486Part IVRunning ApplicationsWatching TV with TvtimeThe tvtime program (Adelphia web hosting)
486Part IVRunning ApplicationsWatching TV with TvtimeThe tvtime program (tvtimecommand) enables you to display video output television channels, in particular on your desktop. You can change the channels, adjust volume, and fine-tune your picture. In addition, tvtime sports a slick onscreendisplay and support for a widescreen display. Tvtime will not display output from some low-quality Webcams. To use yourWebcam, consider obtaining the xawtv package, which is available for most Linuxdistributions. The following sections describe how to choose a TV capture card and use tvtime towatch television on your desktop. Getting a Supported TV CardVideo4Linux (V4l/V4l2) is the video interface available for Linux. It supports a vari- ety of TV capture cards and cameras, and is included in some distributions. If yourdistribution does not include V4l or V4L2, you can install it on your own, althoughitis not the easiest task to accomplish. For more information about obtaining andinstalling V4l and the appropriate driver, visit http://linux.bytesex.org/v4l2/ index.html. To see a list of supported TV cards that you can use with tvtime, refer to theCARDLISTand Cardsfiles of your V4l installation. To view these files, you need tohave the kernel-source package installed. You ll find the Cardsfile in /usr/src/ linux*/Documentation/video4linux/bttv/Cardson your Linux system. TheCardsfile applies to the Video4Linux bttv driver. In addition, look at all files startingwith CARDLISTin /usr/src/linux*/Documentation/video4linux/CARDLIST*. Video4Linux is designed to autodetect your TV capture card and load the propermodules to activate it. Install the TV-card hardware (with the appropriate connec- tion to your TV reception), boot Linux, and run the tvtimecommand as describedin the next section. You should see video displayed on your tvtime window. If your card doesn t appear to be working, here are a few things you can try: .Check that your TV card was properly seated in its slot and detected byLinux, by typing: $ /sbin/lspciThis shows you a list of all valid PCI cards on your computer. If your carddoesn t show up, you probably have a hardware problem. Note27_
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