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10.5. Operation

Once all of the above steps have been completed and the necessary scripts have been written, the demo is ready to run. Before running the main.sh script, it is necessary to set up a proxy for the globususer ID to be able to run the Globus Toolkit commands. This can be done with the grid-proxy-init command. This command will prompt for a passphrase that was set up by the user. The DVCamera needs to be connected to the capture machine via FireWire and manually started. As soon as the video playback is started, the main.sh script should be started, which in turn starts the video capture process and all of the other conversion steps. While the process is starting, a blank CD-R disk should be loaded into the CD writer.

This assumes that all of the scripts are located in the same directory on the capture machine. This example creates four video segments, each one minute long, and sends them to each of the four sever machines for conversion. The resulting VCD can be played in DVD players that support the VCD format. The videocap.mpg file can also be played directly using a media player on a personal computer.


  

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