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One possible reason that you don't see any video when you try to run tvtime or other video applications is that some other person or video application already has the video driver open. Only one application can use the video driver at a time. Another quirk of Video4Linux is that the first person to open the device on your system becomes the owner. So you might need to open the permissions of the driver to allow people other than the first person to use it to access the Video4Linux driver.
Running tvtime
To start up the tvtime viewer, simply select TVtime Televison Viewer from the Sound & Video or
Multimedia menu (depending on your Linux distribution), or type the following from a Terminal
window on your desktop:
$ tvtime &
A video screen should appear in a window on the desktop. Click on the window to see a list of sta- tions. Right-click to see the onscreen Setup menu.
Here are a few things you can now do with your tvtime onscreen display:
Configure input - Change the video source, choose the television standard (which
defaults to NTSC for the U.S.), and change the resolution of the input.
Set up the picture - Adjust the brightness, contrast, color, and hue.
Adjust the video processing - Control the attempted frame rate, configure the deinterlacer, or add an input filter.
Adjust output - Control the aspect ratio (for 16:9 output, for example), apply a matte,
or set the overscan mode.
Video Conferencing with Ekiga
The Ekiga window lets you communicate with other people over a network through video, audio, and typed messages. Because Ekiga supports the H323 protocol (a standard for multimedia communications), you can use it to communicate with people using other popular videoconferencing clients, such as Microsoft NetMeeting, Cu-SeeMe, and Intel VideoPhone.
NOTE
Ekiga does not support the NetMeeting shared whiteboard functions, just
videoconferencing.
To be able to send video, you need a Webcam that is supported in Linux - you'll find a few dozen models from which to choose. The following sections show you how to set up your Webcam and use Ekiga for videoconferencing.
NOTE
Ekiga was previously known as GnomeMeeting. Both names may be in use on any given
Linux platform.
The continuation/full version of this article read on site - www.podgrid.org - Linux Bible