The program docs not give any indication, however, of the size of your clip. Digitizers .Although video digitizers and optical scanners both turn real-world images into computer graphics, they do so in very different ways. A video digitizer uses the signal from a familiar con- sumer video device such as a cam- corder. TV tuner, or VCR as its input. Star Command’s story is told in a more linear fashion, for your eight- member team is assigned a new mission each time you complete the current one.