The only additional limitation on the Extender is that non-silent license acquisition, in which the user must navigate to a separate page to acquire the license, is not supported. If you have DRM-protected content, you should work with your license issuer to set up a process to issue your licenses silently. If you create your playlists to include ignored elements, the files specified in your REF elements should still play in order, but you might lose some functionality.
Once you have determined that the user is accessing your application from an Extender, you can programmatically make adjustments to address the issues described in this section. As you review these issues, keep in mind that most developers will want to avoid creating large amounts of separate code to accommodate Extender devices. Because third-party Extenders have a smaller set of display capabilities than the Xbox or the Windows Media Center PC, the best strategy is to treat the third-party Extender user as your target audience and complete this experience before adding extra features for other platforms.
Some applications depend on a setup program such as a download manager, an ActiveX control, or a readme file to install items onto a user's computer. Users cannot install software from the Extender because installation requires administrative user rights. The CreateDesktopShortcut method is designed to accomplish this transition smoothly.
You can call this method from script, passing in the URL for your setup file or ActiveX control installation page as an argument. Be sure to install the application for All Users so that the user can return to the Extender and access it.
For security reasons, the Extender does not allow your application to have any user interface appear outside of Windows Media Center. If your application attempts to invoke a UI element outside of Windows Media Center, the Extender will automatically close the session. Test carefully to ensure this does not happen. Animations are commonly used in Windows Media Center applications to enrich the user experience and to make the user interface more intuitive to use.
Depending on the type of application, animations may need to be adjusted to accommodate the different rendering capabilities of Extender devices. This applies only to animations, not to video content played using Windows Media Center's PlayMedia method. Supported video files will play correctly on the PC and any Extenders. Most animations in XBAP or hosted HTML applications are rasterized converted from vector images to bitmaps on the PC and sent frame-by-frame as a series of bitmap images to the remote Extender device for display.
This process is optimized so that simpler animations involving fewer pixels will be displayed at a suitably high frame rate. However, larger, more complicated animations will be displayed at a lower frame rate as low as two or three frames per second with less consistency, more dropped frames, and poor audio synching.
For these animations you should test their performance carefully on Xbox and third-party Extender devices. In many cases it may be necessary to detect the Extender session and disable or simplify the animation for the Extender user.
Animations in Windows Media Center Presentation Layer applications are treated differently in an Extender session depending on the type of Extender device. On an Xbox , the animations are not rasterized on the PC before they are sent to the Extender; instead, the Xbox 's powerful DirectX capabilities are used to render the animations on the Extender itself, with a fidelity and performance that are equal to or better than the experience on the host PC.
Third-party Extenders do not have the on-board capability to render Windows Media Center Presentation Layer animations. To avoid the performance issues associated with trying to send Windows Media Center Presentation Layer animations frame-by-frame to the Extender, Windows Media Center Presentation Layer animations are disabled on third-party Extenders. That means that a given animation will display the first frame before it starts, and then simply jump to the last frame, skipping all of the frames in between, and display that last frame statically.
While you can and should instill your Windows Media Center Presentation Layer application with rich animations to enrich the experience for PC and Xbox users, it is important to test each animated element on a third-party Extender and ensure that it degrades gracefully. In some cases, as when an animation is played in a loop, the last frame may not be suitable for static display, so a revision might be necessary.
The table below summarizes the animation capabilities of Windows Media Center devices for the three available types of Extensibility applications.
Limited fidelity means the low frame rate and lack of audio synching described above. Third-party Extenders, however, use a separate type of display mechanism that does not have the 3D rendering capabilities to display elements rotated on the X or Y axes. In effect, it will correctly display your Z-axis rotation for an element but it will ignore your specification for the X-axis and Y-axis rotations, as if they were set to zero. This applies only to third-party Extenders.
The display will be correct on the Xbox If your application uses X-axis or Y-axis rotations for elements, you should carefully check the display for each element on a third-party Extender to ensure that the display degrades gracefully.
This applies especially to animations that rotate elements in three dimensions. Because animations on third-party Extenders jump to the last key frame, be sure that that frame imparts the correct information to the user. For elements that are not displayed in a user-friendly way due to this limitation, consider the following options for correcting the problem without having to create separate code for third-party Extenders:.
For a static not animated element, you may be able to substitute an image of the element that simulates the correct rotation. In cases where linear perspective is not important, you may be able to adequately simulate 3D rotation by using a scaling effect. For animated elements, the display problems are likely to occur in the rotation of the last key frame.
This can be corrected by designing the animation so that the last frame returns to a non-rotated state. This distortion is most noticeable where a custom viewport the custom frame for displaying media content is used—the viewport will appear out of position relative to the other elements on the page. It is possible to watch and pause live TV with support for up to four TV tuners or two dual-tuner cards a maximum of two tuners outside of the United States. These standards are unencrypted broadcast television.
It is possible to view encrypted private network television stations that are not broadcast over the air with internal and external tuner options that support the insertion of a CableCard provided by the Cable TV company.
Windows Media Center has since been discontinued as of Windows The user interface was redesigned and tailored for the aspect ratio. Support for multiple tuners was added in later releases and varies depending upon the version of the operating system purchased.
Also introduced to U. It is not available as an update for existing Windows Vista Media Center users. Much of the functionality added with TV Pack was included with the version of Media Center included in Windows 7 , along with an update to the user interface.
Media Center uses TV tuner devices to play back and record TV shows from standard antenna, cable or satellite signals. Users can record television programs manually or schedule recording via the electronic program guide.
Recordings can be burned to Video DVD or, barring copy restrictions, be transferred to a portable media player. All the tuners use the same guide data but it can be edited and configured to include additional channels such as Clear QAM not found or included in most Titan Guides.
While watching live television, the program keeps a buffer that allows users to rewind or pause live TV, allowing users to skip commercials. A third party program MCEbuddy allows automatic commercial skipping on recorded programs.
Media Center can stream live and pre-recorded television to Windows Media Center Extenders such as the Xbox console, but other Windows computers can just access recorded, not live content. Playback of content on television is possible through Media Center Extenders or by directly connecting a computer running Windows Media Center to a television. The menus of Windows Media Center are displayed in a foot user interface suitable for viewing on large screen televisions and can be navigated using various remote controls.
Windows Media Center PCs require a sensor to be able to interact with the remote control. The sensor must have Windows Plug and Play device drivers. To advertise Media Center support, remote controls must also have certain buttons such as the Green Media Center logo Start button and buttons for navigation, playback and volume controls, power and channel flipping.
Windows Media Center organizes and displays videos and music found on both local and networked computers. Music albums are arranged with accompanying album art that can be downloaded off the Internet automatically or added manually into Media Center. Users can create playlists of different songs or albums as well.
While playing music, the user can pause and fast forward songs and view visualizations. Analog FM radio support is also available if the user's TV tuner supports it. Media Center allows users to browse pictures and play them in slideshows, as well as play video files.
Media can be categorized by name, date, tags, and other file attributes. This section describes these basic concepts for developing Windows Media Center applications and services in the following topics.
Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. In this article. Describes the features and limitations of Windows Media Center web applications, and how to navigate to other pages.
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