Preview Pin to VMR7, Video Mixing Renderer

AVStream Driver Reference Information

Preview Pin to VMR7

Figure 57. Video Mixing Renderer 7

VMR7 is short for Video Mixing Renderer 7. VMR7 is a newer renderer that is generally much faster than the old Video Renderer. When the driver is running in Direct Mode, VMR7 uses an efficient DirectDraw configuration to render with almost no CPU overhead, especially when YUY2 video is used. When the driver is running in PostProcessing Mode, DirectDraw is not used but it is still the fastest renderer.

Unfortunately, VMR7 is not the default video renderer in building a filtergraph – an application must explicitly ask for VMR7 in its graph for it to be used. This causes many simpler applications to render video much less efficiently than they might.

VMR7 works best with YUY2 video and there is usually little reason to use any other format. It will, however, work fairly well with the RGB format – usually RGB32 – that matches the current screen depth. We recommend letting DirectShow choose the video format. It generally makes the correct choice. In particular, on some (usually older) systems, if two video frames are to be rendered with VMR7 at the same time, only one can be YUY2; other(s) are RGB, with a conversion filter inserted into the graph if necessary.

We do not provide an RGB24 option on the preview pin for use with 24-bit screens because on at least some display adapters the rendering of RGB24 to VMR7 is incorrect.

Note: VMR7 cannot be used when closed captions are to be rendered from the driver’s DShow- standard CC or VBI pin – use the Overlay Mixer to Video Renderer pathway instead. If the driver’s internal rendering is used, the VMR7 works and is recommended.

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.