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Axis Communications Q7401 user manual Image, 264, Pixel counter can be accessed from

Models: Q7401

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AXIS Q7401 Video Encoder

Video and Audio

The pixel counter can be accessed from:

•Video & Audio > Video Stream. Under Preview, click Open and select the Show pixel counter option to enable the rectangle in the image. Use the mouse to move and resize the rectangle, or enter the number of pixels in the Width and Height fields and click Apply.

•The Live View page in Internet Explorer with AXIS Media Control (AMC) in Windows. Right-click in the image and select Pixel counter. Use the mouse to move and resize the rectangle.

Image

The default image settings can be configured under Video & Audio > Video Stream. Select the Image tab.

The following settings are available:

•Resolution. Select the default resolution.

•Select Aspect ratio correction to improve the appearance of images in the browser when the video stream has a different aspect ratio. Pixels comprising the image are rearranged so as to provide a more accurate representation of the image.

•Compression. The compression level affects the image quality, bandwidth and file size of saved images; the lower the compression, the higher the image quality with higher bandwidth requirements and larger file sizes.

•Mirror image. If required, the image can be mirrored.

•Rotate image. If required, the image can be rotated.

•Color setting. Select either Color or Black & White. Black & White uses less bandwidth than Color.

•Maximum frame rate. To avoid bandwidth problems, the frame rate allowed to each viewer can be Limited to a fixed amount. Alternatively, the frame rate can be set as Unlimited, which means the Axis product always delivers the highest frame rate possible under the current conditions.

•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 H.264 stream settings can be configured from the Video & Audio > 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):

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.

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Axis Communications Q7401 user manual Image, 264, Pixel counter can be accessed from, Click Save to apply the new settings
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Q7401 specifications

The Axis Communications Q7401 is a powerful and versatile video encoder designed for transforming analog video signals into high-quality digital streams. This device is part of Axis' comprehensive line of video surveillance solutions, catering to a broad array of applications ranging from retail and transportation to public safety and critical infrastructure monitoring.

One of the standout features of the Q7401 is its support for multiple video formats, including H.264 and Motion JPEG. This versatile encoding capability ensures that users can choose the video quality and bandwidth that best suit their needs. The H.264 compression, in particular, provides a significant reduction in bandwidth and storage requirements while maintaining exceptional video quality, making it an ideal choice for environments where efficiency is crucial.

Equipped with a two-way audio feature, the Q7401 enables real-time communication between the camera and the control center, enhancing situational awareness and response capabilities. This feature is increasingly valuable in security applications, allowing operators to interact proactively with on-site personnel or potential intruders.

The Q7401 also includes advanced features such as video motion detection, which allows the user to set up alerts based on detected motion within predefined areas. This capability reduces the need for constant monitoring, automatically notifying users of potential security breaches or events of interest.

In terms of connectivity, the Axis Q7401 is designed to integrate seamlessly with Axis' network video products. Its compatibility with various Axis applications enhances its functionality, allowing for advanced analytics and intelligent features that can further enhance security measures.

The robust design of the Q7401 ensures reliability in various environments. Its compact form factor allows for easy installation in space-constrained locations, and it operates efficiently in temperature variations, making it suitable for both indoor and outdoor use.

Additionally, the device supports Power over Ethernet (PoE), simplifying the installation process by allowing both power and data transmission through a single cable, thus reducing the amount of wiring required.

Overall, the Axis Communications Q7401 is an excellent choice for organizations looking to upgrade their surveillance systems to meet modern security demands while benefiting from advanced features and reliable performance.