging environments, such as public transport, police vehicles, and emergency services. This device exemplifies Axis’s commitment to delivering cutting-edge technology wrapped in a robust and durable design.

One of the standout features of the P3904-R is its high-resolution imaging capabilities. The camera delivers sharp 1080p video at 30 frames per second, ensuring that even fast-moving scenes are captured with clarity and detail. This is particularly crucial for applications where identifying faces or license plates is necessary. Coupled with Axis’s WDR (Wide Dynamic Range) technology, the camera performs exceptionally well in varied lighting conditions, providing clear footage even in situations where light may be uneven.

The P3904-R also boasts a compact and rugged design, built to withstand the rigors of mobile use. It is rated IP66 and IK10, making it resistant to harsh weather conditions and vandalism. This durability ensures that the camera remains operational in diverse environments, from urban streets to remote areas.

Another significant technology employed in the P3904-R is the integration of PoE (Power over Ethernet). This allows for seamless installation by powering the device through the network cable, eliminating the need for separate power supplies. The camera also supports H.264 and Motion JPEG compression formats, enabling efficient storage management and optimized bandwidth usage.

Furthermore, the P3904-R is equipped with multiple analytics capabilities. These features enhance security by enabling intelligent event detection, such as motion detection and tampering alarms. This intelligent analytics functionality improves the relevance of recorded footage, making it easier to locate significant events during review.

The camera includes audio support, further enriching its functionality. The two-way audio capability allows users to communicate through the camera, adding an extra layer of interaction and security, especially beneficial in emergency situations.

In conclusion, the Axis Communications P3904-R is a well-engineered camera offering high-definition performance, rugged reliability, and advanced features that meet the challenges of mobile surveillance. Whether used in public transportation, emergency services, or any demanding environment, it delivers exceptional video quality and operational efficiency. Its combination of durable design, sophisticated technology, and user-friendly features makes it a top choice for users seeking a reliable mobile surveillance solution.
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