532 Part IV . Running Applications communicate with (Web site construction)
532 Part IV . Running Applications communicate with people using other popular videoconferencing clients, such as Microsoft NetMeeting, Cu-SeeMe, and Intel VideoPhone. GnomeMeeting does not support the NetMeeting shared whiteboard functions, just videoconferencing. To be able to send video, you need a Webcam 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 GnomeMeeting for videoconferencing. Getting a Supported Webcam As with support for TV capture cards, Webcam support is provided through the video4linux interface. To see if your Webcam is supported, check the /usr/src/ linux*/Documentation directory. A few parallel-port video cameras are described in the video4linux subdirectory; however, the bulk of the supported cameras are listed in the usb directory. After doing some research, I purchased a Logitech QuickCam Pro 3000. The driver for this Webcam was made for a Philips USB Webcam, but it also works for Webcams from Logitech, Samsung, Creative Labs, and Askey. Before making the purchase, I checked out the driver s description at www.saillard.org/linux/pwc. Supported USB cameras should be autodetected, so that when you plug them in, the necessary modules are loaded automatically. Just start up GnomeMeeting (gnomemeeting command), and you should see video from your Webcam on your Linux desktop. You can check to see that your Webcam is working properly by typing the following: # lsmod pwc 43392 1 videodev 5120 2 [pwc] usbcore 59072 1 [audio pwc usb-uhci] The output from lsmod shows that the pwc driver is loaded and associated with the videodev module and usbcore module. Opening Your Firewall for GnomeMeeting You need to open a variety of ports in your firewall to use GnomeMeeting. In particular, you need to open TCP port 1720 and TCP port range 30000 to 30010. For UDP ports, you must open ports 5000 through 5007 and ports 5010 through 5013. Examples of exact iptables settings you can use to open these ports are contained in the GnomeMeeting FAQ (www.gnomemeeting.org/faq). Tip Note
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