No-Video Test Pattern, Buffers Requested

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Osprey 240e/450e User Guide

Click Apply to apply the settings.

Click Help to access the user guide.

No-Video Test Pattern

You can select one of four patterns to appear when no video signal is present – 75% color bars, 100% color bars, blue, and black.

You can place a text line on the test pattern. If the Text edit box is empty - no spaces and no text characters – then no text will exist. Otherwise, whatever you type here, up to 32 characters, displays on the test pattern.

Click Show board ID info to display the board serial number.

Buffers Requested

The driver can tell DirectShow the minimum number of video capture buffers it needs to have allocated for proper operation (Figure 34). The client application may ask for a different number of buffers; in general DirectShow honors the larger of the requests.

Figure 34. Number of Capture Buffers Requested

Buffers are used in a round-robin style. The driver fills a buffer; the client then consumes the buffer, and releases it when it is done. The buffer then circulates to the driver to be filled with video again. If the client holds on to a large number of buffers at once, there may be no empty buffers available to the driver and frames may be dropped. The solution is to allocate a larger number of buffers.

Capture and encoding applications generally need a large number of buffers so they can deeply pipeline the downstream processing without danger of buffer starvation at the driver. If buffer starvation is evident, in the form of dropped frames, you can try increasing the number of buffers allocated for the Capture pin.

Preview video that is directly rendered on the screen does not use deep pipelining and cannot benefit from it. There has been some evidence that too many buffers for direct rendering can harm performance.

In that case, on the Capture pin, increase the number of buffers from the default 100 for deeper pipelining and more resistance to dropped frames.

On the Capture pin, you can reduce the number of buffers to around 5 if the video is going to be used only for direct rendering. Remember to put the number back to 100 or more for capture or encoding – 5 may not be enough and may result in many dropped frames.

On the Preview pin, you can increase the number of buffers to 20 or more if you are using it for capture or encoding rather than direct rendering.

ViewCast

Osprey-450e, Osprey-240e specifications

The ViewCast Osprey series, particularly the Osprey-240e and Osprey-450e, represents a significant advancement in the field of video capture and encoding technology. These high-performance video capture cards are designed to meet the growing demands of professional broadcast environments, video production, and live streaming applications.

The Osprey-240e offers a compact design while delivering excellent performance. It is equipped with dual channel input capabilities, allowing users to capture multiple streams simultaneously. This feature is particularly beneficial for broadcasters and content creators looking to streamline their workflows. The Osprey-240e supports a variety of input formats including SDI and HDMI, ensuring compatibility with a wide range of video sources. Its robust encoding capabilities allow for real-time video streaming in HD resolution, making it suitable for live events, webinars, and other digital content delivery applications.

On the other hand, the Osprey-450e takes video capture to the next level with enhanced capabilities. It supports up to four channels of video input, making it an ideal solution for multi-camera setups. The Osprey-450e also boasts advanced encoding technologies that facilitate high-quality video compression without sacrificing performance. This model is particularly well-suited for enterprise-level applications where high-definition video quality is paramount. Users can experience lower latency and improved encoding efficiency, resulting in smoother viewing experiences for end-users.

Both models feature powerful drivers and software support that integrate seamlessly with a variety of video production and streaming applications. The Osprey series is designed with user-friendly interfaces, making it accessible for both seasoned professionals and newcomers alike. The cards are also compatible with many of the industry-standard software solutions, enabling users to harness the full potential of their video content.

These capture cards also prioritize reliability and durability, ensuring long operational life even under demanding conditions. Their efficient thermal management systems keep components cool during extended use, thereby enhancing performance consistency.

In summary, the ViewCast Osprey-240e and Osprey-450e deliver impressive features tailored for a range of video applications. Their support for multiple input channels, advanced encoding technologies, and strong software compatibility make them invaluable tools in the modern digital media landscape, solidifying their reputation among content creators and broadcasters alike.