Part III Understanding Visual Basic for Applications in Java

Paint pdf417 2d barcode in Java Part III Understanding Visual Basic for Applications

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The cornerstone of an explanation of how PCM works is the Nyquist sampling theorem (Ref. 2), which states:

Back when the VCR ruled the personal video recorder device market, you could schedule recording jobs for a specific time slot and the recorder set an alarm clock to wake itself up at the specified time. The challenge was figuring out a non-intuitive interface and deciphering a crudely translated user manual if you bothered to read it at all. In the same vein, MythTV can intentionally be put to sleep to awaken at the next scheduled recording job, but in an extraordinarily simple and scalable way. The scheduler agent on the MBE server maintains a watch over all other media devices present on the network. During routine status checks that report back periods of inactivity to the MBE, that same scheduler agent begins a graceful shutdown process for all inactive systems. First it sets its alarm clock for the next scheduled recording, and then it notifies participant SBE servers to shutdown before shutting down itself. Most of the settings that follow are beneficial largely in multi-machine networks and help their timely interoperation. While a single-box configuration benefits from default settings in small ways, these features illustrate the scalability of MythTV for multiple-box systems. Table 6-7 summarizes features you find in this General Settings subcategory.

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The Services menu is an odd but valuable feature that appears as a submenu in the application menu (Figure 19-1). The Services menu provides a way to make some of your application s features available directly to users of other applications without requiring them to run your app directly. Items in the Services menu are officially called standard services by Apple, but are more commonly known as system services. To use a service, you generally select something in the current application, and then pull down the application menu, navigate to the Services submenu, and pick the service you want. For example, when you install the Camino Web browser, Camino adds the Open URL In Camino item to the Services menu. So, when you re running another application, such as Microsoft Word or Preview, and you want to open a URL from some of its text, you can select the text and choose Open URL In Camino from the Services menu. Mac OS X finds the necessary code in the other application Camino, in this case passes the data to it from the current application, and the service does its thing. When you install an application, the system finds any services that application provides so that they can be added to the Services menu.

MythVideo is generally a simple and straightforward component. From within MythTV, choose Utilities/Setup Media Settings Video Settings General Settings. From this screen, you point MythVideo to the folders where your collection of videos is stored, or accept the default and begin building your library from scratch.

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